I am trying to display a UITextField based on the OK button on the alert windows. So, when the user presses the OK button, then another textbox should come where the user can enter profile name. However, based on the code below, I see that immediately after OK is clicked, it goes on saying, that "No profile name specified" as it finds the profile.txt as empty. Here is piece of code, which displays the popup alert, prompting the user to save a profile with profile name.
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Hello, User ! Save Profile" message:#"Provide a profile Name" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"OK" ,nil];
profileName = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 45.0, 2600.0, 25.0)];
[profileName setBackgroundColor:[UIColor whiteColor]];
[alert addSubview:profileName];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0.0, 130.0);
[alert setTransform:myTransform];
[alert show];
[alert release];
Appreciate your response !
Thanks in advance !
I was able to get it working for iOS7 with,
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
profileName = [alert textFieldAtIndex:0];
Thanks
I am trying to set up an alert view so that when the "Ok" button is pressed, an action sheet comes up with two options. I believe i have it in the right format and there are no errors, but when I run it, nothing happens. please help and thank you in advanced.
-(IBAction)sendSG:(id)sender{
UIAlertView *message = [[UIAlertView alloc]
initWithTitle:#"Send Study Guides!"
message:#"Please send your study guides to help create a bigger and more efficent network of study guides. You can send them by email, or you can take a picture of your study guide and send it to us."
delegate:self //Changed Here
cancelButtonTitle:#"Cancel"
otherButtonTitles:#"Ok", nil];
[message show];
}
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 0) {
UIActionSheet *sendOptions = [[UIActionSheet alloc]
initWithTitle:#"Add study guide"
delegate:self
cancelButtonTitle:#"Cancel"
destructiveButtonTitle:#"Destructive Button"
otherButtonTitles:#"Email", #"Take a picture", nil];
[sendOptions showInView:self.view];
}
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 0) {
NSString *emailTitle = #"Study Guides";
NSArray *toRecipents = [NSArray arrayWithObject:#"blank#gmail.com"];
MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
[mc setSubject:emailTitle];
[mc setToRecipients:toRecipents];
[self presentViewController:mc animated:YES completion:NULL];
}
}
set Delegate of your alert view to self.
In your code,
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
is not being called due to this
Yes, and change your button index too… forgot to tell you that. it should be 1 for both alertView & actionSheet.
Make your viewController ActionSheet Delegate. add "UIActionSheetDelegate" in your viewController.h
#interface XYZViewController : UIViewController UIActionSheetDelegate (enclose in angular braces)
Everything Else will work fine.. Let me know if there is any issue
You got the wrong button index.
The button buttonIndex == 0 is the cancel button,buttonIndex == 1 is the ok button.
Try this in alert view's callback:
double delayInSeconds = 1.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
// show action sheet here.
});
If it works for you, modify the delayInSeconds as you wish.
I want to create a user note form in my application,currently am using one textview inside a view its looking bad !! is there any other control suits for this purpose? Main aim is when user click the button a small textview will appear they can add comments there and save it into plist.
I want something like this(check the image)
i want that kind of usernotes (its my image) please give me some advices and helps to develop this..
Using UIAlertView with UITextView can be useful for you.
Implement UIAlertViewDelegate in .h file.
UITextView *comments;
-(IBAction)btnAddClicked:(id)sender
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Noreply Email" message:#"\n\n\n\n\n" delegate:self cancelButtonTitle:#"Close" otherButtonTitles:#"Send", nil];
comments = [[UITextView alloc] initWithFrame:CGRectMake(15,45, 255, 100)];
[comments setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"mailbody.png"]]];
[comments setFont:[UIFont fontWithName:#"Helvetica" size:15]];
comments.scrollEnabled = YES;
[comments becomeFirstResponder];
[alert addSubview:comments];
[alert show];
[alert release];
}
Here alert will be prompted with small textview you can add comments and then handle text inside delegate method like this.
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex==1) //Send button pressed
{
//handle your comment here
NSLog(#"%#",comments.text);
}
}
What i am trying to achieve is go to another view when my alert view button is clicked. My alert view is inside my loadingView, this alert view is called from another class called classA.
This is how it is called in classA.
[LoadingViewController showError];
This is the method in loadingView in loadingView class.
