I want to badge a file and folder with some color (image). How can this be achieved?
I tried with icon service, and it works for files, but it is not working with folders.
I saw this behavior working Dropbox (10.4, 10.5 and 10.6)- how can this be done?
The blog post Cocoa Tutorial: Custom Folder Icons was very close one for me, but it was not working as expected.
Is there another solution other than icon service?
The following function is the solution I found for the problem
BOOL AddBadgeToItem(NSString* path,NSData* tag)
{
FSCatalogInfo info;
FSRef par;
FSRef ref;
Boolean dir = false;
if (tag&&(FSPathMakeRef([path fileSystemRepresentation],&par,&dir)==noErr))
{
HFSUniStr255 fork = {0,{0}};
sint16 refnum = kResFileNotOpened;
FSGetResourceForkName(&fork);
if (dir)
{
NSString *name = #"Icon\r";
memset(&info,0,sizeof(info));
((FileInfo*)(&info.finderInfo))->finderFlags = kIsInvisible;
OSErr error = FSCreateResourceFile(&par,[name lengthOfBytesUsingEncoding:NSUTF16LittleEndianStringEncoding],(UniChar*)[name cStringUsingEncoding:NSUTF16LittleEndianStringEncoding],kFSCatInfoFinderXInfo,&info,fork.length, fork.unicode,&ref,NULL);
if( error == dupFNErr )
{
// file already exists; prepare to try to open it
const char *iconFileSystemPath = [[path stringByAppendingPathComponent:#"\000I\000c\000o\000n\000\r"] fileSystemRepresentation];
OSStatus status = FSPathMakeRef((const UInt8 *)iconFileSystemPath, &ref, NULL);
if (status != noErr)
{
fprintf(stderr, "error: FSPathMakeRef() returned %d for file \"%s\"\n", (int)status, iconFileSystemPath);
}
}else if ( error != noErr)
{
return NO;
}
}
else
{
BlockMoveData(&par,&ref,sizeof(FSRef));
if (FSCreateResourceFork(&ref,fork.length,fork.unicode,0)!=noErr)
{
//test
if (FSOpenResourceFile(&ref,fork.length,fork.unicode,fsRdWrPerm,&refnum)!=noErr) {
return NO;
}
if (refnum!=kResFileNotOpened) {
UpdateResFile(refnum);
CloseResFile(refnum);
if (FSGetCatalogInfo(&par,kFSCatInfoFinderXInfo,&info,NULL,NULL,NULL)==noErr) {
((ExtendedFileInfo*)(&info.extFinderInfo))->extendedFinderFlags = kExtendedFlagsAreInvalid;
FSSetCatalogInfo(&par,kFSCatInfoFinderXInfo,&info);
}
}
//Test end
return NO;
}
}
OSErr errorr = FSOpenResourceFile(&ref,fork.length,fork.unicode,fsRdWrPerm,&refnum);
if (errorr!=noErr) {
return NO;
}
if (refnum!=kResFileNotOpened) {
CustomBadgeResource* cbr;
int len = [tag length];
Handle h = NewHandle(len);
if (h) {
BlockMoveData([tag bytes],*h,len);
AddResource(h,kIconFamilyType,128,"\p");
WriteResource(h);
ReleaseResource(h);
}
h = NewHandle(sizeof(CustomBadgeResource));
if (h) {
cbr = (CustomBadgeResource*)*h;
memset(cbr,0,sizeof(CustomBadgeResource));
cbr->version = kCustomBadgeResourceVersion;
cbr->customBadgeResourceID = 128;
AddResource(h,kCustomBadgeResourceType,kCustomBadgeResourceID,"\p");
WriteResource(h);
ReleaseResource(h);
}
UpdateResFile(refnum);
CloseResFile(refnum);
if (FSGetCatalogInfo(&par,kFSCatInfoFinderXInfo,&info,NULL,NULL,NULL)==noErr) {
((ExtendedFileInfo*)(&info.extFinderInfo))->extendedFinderFlags = kExtendedFlagHasCustomBadge;
FSSetCatalogInfo(&par,kFSCatInfoFinderXInfo,&info);
}
}
}
return NO;
}
You can do this using the -setIcon:forFile:options: method on NSWorkspace, which lets you just specify an NSImage to apply to the file/folder at the path you give it.
The intended approach is to create a Finder Sync app extension.
Related
What's is a reliable way to detect if user has enabled this API?
CGWindowListCreateImage returns a valid object even if screen recording API is disabled. There are multiple combinations possible (kCGWindowListOptionIncludingWindow, kCGWindowListOptionOnScreenBelowWindow) and only some will return NULL.
