I've been trying to get this NSTableView to populate for the last 7 hours. I am trying to get a list of all the currently running application and put them into an NSTableView. Eventually I would like to parse the resultes and organize the PID in one column and the Application Bundle in the other. I am getting an EXC_BAD_ACCESS error on " return [listOfWindows objectAtIndex:row];" I am currently using Xcode 4.3.2 and running OS X Lion 10.7.4. Thanks in advance everyone!
#interface AppDelegate : NSObject <NSApplicationDelegate>
{
IBOutlet NSMenu *statusMenu;
IBOutlet NSButton *button;
IBOutlet NSWindow *menuWindow;
IBOutlet NSTableView *proTable;
NSArray *listOfWindows;
IBOutlet NSArrayController *arrayController;
AppDelegate *mainMenu;
NSWorkspace *workSpace;
NSStatusItem *statusItem;
}
#property (assign) IBOutlet NSWindow *window;
-(IBAction)loadConfig:(id)sender;
#end
#import "AppDelegate.h"
#implementation AppDelegate
#synthesize window = _window;
- (void) awakeFromNib
{
[[NSDistributedNotificationCenter defaultCenter] addObserver:self
selector:#selector(loadMenu:)
name:#"WhiteBox"
object:nil];
[self addStatusItem];
//[proTable setDataSource:self];
listOfWindows = [[NSWorkspace sharedWorkspace] runningApplications];
NSLog(#"index %#", listOfWindows);
int y = 0;
y = [listOfWindows count];
NSLog(#"y = %d", y);
[proTable setAllowsMultipleSelection:YES];
}
-(void)applicationWillTerminate
{
NSLog(#"Will Terminate");
}
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
}
-(void)applicationDidResignActive:(NSNotification *)notification
{
NSLog(#"Resign Active");
}
-(void) addStatusItem
{
//Create a variable length status item from the system statusBar
statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength];
[statusItem retain];
//Set a Title for it
[statusItem setTitle:#"Status Item"];
//Set an Image and an alternate image
//[statusItem setImage:[NSImage imageNamed:#"lnc"]];
//[statusItem setAlternateImage: [NSImage imageNamed:#"status"]];
//Add a Tool Tip
[statusItem setToolTip:#"Status Item Tooltip"];
//Choose to highlight the item when clicked
[statusItem setHighlightMode:YES];
//To Trigger a method on click use the following two lines of code
[statusItem setMenu:statusMenu];
//[statusItem setAction:#selector(loadMenu:)];
}
-(IBAction)loadConfig:(id)sender
{
if(! [menuWindow isVisible] )
{
[menuWindow makeKeyAndOrderFront:sender];
} else {
[menuWindow performClose:sender];
}
}
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView
{
return [listOfWindows count];
}
- (id)tableView:(NSTableView *)tableView
objectValueForTableColumn:(NSTableColumn *)tableColumn
row:(NSInteger)row
{
return [listOfWindows objectAtIndex:row];
}
#end
What object is the table view's data source? I don't see any object in the source you posted as implementing the NSTableViewDataSource protocol.
Further, have you tried putting breakpoints in the various data source methods to see if the debugger stops in them? If not, it's usually a good sign that your data source isn't connected to your table view.
I got: -[NSRunningApplication copyWithZone:]: unrecognized selector error when I ran your code. This could be fixed by changing your return line in tableView:objectValueForTableColumn:row: to
return [[listOfWindows objectAtIndex:row]localizedName];
NSRunningApplication doesn't conform to NSCopying, so I don't know if you can put instances of that class in a table view. However, you can get its properties like localizedName, processIdentifier, and bundleIdentifier.
I've run into this problem before with classes that don't implement NSCopying, I'd be happy to know if anyone knows a way to use these classes in table views or outline views.
Related
I'm trying to support multi-item dragging with NSTableView and NSCollectionView using the new NSPasteboardWriting APIs. In my real app, I have dragging working for my table view, but not for my collection view (the NSFilePromiseProviderDelegate methods never get called). When I tried building a demo app from the ground up, I was able to reproduce this with an NSTableView.
I've set breakpoints inside both methods of DragDelegate, and neither gets called. -tableView:pasteboardWriterForRow: does get called, though. When I drag outside the app, I see the row's image attached to the cursor, but as far as Finder is concerned, there are no files on the pasteboard. There's no option to drop onto the Dock or a Finder window.