+ (void)showDestinationError{
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:#"Error"
message:#"Error"
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles: nil];
alert.tag = DEST_ERR;
[alert show];
}
Button action
+ (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(alertView.tag = DEST_ERR){
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:[NSBundle mainBundle]];
UINavigationController *secondView = [storyboard instantiateViewControllerWithIdentifier:#"NavigationController"];
secondView.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[secondView presentModalViewController:secondView animated:YES];
}
}
This gives me an error. 'Application tried to present modal view controller on itself. Presenting controller is UINavigationController:..
Note: my method is a '+'
The problem is this line:
[secondView presentModalViewController:secondView animated:YES];
A view controller can't present itself, and in this case doesn't even exist yet).
The most obvious way to fix this is to make your clickedButtonAtIndex an instance method since it needs to access information about the particular instance. You would then use this:
[self presentModalViewController:secondView animated:YES];
Otherwise, you need to get a reference to a view which can present your view controller. There are various ways to do this depending on how your app is setup which could include getting it from your app delegate or referencing the app window.
When I display an NSAlert like this, I get the response straight away:
int response;
NSAlert *alert = [NSAlert alertWithMessageText:... ...];
response = [alert runModal];
The problem is that this is application-modal and my application is document based. I display the alert in the current document's window by using sheets, like this:
int response;
NSAlert *alert = [NSAlert alertWithMessageText:... ...];
[alert beginSheetModalForWindow:aWindow
modalDelegate:self
didEndSelector:#selector(alertDidEnd:returnCode:contextInfo:)
contextInfo:&response];
//elsewhere
- (void) alertDidEnd:(NSAlert *) alert returnCode:(int) returnCode contextInfo:(int *) contextInfo
{
*contextInfo = returnCode;
}
The only issue with this is that beginSheetModalForWindow: returns straight away so I cannot reliably ask the user a question and wait for a response. This wouldn't be a big deal if I could split the task into two areas but I can't.
I have a loop that processes about 40 different objects (that are in a tree). If one object fails, I want the alert to show and ask the user whether to continue or abort (continue processing at the current branch), but since my application is document based, the Apple Human Interface Guidelines dictate to use sheets when the alert is specific to a document.
How can I display the alert sheet and wait for a response?
We created a category on NSAlert to run alerts synchronously, just like application-modal dialogs:
NSInteger result;
// Run the alert as a sheet on the main window
result = [alert runModalSheet];
// Run the alert as a sheet on some other window
result = [alert runModalSheetForWindow:window];
The code is available via GitHub, and the current version posted below for completeness.
Header file NSAlert+SynchronousSheet.h:
#import <Cocoa/Cocoa.h>
#interface NSAlert (SynchronousSheet)
-(NSInteger) runModalSheetForWindow:(NSWindow *)aWindow;
-(NSInteger) runModalSheet;
#end
Implementation file NSAlert+SynchronousSheet.m:
#import "NSAlert+SynchronousSheet.h"
// Private methods -- use prefixes to avoid collisions with Apple's methods
#interface NSAlert ()
-(IBAction) BE_stopSynchronousSheet:(id)sender; // hide sheet & stop modal
-(void) BE_beginSheetModalForWindow:(NSWindow *)aWindow;
#end
#implementation NSAlert (SynchronousSheet)
-(NSInteger) runModalSheetForWindow:(NSWindow *)aWindow {
// Set ourselves as the target for button clicks
for (NSButton *button in [self buttons]) {
[button setTarget:self];
[button setAction:#selector(BE_stopSynchronousSheet:)];
}
// Bring up the sheet and wait until stopSynchronousSheet is triggered by a button click
[self performSelectorOnMainThread:#selector(BE_beginSheetModalForWindow:) withObject:aWindow waitUntilDone:YES];
NSInteger modalCode = [NSApp runModalForWindow:[self window]];
// This is called only after stopSynchronousSheet is called (that is,
// one of the buttons is clicked)
[NSApp performSelectorOnMainThread:#selector(endSheet:) withObject:[self window] waitUntilDone:YES];
// Remove the sheet from the screen
[[self window] performSelectorOnMainThread:#selector(orderOut:) withObject:self waitUntilDone:YES];
return modalCode;
}
-(NSInteger) runModalSheet {
return [self runModalSheetForWindow:[NSApp mainWindow]];
}
#pragma mark Private methods
-(IBAction) BE_stopSynchronousSheet:(id)sender {
// See which of the buttons was clicked
NSUInteger clickedButtonIndex = [[self buttons] indexOfObject:sender];
// Be consistent with Apple's documentation (see NSAlert's addButtonWithTitle) so that
// the fourth button is numbered NSAlertThirdButtonReturn + 1, and so on
NSInteger modalCode = 0;
if (clickedButtonIndex == NSAlertFirstButtonReturn)
modalCode = NSAlertFirstButtonReturn;
else if (clickedButtonIndex == NSAlertSecondButtonReturn)
modalCode = NSAlertSecondButtonReturn;
else if (clickedButtonIndex == NSAlertThirdButtonReturn)
modalCode = NSAlertThirdButtonReturn;
else
modalCode = NSAlertThirdButtonReturn + (clickedButtonIndex - 2);
[NSApp stopModalWithCode:modalCode];
}
-(void) BE_beginSheetModalForWindow:(NSWindow *)aWindow {
[self beginSheetModalForWindow:aWindow modalDelegate:nil didEndSelector:nil contextInfo:nil];
}
#end
The solution is to call
[NSApp runModalForWindow:alert];
after beginSheetModalForWindow. Also, you need to implement a delegate that catches the "dialog has closed" action, and calls [NSApp stopModal] in response.