- (CGImageRef)createScreenshotImage
{
NSWindow *window = [[self view] window];
NSRect rect = [window frame];
rect.origin.y = NSHeight([[window screen] frame]) - NSMaxY([window frame]);
CGImageRef screenshot = CGWindowListCreateImage(
rect,
kCGWindowListOptionIncludingWindow,
//kCGWindowListOptionOnScreenBelowWindow,
0,//(CGWindowID)[window windowNumber],
kCGWindowImageBoundsIgnoreFraming);//kCGWindowImageDefault
return screenshot;
}
The only reliable way is through CGDisplayStreamCreate which is risky as Apple always changes privacy settings every year.
- (BOOL)canRecordScreen
{
if (#available(macOS 10.15, *)) {
CGDisplayStreamRef stream = CGDisplayStreamCreate(CGMainDisplayID(), 1, 1, kCVPixelFormatType_32BGRA, nil, ^(CGDisplayStreamFrameStatus status, uint64_t displayTime, IOSurfaceRef frameSurface, CGDisplayStreamUpdateRef updateRef) {
;
});
BOOL canRecord = stream != NULL;
if (stream) {
CFRelease(stream);
}
return canRecord;
} else {
return YES;
}
}
All of the solutions presented here have a flaw in one way or another. The root of the problem is that there's no correlation between your permission to know about a window (via the name in the window list), your permission to know about the process owner of the window (such as WindowServer and Dock). Your permission to view the pixels on screen is a combination of two sparse sets of information.
Here is a heuristic that covers all the cases as of macOS 10.15.1:
BOOL canRecordScreen = YES;
if (#available(macOS 10.15, *)) {
canRecordScreen = NO;
NSRunningApplication *runningApplication = NSRunningApplication.currentApplication;
NSNumber *ourProcessIdentifier = [NSNumber numberWithInteger:runningApplication.processIdentifier];
CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
NSUInteger numberOfWindows = CFArrayGetCount(windowList);
for (int index = 0; index < numberOfWindows; index++) {
// get information for each window
NSDictionary *windowInfo = (NSDictionary *)CFArrayGetValueAtIndex(windowList, index);
NSString *windowName = windowInfo[(id)kCGWindowName];
NSNumber *processIdentifier = windowInfo[(id)kCGWindowOwnerPID];
// don't check windows owned by this process
if (! [processIdentifier isEqual:ourProcessIdentifier]) {
// get process information for each window
pid_t pid = processIdentifier.intValue;
NSRunningApplication *windowRunningApplication = [NSRunningApplication runningApplicationWithProcessIdentifier:pid];
if (! windowRunningApplication) {
// ignore processes we don't have access to, such as WindowServer, which manages the windows named "Menubar" and "Backstop Menubar"
}
else {
NSString *windowExecutableName = windowRunningApplication.executableURL.lastPathComponent;
if (windowName) {
if ([windowExecutableName isEqual:#"Dock"]) {
// ignore the Dock, which provides the desktop picture
}
else {
canRecordScreen = YES;
break;
}
}
}
}
}
CFRelease(windowList);
}
If canRecordScreen is not set, you'll need to put up some kind of dialog that warns the user that they'll only be able to see the menubar, desktop picture, and the app's own windows. Here's how we presented it in our app xScope.
And yes, I'm still bitter that these protections were introduced with little regard to usability.
Apple provides direct low level api to check for access and grant access. No need to use tricky workarounds.
/* Checks whether the current process already has screen capture access */
#available(macOS 10.15, *)
public func CGPreflightScreenCaptureAccess() -> Bool
Use the above functions to check for screen capture access.
if access is not given use the below function to prompt for access
/* Requests event listening access if absent, potentially prompting */
#available(macOS 10.15, *)
public func CGRequestScreenCaptureAccess() -> Bool
Screenshot taken from documentation
#marek-h posted a good example that can detect the screen recording setting without showing privacy alert.
Btw, #jordan-h mentioned that this solution doesn't work when the app presents an alert via beginSheetModalForWindow.
I found that SystemUIServer process is always creating some windows with names: AppleVolumeExtra, AppleClockExtra, AppleBluetoothExtra ...
We can't get the names of these windows, before the screen recording is enabled in Privacy preferences. And when we can get one of these names at least, then it means that the user has enabled screen recording.
So we can check the names of the windows (created by SystemUIServer process) to detect the screen recording preference, and it works fine on macOS Catalina.