An instance of CollectionController is set as my table view's dataSource. It has a single column, whose text label is bound to the represented object (since it's just an NSString). I'm running Xcode 10.0 on Mojave 10.14.0. Here are the classes I have:
CollectionController
#interface CollectionController : NSObject <NSTableViewDataSource>
#property (strong) id<NSFilePromiseProviderDelegate> dragDelegate;
#end
#implementation CollectionController
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
return 1;
}
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn
row:(NSInteger)row
{
return #"Test string";
}
- (id<NSPasteboardWriting>)tableView:(NSTableView *)tableView pasteboardWriterForRow:(NSInteger)row {
self.dragDelegate = [[DragDelegate alloc] init];
return [[NSFilePromiseProvider alloc] initWithFileType:#"public.text"
delegate:self.dragDelegate];
return prov;
}
#end
DragDelegate
#interface DragDelegate: NSObject <NSFilePromiseProviderDelegate>
#end
#implementation DragDelegate
- (NSString *)filePromiseProvider:(NSFilePromiseProvider *)filePromiseProvider
fileNameForType:(NSString *)fileType
{
return #"file.txt";
}
- (void)filePromiseProvider:(NSFilePromiseProvider *)filePromiseProvider
writePromiseToURL:(NSURL *)url
completionHandler:(void (^)(NSError * _Nullable))completionHandler
{
NSData *data = [#"test file contents" dataUsingEncoding:NSUTF8StringEncoding];
[data writeToURL:url atomically:YES];
completionHandler(nil);
}
#end
Set the default dragging operation with
- (void)setDraggingSourceOperationMask:(NSDragOperation)mask forLocal:(BOOL)isLocal;
I am using XCode 6 on OS X 10.10 and have a storyboard containing a window with a split view controller, as shown in the following image.
The split view controller (highlighted in the image) is an instance of MyViewController, which has the following code:
MyViewController.h
#import <Cocoa/Cocoa.h>
#interface MyViewController : NSSplitViewController <NSTableViewDataSource>
#end
MyViewController.m
#import "MyViewController.h"
#implementation MyViewController
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
return 7;
}
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
return [NSString stringWithFormat:#"%ld", (long)row];
}
#end
I would like to make the view controller the dataSource of the NSTableView in my storyboard, however I am unable to connect them. Is there a reason for this?
In your NSSplitViewController-subclass viewDidLoad-method set the data source programmatically. You need to implement the child view controller class as well (with the tableView outlet connected to the control).
MySplitViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
for (NSSplitViewItem *item in self.splitViewItems)
{
NSViewController *controller = item.viewController;
if ([controller isKindOfClass:[MyChildController class]])
{
MyChildController *myController = (MyChildController *)controller;
myController.tableView.dataSource = self;
[myController.tableView reloadData];
}
}
}
But to tell you the truth I don't like this approach. It's more better when the table view's data source methods are in the native view controller class.
Another way to do that. MyChildController.h file:
#class MyChildViewController;
#protocol MyChildControllerDelegate <NSObject>
- (void)childController:(MyChildViewController *)controller didSelectRowAtIndex:(NSUInteger)index;
#end
#interface MyChildViewController : NSViewController <NSTableViewDataSource, NSTableViewDelegate>
#property (nonatomic, weak) id<MyChildControllerDelegate> delegate;
#property (nonatomic, retain) NSArray *items;
#property (nonatomic, weak) IBOutlet NSTableView *tableView;
#end
Don't forget to implement all the table view dataSource and delegate methods you need. MySplitViewController.m file:
- (void)viewDidLoad
{
[super viewDidLoad];
for (NSSplitViewItem *item in self.splitViewItems)
{
NSViewController *controller = item.viewController;
if ([controller isKindOfClass:[MyChildController class]])
{
MyChildController *myController = (MyChildController *)controller;
myController.delegate = self;
[myController setItems:_items];
}
}
}
I am having trouble getting this code to run after having it crash after several iterations. The intended behaviour is to simply display images in a Collection View from an array. If I comment out all the objects in the array, it runs with an empty collection view.
logo.png exists and can be properly loaded in other parts of the app through the dropdown. Delegate and DataSource is properly set to self. The Collection View has a single cell displayed with an ImageView in it (tagged as 100) and nothing else. Having a label instead of an image view causes a crash with any objects in the array as well.