Here is a NSAlert category that solves the issue (as suggested by Philipp with the solution proposed by Frederick and improved by Laurent P.: I use a code block instead of a delegate, so it is simplified once again).
#implementation NSAlert (Cat)
-(NSInteger) runModalSheetForWindow:(NSWindow *)aWindow
{
[self beginSheetModalForWindow:aWindow completionHandler:^(NSModalResponse returnCode)
{ [NSApp stopModalWithCode:returnCode]; } ];
NSInteger modalCode = [NSApp runModalForWindow:[self window]];
return modalCode;
}
-(NSInteger) runModalSheet {
return [self runModalSheetForWindow:[NSApp mainWindow]];
}
#end
Just in case anyone comes looking for this (I did), I solved this with the following:
#interface AlertSync: NSObject {
NSInteger returnCode;
}
- (id) initWithAlert: (NSAlert*) alert asSheetForWindow: (NSWindow*) window;
- (NSInteger) run;
#end
#implementation AlertSync
- (id) initWithAlert: (NSAlert*) alert asSheetForWindow: (NSWindow*) window {
self = [super init];
[alert beginSheetModalForWindow: window
modalDelegate: self didEndSelector: #selector(alertDidEnd:returnCode:) contextInfo: NULL];
return self;
}
- (NSInteger) run {
[[NSApplication sharedApplication] run];
return returnCode;
}
- (void) alertDidEnd: (NSAlert*) alert returnCode: (NSInteger) aReturnCode {
returnCode = aReturnCode;
[[NSApplication sharedApplication] stopModal];
}
#end
Then running an NSAlert synchronously is as simple as:
AlertSync* sync = [[AlertSync alloc] initWithAlert: alert asSheetForWindow: window];
int returnCode = [sync run];
[sync release];
Note there is potential for re-entrancy issues as discussed, so be careful if doing this.
Unfortunately, there is not much you can do here. You basically have to make a decision: re-architect your application so that it can process the object in an asynchronous manner or use the non-approved, deprecated architecture of presenting application modal alerts.
Without knowing any information about your actual design and how you processes these objects, it's hard to give any further information. Off the top of my head, though, a couple of thoughts might be:
Process the objects in another thread that communicates with the main thread through some kind of run loop signal or queue. If the window's object tree gets interrupted, it signals the main thread that it was interrupted and waits on a signal from the main thread with information about what to do (continue this branch or abort). The main thread then presents the document-modal window and signals the process thread after the user chooses what to do.
This may be really over-complicated for what you need, however. In that case, my recommendation would be to just go with the deprecated usage, but it really depends on your user requirements.
Swift 5:
extension NSAlert {
/// Runs this alert as a sheet.
/// - Parameter sheetWindow: Parent window for the sheet.