#include <AppKit/AppKit.h>
#include <libproc.h>
bool isScreenRecordingEnabled()
{
if (#available(macos 10.15, *)) {
bool bRet = false;
CFArrayRef list = CGWindowListCopyWindowInfo(kCGWindowListOptionAll, kCGNullWindowID);
if (list) {
int n = (int)(CFArrayGetCount(list));
for (int i = 0; i < n; i++) {
NSDictionary* info = (NSDictionary*)(CFArrayGetValueAtIndex(list, (CFIndex)i));
NSString* name = info[(id)kCGWindowName];
NSNumber* pid = info[(id)kCGWindowOwnerPID];
if (pid != nil && name != nil) {
int nPid = [pid intValue];
char path[PROC_PIDPATHINFO_MAXSIZE+1];
int lenPath = proc_pidpath(nPid, path, PROC_PIDPATHINFO_MAXSIZE);
if (lenPath > 0) {
path[lenPath] = 0;
if (strcmp(path, "/System/Library/CoreServices/SystemUIServer.app/Contents/MacOS/SystemUIServer") == 0) {
bRet = true;
break;
}
}
}
}
CFRelease(list);
}
return bRet;
} else {
return true;
}
}
I'm not aware of an API that's specifically for getting the screen recording permission status. Besides creating a CGDisplayStream and checking for nil, the Advances in macOS Security WWDC presentation also mentioned that certain metadata from the CGWindowListCopyWindowInfo() API will not be returned unless permission is granted. So something like this does seem to work, although it has the same issue of relying on implementation details of that function:
private func canRecordScreen() -> Bool {
guard let windows = CGWindowListCopyWindowInfo([.optionOnScreenOnly], kCGNullWindowID) as? [[String: AnyObject]] else { return false }
return windows.allSatisfy({ window in
let windowName = window[kCGWindowName as String] as? String
return windowName != nil
})
}
As of Nov19 chockenberry has correct answer.
As #onelittlefish pointed out the kCGWindowName is being omitted in case user has not enabled the screen recording access in privacy pane. This method also doesn't trigger the privacy alert.
- (BOOL)canRecordScreen
{
if (#available(macOS 10.15, *)) {
CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
NSUInteger numberOfWindows = CFArrayGetCount(windowList);
NSUInteger numberOfWindowsWithName = 0;
for (int idx = 0; idx < numberOfWindows; idx++) {
NSDictionary *windowInfo = (NSDictionary *)CFArrayGetValueAtIndex(windowList, idx);
NSString *windowName = windowInfo[(id)kCGWindowName];
if (windowName) {
numberOfWindowsWithName++;
} else {
//no kCGWindowName detected -> not enabled
break; //breaking early, numberOfWindowsWithName not increased
}
}
CFRelease(windowList);
return numberOfWindows == numberOfWindowsWithName;
}
return YES;
}
The most favorable answer is not exactly right, he left out some sences, like sharing state.
we can find the answer in WWDC(https://developer.apple.com/videos/play/wwdc2019/701/?time=1007)
Here are some excerpts from WWDC:
the window name and sharing state are not available, unless the user has preapproved the app for screen recording. And this is because some apps put sensitive data such as account names or more likely web page URLs in the window's name.
- (BOOL)ScreeningRecordPermissionCheck {
if (#available(macOS 10.15, *)) {
CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
NSUInteger numberOfWindows = CFArrayGetCount(windowList);
NSUInteger numberOfWindowsWithInfoGet = 0;
for (int idx = 0; idx < numberOfWindows; idx++) {
NSDictionary *windowInfo = (NSDictionary *)CFArrayGetValueAtIndex(windowList, idx);
NSString *windowName = windowInfo[(id)kCGWindowName];
NSNumber* sharingType = windowInfo[(id)kCGWindowSharingState];
if (windowName || kCGWindowSharingNone != sharingType.intValue) {
numberOfWindowsWithInfoGet++;
} else {
NSNumber* pid = windowInfo[(id)kCGWindowOwnerPID];
NSString* appName = windowInfo[(id)kCGWindowOwnerName];
NSLog(#"windowInfo get Fail pid:%lu appName:%#", pid.integerValue, appName);
}
}
CFRelease(windowList);
if (numberOfWindows == numberOfWindowsWithInfoGet) {
return YES;
} else {
return NO;
}
}
return YES;
}
As of MacOS 10.15.7 the heuristics of obtaining window-names for visible windows, and so know we have screen-capture permission, doesn't always work. Sometimes we just don't find valid windows we can query, and would wrongly deduce we don't have permissions.
However, I found another way to directly query (using sqlite) the Apple TCC database - the model where permissions are persisted. The screen-recording permissions are to be found in the "System level" TCC database ( residing in /Library/Application Support/com.apple.TCC/TCC.db). If you open the database using sqlite, and query: SELECT allowed FROM access WHERE client="com.myCompany.myApp" AND service="kTCCServiceScreenCapture" you'll get your answer.
Two downsides comparing to other answers:
to open this TCC.db database, your app must have "Full Disk Access" permission. It doesn't need to run with 'root' privileges, and root privileges won't help if you don't have the "Full disk access".
it takes about 15 millisec to run, which is slower than querying the window list.