The debugging output is
Could not dequeue a view of kind: UICollectionElementKindCell with identifier Cell - must
register a nib or a class for the identifier or connect a prototype cell in a storyboard
The relevant code is the following:
ViewController.m
#import "demo_frameworkViewController.h"
#interface demo_frameworkViewController ()
#end
#implementation demo_frameworkViewController {
NSMutableArray *imageArray;
}
#synthesize imageArray;
- (void)viewDidLoad
{
imageArray = [[NSMutableArray alloc] init];
[imageArray addObject:[UIImage imageNamed:#"logo.png"]];
[imageArray addObject:[UIImage imageNamed:#"logo.png"]];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark Collection View Methods
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return [self.imageArray count];
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"Cell" forIndexPath:indexPath];
UIImageView *imageDemo = (UIImageView *)[cell viewWithTag:100];
imageDemo.image =[imageArray objectAtIndex:indexPath.row];
[cell.layer setBorderWidth:2.0f];
[cell.layer setBorderColor:[UIColor whiteColor].CGColor];
return cell;
}
#end
ViewController.h
#import <UIKit/UIKit.h>
#interface demo_frameworkViewController : UIViewController <UINavigationControllerDelegate, UICollectionViewDelegate, UICollectionViewDataSource>
#property (nonatomic, retain) NSArray *imageArray;
#property (weak, nonatomic) IBOutlet UIImageView *imageView;
#end
The debugging output means that it cannot find a cell called 'Cell'. In your storyboard you need to set the Collection Reusable View value of the UICollectionViewCell to 'Cell' so that the UICollectionView knows what cell to use
I am making an app which uses many Textfields. Most of them are inside static tableViews. I use the split view application template. Every category selected from the left panel presents a storyboard scene inside a second view on the right panel.
I just want to get rid of the keyboard with the "done" button however everything i have tried that would work on a simple view fails to work under these circumstances.
Can you please help me out with this?
p.s. I try to dismiss the keyboard inside the implementation file of the presented storyboard scene. Should i do something inside the Detail Scene of the split view controller?
Here is my Scene's code:
.h
#import <UIKit/UIKit.h>
#interface AfoEsoda : UITableViewController <UITextFieldDelegate>{
}
#property (strong, nonatomic) IBOutlet UITextField *merismataTF;
-(IBAction)hideKeyboard:(id)sender;
#end
.m
#synthesize merismataTF;
- (void)viewDidLoad
{
[super viewDidLoad];
merismataTF.delegate=self ;
}
//---------Hide Keyboard-------------------
//Tried but didn't work
-(IBAction)hideKeyboard:(id)sender {
[merismataTF resignFirstResponder];
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}
//Of course i do not use both methods at the same time.
EDIT:
When i set the textfield's delegate to self i get this crash:
Try implementing the textField's delegate, set the delegate to self, and in the delegate's method
- (BOOL)textFieldShouldReturn:(UITextField *)textField
set
[textField resignFirstResponder];
Another way could be going through all of the view's subviews and if it is a text field, resign first responder:
for(int i=0;i<self.view.subviews.count;i++)
{
if([[self.view.subviews objectAtIndex:i] isKindOfClass:[UITextField class]])
{
if([[self.view.subviews objectAtIndex:i] isFirstResponder])
[[self.view.subviews objectAtIndex:i] resignFirstResponder];
}}
OK, I got it. Use this with with the textFieldShouldReturn method.
So here is your answer: You have declared your text field as a property and then use alloc and init it over and over again for each cell. Probably it only works properly for the last row.
Here is an example of how your cellForRow method should look like:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{ static NSString *cellIdentifier = #"My cell identifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
UITextField *newTextField;
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
newTextField = [[UITextField alloc] initWithFrame:CGRectMake:(0,0,25,25)];
newTextField.tag = 1;
newTextField.delegate = self;
[cell.contentView addSubview:newTextField];
}
else
newTextField = (UITextField *)[cell.contentView viewWithTag:1];
And then, if you need the textField's value for a certaing row, simply use:
UITextField *someTextField = (UITextField *)[[tableView cellForRowAtIndexPath:indexPath].contentView viewWithTag:1];
NSLog(#"textField.text = %#", someTextField.text);
I am a .Net developer who need to port a small project into Mac, so I know next to nothing about Objective C. In fact the code below was just a bunch of grasping at straws and shooting in the dark.