func runSheetModal(for sheetWindow: NSWindow) -> NSApplication.ModalResponse {
beginSheetModal(for: sheetWindow, completionHandler: NSApp.stopModal(withCode:))
return NSApp.runModal(for: sheetWindow)
}
}
here is my answer:
Create a global class variable 'NSInteger alertReturnStatus'
- (void)alertDidEndSheet:(NSWindow *)sheet returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo
{
[[sheet window] orderOut:self];
// make the returnCode publicly available after closing the sheet
alertReturnStatus = returnCode;
}
- (BOOL)testSomething
{
if(2 != 3) {
// Init the return value
alertReturnStatus = -1;
NSAlert *alert = [[[NSAlert alloc] init] autorelease];
[alert addButtonWithTitle:#"OK"];
[alert addButtonWithTitle:#"Cancel"];
[alert setMessageText:NSLocalizedString(#"Warning", #"warning")];
[alert setInformativeText:#"Press OK for OK"];
[alert setAlertStyle:NSWarningAlertStyle];
[alert setShowsHelp:NO];
[alert setShowsSuppressionButton:NO];
[alert beginSheetModalForWindow:[self window] modalDelegate:self didEndSelector:#selector(alertDidEndSheet:returnCode:contextInfo:) contextInfo:nil];
// wait for the sheet
NSModalSession session = [NSApp beginModalSessionForWindow:[alert window]];
for (;;) {
// alertReturnStatus will be set in alertDidEndSheet:returnCode:contextInfo:
if(alertReturnStatus != -1)
break;
// Execute code on DefaultRunLoop
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
beforeDate:[NSDate distantFuture]];
// Break the run loop if sheet was closed
if ([NSApp runModalSession:session] != NSRunContinuesResponse
|| ![[alert window] isVisible])
break;
// Execute code on DefaultRunLoop
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
beforeDate:[NSDate distantFuture]];
}
[NSApp endModalSession:session];
[NSApp endSheet:[alert window]];
// Check the returnCode by using the global variable alertReturnStatus
if(alertReturnStatus == NSAlertFirstButtonReturn) {
return YES;
}
return NO;
}
return YES;
}
Hope it'll be of some help,
Cheers
--Hans
This is the version of Laurent, et al., above, translated into Swift 1.2 for Xcode 6.4 (latest working version as of today) and tested in my app. Thanks to all those who contributed to make this work! The standard documentation from Apple gave me no clues as to how go about this, at least not anywhere that I could find.
One mystery remains to me: why I had to use the double exclamation point in the final function. NSApplication.mainWindow is supposed to be just an optional NSWindow (NSWindow?), right? But the compiler gave the error shown until I used the second '!'.
extension NSAlert {
func runModalSheetForWindow( aWindow: NSWindow ) -> Int {
self.beginSheetModalForWindow(aWindow) { returnCode in
NSApp.stopModalWithCode(returnCode)
}
let modalCode = NSApp.runModalForWindow(self.window as! NSWindow)
return modalCode
}
func runModalSheet() -> Int {
// Swift 1.2 gives the following error if only using one '!' below:
// Value of optional type 'NSWindow?' not unwrapped; did you mean to use '!' or '?'?
return runModalSheetForWindow(NSApp.mainWindow!!)
}
}
Unlike Windows I don't believe there's a way to block on modal dialogs. The input (e.g. the user clicking a button) will be processed on your main thread so there's no way of blocking.
For your task you will either have to pass the message up the stack and then continue where you left off.
When one object fails, stop processing the objects in the tree, make a note of which object failed (assuming that there is an order and you can pick up where you left off), and throw up the sheet. When the user dismisses the sheet, have the didEndSelector: method start processing again from the object that it left off with, or don't, depending on the returnCode.
- (bool) windowShouldClose: (id) sender
{// printf("windowShouldClose..........\n");
NSAlert *alert=[[NSAlert alloc ]init];
[alert setMessageText:#"save file before closing?"];
[alert setInformativeText:#"voorkom verlies van laatste wijzigingen"];
[alert addButtonWithTitle:#"save"];
[alert addButtonWithTitle:#"Quit"];
[alert addButtonWithTitle:#"cancel"];
[alert beginSheetModalForWindow: _window modalDelegate: self
didEndSelector: #selector(alertDidEnd: returnCode: contextInfo:)
contextInfo: nil];
return false;
}
You can use dispatch_group_wait(group, DISPATCH_TIME_FOREVER);:
dispatch_group_t group = dispatch_group_create();
dispatch_group_enter(group);
NSAlert *alert = [[NSAlert alloc] init];
[alert setMessageText:#"alertMessage"];
[alert addButtonWithTitle:#"Cancel"];
[alert addButtonWithTitle:#"Ok"];
dispatch_async(dispatch_get_main_queue(), ^{
[alert beginSheetModalForWindow:progressController.window completionHandler:^(NSModalResponse returnCode) {
if (returnCode == NSAlertSecondButtonReturn) {
// do something when the user clicks Ok
} else {
// do something when the user clicks Cancel
}
dispatch_group_leave(group);
}];
});
dispatch_group_wait(group, DISPATCH_TIME_FOREVER);
//you can continue your code here
Hope that helps.