The up side -- it's a direct query of the actual thing, and does not rely on any windows, or processes to exist at the time of query.
Here's some draft code to do this:
NSString *client = #"com.myCompany.myApp";
sqlite3 *tccDb = NULL;
sqlite3_stmt *statement = NULL;
NSString *pathToSystemTCCDB = #"/Library/Application Support/com.apple.TCC/TCC.db";
const char *pathToDBFile = [pathToSystemTCCDB fileSystemRepresentation];
if (sqlite3_open(pathToDBFile, &tccDb) != SQLITE_OK)
return nil;
const char *query = [[NSString stringWithFormat: #"SELECT allowed FROM access WHERE client=\"%#\" AND service=\"kTCCServiceScreenCapture\"",client] UTF8String];
if (sqlite3_prepare_v2(tccDb, query , -1, &statement, nil) != SQLITE_OK)
return nil;
BOOL allowed = NO;
while (sqlite3_step(statement) == SQLITE_ROW)
allowed |= (sqlite3_column_int(statement, 0) == 1);
if (statement)
sqlite3_finalize(statement);
if (tccDb)
sqlite3_close(tccDb);
return #(allowed);
}
Working for me.
Code from: https://gist.github.com/code4you2021/270859c71f90720d880ccb2474f4e7df
import Cocoa
struct ScreenRecordPermission {
static var hasPermission: Bool {
permissionCheck()
}
static func permissionCheck() -> Bool {
if #available(macOS 10.15, *) {
let runningApplication = NSRunningApplication.current
let processIdentifier = runningApplication.processIdentifier
guard let windows = CGWindowListCopyWindowInfo([.optionOnScreenOnly], kCGNullWindowID)
as? [[String: AnyObject]],
let _ = windows.first(where: { window -> Bool in
guard let windowProcessIdentifier = (window[kCGWindowOwnerPID as String] as? Int).flatMap(pid_t.init),
windowProcessIdentifier != processIdentifier,
let windowRunningApplication = NSRunningApplication(processIdentifier: windowProcessIdentifier),
windowRunningApplication.executableURL?.lastPathComponent != "Dock",
let _ = window[String(kCGWindowName)] as? String
else {
return false
}
return true
})
else {
return false
}
}
return true
}
static func requestPermission() {
if #available(macOS 10.15, *) {
CGWindowListCreateImage(CGRect(x: 0, y: 0, width: 1, height: 1), .optionOnScreenOnly, kCGNullWindowID, [])
}
}
}
# how to use
# print("hasPermission: ", ScreenRecordPermission.hasPermission)
The above answer is not working fine. Below is the correct answer.
private var canRecordScreen : Bool {
guard let windows = CGWindowListCopyWindowInfo([.optionOnScreenOnly], kCGNullWindowID) as? [[String: AnyObject]] else { return false }
return windows.allSatisfy({ window in
let windowName = window[kCGWindowName as String] as? String
let isSharingEnabled = window[kCGWindowSharingState as String] as? Int
return windowName != nil || isSharingEnabled == 1
})
}
When i was on Xcode version 6, the class i was using for accessing the Keychain was working but now in version 6.1 it is not working
Here is a part of the Keychain access class:
class func setData(value: NSData, forKey keyName: String) -> Bool {
var keychainQueryDictionary: NSMutableDictionary = self.setupKeychainQueryDictionaryForKey(keyName)
keychainQueryDictionary[kSecValueData as String] = value
// Protect the keychain entry so it's only valid when the device is unlocked
keychainQueryDictionary[kSecAttrAccessible as String] = kSecAttrAccessibleWhenUnlocked
let status: OSStatus = SecItemAdd(keychainQueryDictionary, nil)
if Int(status) == errSecSuccess { //I GET THE ERROR HERE
return true
} else if Int(status) == errSecDuplicateItem {
return self.updateData(value, forKey: keyName)
} else {
return false
}
}
It is not the only place where it is doing it here is another part of the code:
class func removeObjectForKey(keyName: String) -> Bool {
let keychainQueryDictionary: NSMutableDictionary = self.setupKeychainQueryDictionaryForKey(keyName)
//Delete
let status: OSStatus = SecItemDelete(keychainQueryDictionary);
if Int(status) == errSecSuccess { //GET ERROR HERE
return true
} else {
return false
}
}
It look likes the problem is with errSecSuccess can somebody help me please
OSStatus is an alias for Int32, so I think you solve that by removing the conversion to Int, like in:
if status == errSecSuccess {
Side note: your multiple if/elseif/else can be replaced by a switch:
switch (status) {
case errSecSuccess:
...
case errSecDuplicateItem:
...
default:
...