Trying to build a Status Menu program that opens one or another window depending on if it is a left-click or a right-click/ctrl+click. Here is what I have, and it works for left-click only (obviously):
-(void) awakeFromNib{
NSBundle *bundle = [NSbundle mainBundle];
statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSSquareStatusItemLength] retain];
[statusImage = [[NSImage alloc] initWithContentsOfFile:[bundle pathForResource:#"icon" ofType:#"png"]];
[statusItem setImage:statusImage];
[statusItem setToolTip:#"Program Name"];
[statusItem setHighlightMode:YES];
[statusItem setAction:#selector(openWin:)];
[statusItem setTarget: self];
}
-(void)openWin:(id)sender{
[self openLeftWindow:sender];
}
-(IBAction)openLeftWindow:(id)sender{
//Code to populate Left Click Window
[leftWindow makeKeyAndorderFront:nil];
}
-(IBAction)openRightWindow:(id)sender{
//Code to populate Right Click Window
[rightWindow makeKeyAndorderFront:nil];
}
It seems to me that the solution would be either an if statement in the openWin() function to determine which button is clicked (or if ctrl was held down) then run the appropriate code or to make the menu aware of both the left and right clicks. But neither of these have worked when I attempted to do so.
Thanks In Advance.
If you will be satisfied with detecting control-click and not right click, then the first block of code will do what you want. If you really need the right click detection, you will have to use a custom view instead of an image in your NSStatusItem, and the second block of code will work.
Simple Method:
- (void)openWin:(id)sender {
NSEvent *event = [NSApp currentEvent];
if([event modifierFlags] & NSControlKeyMask) {
[self openRightWindow:nil];
} else {
[self openLeftWindow:nil];
}
}
Custom view method:
- (void)awakeFromNib {
...
statusImage = ...
MyView *view = [MyView new];
view.image = statusImage;
[statusItem setView:view];
[statusItem setToolTip:#"Program Name"];
view target = self;
view action = #selector(openLeftWindow:);
view rightAction = #selector(openRightWindow:);
[view release];
//[statusImage release]; //If you are not using it anymore, you should release it.
}
MyView.h
#import <Cocoa/Cocoa.h>
#interface MyView : NSControl {
NSImage *image;
id target;
SEL action, rightAction;
}
#property (retain) NSImage *image;
#property (assign) id target;
#property (assign) SEL action, rightAction;
#end
MyView.m
#import "MyView.h"
#implementation MyView
#synthesize image, target, action, rightAction;
- (void)mouseUp:(NSEvent *)event {
if([event modifierFlags] & NSControlKeyMask) {
[NSApp sendAction:self.rightAction to:self.target from:self];
} else {
[NSApp sendAction:self.action to:self.target from:self];
}
}
- (void)rightMouseUp:(NSEvent *)event {
[NSApp sendAction:self.rightAction to:self.target from:self];
}
- (void)dealloc {
self.image = nil;
[super dealloc];
}
- (void)drawRect:(NSRect)rect {
[self.image drawInRect:self.bounds fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1];
}
#end
I would create a view and use the status items method.
-setView:
Then in the subclassed view you can detect ctrl+LMB using the following
- (void)mouseDown:(NSEvent *)theEvent
{
[super mouseDown:theEvent];
//Respond to the mouse click
if ([theEvent modifierFlags] & NSCommandKeyMask) //Command + LMB
{
//Do something
}
}
I think you can figure out the rest.
A more simplified response (Note, only works with control + click)
Properties:
#property (strong, nonatomic) NSStatusItem *statusItem;
#property (weak) IBOutlet NSMenu *statusMenu;
In Your Application Did Load:
[self.statusItem setAction:#selector(itemClicked:)];
Clicked Function:
- (void)itemClicked:(id)sender
{
NSEvent *event = [NSApp currentEvent];
if([event modifierFlags] & NSControlKeyMask) {
NSLog(#"Right Click Pressed");
[self.statusItem popUpStatusItemMenu:self.statusMenu];
} else {
// Do Nothing
NSLog(#"Left Click Pressed");
}
}