}
more readable in my opinion
I have developed a Mac app which I want to start as soon as the Mac is started. How can I achieve this functionality programmatically?
I know about launchd, but can't find a working example.
This code below was developed from an excellent blog post by Tim Schroeder: The Launch At Login Sandbox Project. Actually more or less borrowed completely from there-- it looks like I only ever had to change the log messages and strings in there, so it's pretty rock solid if I never screwed with it.
Where my opinion differs with that post is that there should be no "helper" app, even if you want the app to launch without a GUI at login. It's unnecessary. If you want your app to have a background mode that runs at login or when the use closes the GUI, you should switch the app to accessory mode as detailed in my answer here. You don't need to deal with subprojects and compiling separate executables. Just have one.
Anyways, Tim's eminently useful code. It uses a segmented control on a preferences panel to toggle the app on/off. The segmentedControl value uses cocoa-bindings to bind the control value to NSUserDefaults, so all that's seen here is registering/unregistering the app as a login item, and error checking/alerting.
- (IBAction)toggleRunAtLogin:(NSSegmentedControl*)sender {
NSLog(#"toggling run at login");
NSUInteger clickedSegment = [sender selectedSegment];
if (clickedSegment == 0) { // ON
// Turn on launch at login
NSLog(#"... to ON");
if (!SMLoginItemSetEnabled ((__bridge CFStringRef)#"com.yourCo.yourApp", YES)) {
NSAlert *alert = [NSAlert alertWithMessageText:#"An error ocurred"
defaultButton:#"OK"
alternateButton:nil
otherButton:nil
informativeTextWithFormat:#"Couldn't add App to launch at login item list."];
[alert runModal];
}
}
if (clickedSegment == 1) { // OFF
// Turn off launch at login
NSLog(#"... to OFF");
if (!SMLoginItemSetEnabled ((__bridge CFStringRef)#"com.yourCo.yourApp", NO)) {
NSAlert *alert = [NSAlert alertWithMessageText:#"An error ocurred"
defaultButton:#"OK"
alternateButton:nil
otherButton:nil
informativeTextWithFormat:#"Couldn't remove App from launch at login item list."];
[alert runModal];
}
}
}
A great example of the implementation of this can be found at https://github.com/nfarina/feeds/blob/master/Feeds/LoginItems.m
#import "LoginItems.h"
#implementation LoginItems
// Copied from https://github.com/carpeaqua/Shared-File-List-Example
- (void)enableLoginItemWithLoginItemsReference:(LSSharedFileListRef )theLoginItemsRefs ForPath:(NSString *)appPath {
// We call LSSharedFileListInsertItemURL to insert the item at the bottom of Login Items list.
CFURLRef url = (CFURLRef)[NSURL fileURLWithPath:appPath];
LSSharedFileListItemRef item = LSSharedFileListInsertItemURL(theLoginItemsRefs, kLSSharedFileListItemLast, NULL, NULL, url, NULL, NULL);
if (item)
CFRelease(item);
}
- (void)disableLoginItemWithLoginItemsReference:(LSSharedFileListRef )theLoginItemsRefs ForPath:(NSString *)appPath {
UInt32 seedValue;
CFURLRef thePath = NULL;
// We're going to grab the contents of the shared file list (LSSharedFileListItemRef objects)
// and pop it in an array so we can iterate through it to find our item.
CFArrayRef loginItemsArray = LSSharedFileListCopySnapshot(theLoginItemsRefs, &seedValue);
for (id item in (NSArray *)loginItemsArray) {
LSSharedFileListItemRef itemRef = (LSSharedFileListItemRef)item;
if (LSSharedFileListItemResolve(itemRef, 0, (CFURLRef*) &thePath, NULL) == noErr) {
if ([[(NSURL *)thePath path] hasPrefix:appPath]) {
LSSharedFileListItemRemove(theLoginItemsRefs, itemRef); // Deleting the item
}
// Docs for LSSharedFileListItemResolve say we're responsible
// for releasing the CFURLRef that is returned
if (thePath != NULL) CFRelease(thePath);
}
}
if (loginItemsArray != NULL) CFRelease(loginItemsArray);
}
- (BOOL)loginItemExistsWithLoginItemReference:(LSSharedFileListRef)theLoginItemsRefs ForPath:(NSString *)appPath {
BOOL found = NO;
UInt32 seedValue;
CFURLRef thePath = NULL;
// We're going to grab the contents of the shared file list (LSSharedFileListItemRef objects)
// and pop it in an array so we can iterate through it to find our item.
CFArrayRef loginItemsArray = LSSharedFileListCopySnapshot(theLoginItemsRefs, &seedValue);
for (id item in (NSArray *)loginItemsArray) {
LSSharedFileListItemRef itemRef = (LSSharedFileListItemRef)item;
if (LSSharedFileListItemResolve(itemRef, 0, (CFURLRef*) &thePath, NULL) == noErr) {
if ([[(NSURL *)thePath path] hasPrefix:appPath]) {
found = YES;
break;
}
// Docs for LSSharedFileListItemResolve say we're responsible
// for releasing the CFURLRef that is returned
if (thePath != NULL) CFRelease(thePath);
}
}
if (loginItemsArray != NULL) CFRelease(loginItemsArray);
return found;
}
// Our code
+ (LoginItems *)userLoginItems {
static LoginItems *userItems = nil;
return userItems ?: (userItems = [LoginItems new]);
}
- (BOOL)currentAppLaunchesAtStartup {
NSString * appPath = [[NSBundle mainBundle] bundlePath];
LSSharedFileListRef loginItems = LSSharedFileListCreate(NULL, kLSSharedFileListSessionLoginItems, NULL);
BOOL exists = [self loginItemExistsWithLoginItemReference:loginItems ForPath:appPath];
CFRelease(loginItems);
return exists;
}
- (void)setCurrentAppLaunchesAtStartup:(BOOL)currentAppLaunchesAtStartup {
NSString * appPath = [[NSBundle mainBundle] bundlePath];
LSSharedFileListRef loginItems = LSSharedFileListCreate(NULL, kLSSharedFileListSessionLoginItems, NULL);
if (loginItems) {
if (!self.currentAppLaunchesAtStartup)
[self enableLoginItemWithLoginItemsReference:loginItems ForPath:appPath];
else
[self disableLoginItemWithLoginItemsReference:loginItems ForPath:appPath];
CFRelease(loginItems);
}
}
#end
I found the solution
Thanks
- (void)enableLoginItemWithLoginItemsReference:(LSSharedFileListRef)theLoginItemsRefs ForPath:(NSString *)appPath {
// We call LSSharedFileListInsertItemURL to insert the item at the bottom of Login Items list.
CFURLRef url = (__bridge CFURLRef)[NSURL fileURLWithPath:appPath];
LSSharedFileListItemRef item = LSSharedFileListInsertItemURL(theLoginItemsRefs, kLSSharedFileListItemLast, NULL, NULL, url, NULL, NULL);
if (item)
CFRelease(item);
}
- (void)disableLoginItemWithLoginItems {
UInt32 seedValue;
CFURLRef thePath = NULL;
NSString * appPath = [[NSBundle mainBundle] bundlePath];
// Create a reference to the shared file list.
LSSharedFileListRef loginItems = LSSharedFileListCreate(NULL, kLSSharedFileListSessionLoginItems, NULL);
// We're going to grab the contents of the shared file list (LSSharedFileListItemRef objects)
// and pop it in an array so we can iterate through it to find our item.
CFArrayRef loginItemsArray = LSSharedFileListCopySnapshot(loginItems, &seedValue);
for (id item in (__bridge NSArray *)loginItemsArray) {
LSSharedFileListItemRef itemRef = (__bridge LSSharedFileListItemRef)item;
if (LSSharedFileListItemResolve(itemRef, 0, (CFURLRef*) &thePath, NULL) == noErr) {
if ([[(__bridge NSURL *)thePath path] hasPrefix:appPath]) {
LSSharedFileListItemRemove(loginItems, itemRef); // Deleting the item
}
// Docs for LSSharedFileListItemResolve say we're responsible
// for releasing the CFURLRef that is returned
if (thePath != NULL) CFRelease(thePath);
}
}
if (loginItemsArray != NULL) CFRelease(loginItems);
}
- (BOOL)loginItemExistsWithLoginItemReference:(LSSharedFileListRef)theLoginItemsRefs ForPath:(NSString *)appPath {
BOOL found = NO;
UInt32 seedValue;
CFURLRef thePath = NULL;
// We're going to grab the contents of the shared file list (LSSharedFileListItemRef objects)
// and pop it in an array so we can iterate through it to find our item.
CFArrayRef loginItemsArray = LSSharedFileListCopySnapshot(theLoginItemsRefs, &seedValue);
for (id item in (__bridge NSArray *)loginItemsArray) {
LSSharedFileListItemRef itemRef = (__bridge LSSharedFileListItemRef)item;
if (LSSharedFileListItemResolve(itemRef, 0, (CFURLRef*) &thePath, NULL) == noErr) {
if ([[(__bridge NSURL *)thePath path] hasPrefix:appPath]) {
found = YES;
break;
}
// Docs for LSSharedFileListItemResolve say we're responsible
// for releasing the CFURLRef that is returned
if (thePath != NULL) CFRelease(thePath);
}
}
if (loginItemsArray != NULL) CFRelease(loginItemsArray);
return found;
}
How do I restrict a NSTextField to allow only numbers/integers? I've found questions like this one, but they didn't help!
Try to make your own NSNumberFormatter subclass and check the input value in -isPartialStringValid:newEditingString:errorDescription: method.
#interface OnlyIntegerValueFormatter : NSNumberFormatter
#end
#implementation OnlyIntegerValueFormatter
- (BOOL)isPartialStringValid:(NSString*)partialString newEditingString:(NSString**)newString errorDescription:(NSString**)error
{
if([partialString length] == 0) {
return YES;
}
NSScanner* scanner = [NSScanner scannerWithString:partialString];
if(!([scanner scanInt:0] && [scanner isAtEnd])) {
NSBeep();
return NO;
}
return YES;
}
#end
And then set this formatter to your NSTextField:
OnlyIntegerValueFormatter *formatter = [[[OnlyIntegerValueFormatter alloc] init] autorelease];
[textField setFormatter:formatter];
Swift 3 Version
import Foundation
class OnlyIntegerValueFormatter: NumberFormatter {
override func isPartialStringValid(_ partialString: String, newEditingString newString: AutoreleasingUnsafeMutablePointer<NSString?>?, errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Bool {
// Ability to reset your field (otherwise you can't delete the content)
// You can check if the field is empty later
if partialString.isEmpty {
return true
}
// Optional: limit input length
/*
if partialString.characters.count>3 {
return false
}
*/
// Actual check
return Int(partialString) != nil
}
}
Use:
let onlyIntFormatter = OnlyIntegerValueFormatter()
myNsTextField.formatter = onlyIntFormatter
Here's a solution with filtering. Give a delegate and an outlet to textfield and set controlTextDidChange method.
- (void)controlTextDidChange:(NSNotification *)aNotification {
NSTextField *textfield = [notification object];
NSCharacterSet *charSet = [NSCharacterSet characterSetWithCharactersInString:#"0123456789"];
char *stringResult = malloc([textfield.stringValue length]);
int cpt=0;
for (int i = 0; i < [textfield.stringValue length]; i++) {
unichar c = [textfield.stringValue characterAtIndex:i];
if ([charSet characterIsMember:c]) {
stringResult[cpt]=c;
cpt++;
}
}
stringResult[cpt]='\0';
textfield.stringValue = [NSString stringWithUTF8String:stringResult];
free(stringResult);
}
Try this -
NSNumberFormatter *formatter = [[[NSNumberFormatter alloc] init] autorelease];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
[textField setFormatter:formatter];
Here is a Swift version:
override func isPartialStringValid(partialString: String, newEditingString newString: AutoreleasingUnsafeMutablePointer<NSString?>, errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>) -> Bool {
if (count(partialString.utf16)) {
return true
}
if (partialString.rangeOfCharacterFromSet(NSCharacterSet.decimalDigitCharacterSet().invertedSet) != nil) {
NSBeep()
return false
}
return true
}
In SWIFT, I do it this way
Convert the text value to Int with Int()
Check the converted value is not less than 0
If less than 0, display error message other accept the value
if ((Int(txtField.stringValue)) < 0){
// Display error message
}
[Works with Swift 3.0.1]
As others suggested, subclass NumberFormatter and override isPartialStringValid method. The easiest way is to drop a NumberFormatter object under your NSTextField in xib/storyboard and update it's Custom Class.
Next implementation allows only integers or blank value and plays a beep if string contains illegal characters.
class IntegerFormatter: NumberFormatter {
override func isPartialStringValid(_ partialString: String, newEditingString newString: AutoreleasingUnsafeMutablePointer<NSString?>?, errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Bool {
// Allow blank value
if partialString.numberOfCharacters() == 0 {
return true
}
// Validate string if it's an int
if partialString.isInt() {
return true
} else {
NSBeep()
return false
}
}
}
String's numberOfCharacters() and isInt() are methods added in an extension.
extension String {
func isInt() -> Bool {
if let intValue = Int(self) {
if intValue >= 0 {
return true
}
}
return false
}
func numberOfCharacters() -> Int {
return self.characters.count
}
}
Here is the steps to create the same....
Just create the ANYCLASS(called SAMPLE) with sub classing the NSNumberFormatter ...
in .m file write the following code...
- (BOOL)isPartialStringValid:(NSString *)partialString newEditingString:(NSString **)newString errorDescription:(NSString **)error {
// Make sure we clear newString and error to ensure old values aren't being used
if (newString) { *newString = nil;}
if (error) {*error = nil;}
static NSCharacterSet *nonDecimalCharacters = nil;
if (nonDecimalCharacters == nil) {
nonDecimalCharacters = [[NSCharacterSet decimalDigitCharacterSet] invertedSet] ;
}
if ([partialString length] == 0) {
return YES; // The empty string is okay (the user might just be deleting everything and starting over)
} else if ([partialString rangeOfCharacterFromSet:nonDecimalCharacters].location != NSNotFound) {
return NO; // Non-decimal characters aren't cool!
}
return YES;
}
Now.. in your Actual Class set the formatter to your NSTextField object like below...
NSTextField *mySampleTxtFld;
for this set the Formatter...
SAMPLE* formatter=[[SAMPLE alloc]init];// create SAMPLE FORMATTER OBJECT
self.mySampleTxtFld.delegate=self;
[self.mySampleTxtFld setFormatter:formatter];
Your done!!!
Swift 2.0 custom formatter with 0 instead of empty space :
class OnlyIntegerValueFormatter: NSNumberFormatter {
override func isPartialStringValid(partialString: String, newEditingString newString: AutoreleasingUnsafeMutablePointer<NSString?>, errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>) -> Bool {
if partialString.isEmpty {
newString.memory = "0"
return false
}
if Int(partialString) < 0 {
NSBeep()
return false
} else {
return true
}
}
}
// NSTextFieldNumberFormatter+Extension.swift
import Foundation
class TextFieldIntegerValueFormatter: NumberFormatter {
var maxLength: Int
init(maxLength: Int) {
self.maxLength = maxLength
super.init()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func isPartialStringValid(_ partialString: String, newEditingString newString: AutoreleasingUnsafeMutablePointer<NSString?>?, errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Bool {
// Ability to reset your field (otherwise you can't delete the content)
// You can check if the field is empty later
if partialString.isEmpty {
return true
}
// Optional: limit input length
if partialString.count > maxLength {
return false
}
// Actual check
return Int(partialString) != nil
}
}
//Need to call like:
myNsTextField.formatter = TextFieldIntegerValueFormatter(maxLength: 6)
I try to play some "media" but at the time the AVPlayer starts I don't know if it is audio or Video.
I connected the player Layer and it works fine.
self.avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:[[PCPlayerManager sharedManager] audioPlayer]];
avPlayerLayer.videoGravity = AVLayerVideoGravityResizeAspect;
avPlayerLayer.frame = CGRectMake(0, 0, videoView.frame.size.width, videoView.frame.size.height);
[videoView.layer addSublayer:avPlayerLayer];
But how can I check if there is Video so I can add/remove some Options?
From Apple’s sample code project AVSimplePlayer:
// Set up an AVPlayerLayer according to whether the asset contains video.
if ([[(AVAsset *)asset tracksWithMediaType:AVMediaTypeVideo] count] != 0)
For Swift 4.2 you can do the following:
func isAudioAvailable() -> Bool? {
return self.player?._asset?.tracks.filter({$0.mediaType == AVMediaType.audio}).count != 0
}
func isVideoAvailable() -> Bool? {
return self.player?._asset?.tracks.filter({$0.mediaType == AVMediaType.video}).count != 0
}
or as extension
extension AVPlayer {
var isAudioAvailable: Bool? {
return self._asset?.tracks.filter({$0.mediaType == AVMediaType.audio}).count != 0
}
var isVideoAvailable: Bool? {
return self._asset?.tracks.filter({$0.mediaType == AVMediaType.video}).count != 0
}
}
I'm not sure but AVPlayerItem has the following array [mPlayerItem.asset.tracks] This contains two objects,one for video and another for audio.Access it as follows [mPlayerItem.asset.tracks objectAtIndex:0] for video and [mPlayerItem.asset.tracks objectAtIndex:1] for audio.
This helped me:
// source from https://stackoverflow.com/a/55581216 Changed for last release AVFoundation
func isAudioAvailable() -> Bool? {
return self.player.currentItem?.tracks.filter({$0.assetTrack!.mediaType == AVMediaType.audio}).count != 0
}
func isVideoAvailable() -> Bool? {
return self.player.currentItem?.tracks.filter({$0.assetTrack!.mediaType == AVMediaType.video}).count != 0
}
I found this better solution
func isVideoAvailable(item: AVPlayerItem) -> Bool {
for video in item.tracks {
if video.assetTrack?.mediaType == .video {
return true
}
}
return false
}
And this
if currentItem.tracks.contains(where: { track in
track.assetTrack?.mediaType == .video
}) {
// This Code goes Here!
}
UPDATED: sean-stayns answer in Swift 5.5
extension AVPlayer {
var isAudioAvailable: Bool? {
return self.currentItem?.asset.tracks.filter({$0.mediaType == .audio}).count != 0
}
var isVideoAvailable: Bool? {
return self.currentItem?.asset.tracks.filter({$0.mediaType == .video}).count != 0
}
}