2 button UIAlertView - which button was pressed?

[trifusion]

Can someone please post a simple example of how to do an alert (UIAlertView) with an OK and Cancel button and how I could simply change detect which button was pressed?

When I read the docs it would appear that I may have to create a UIAlertView delegate and being a Cocoa newbie I am not sure how to go about doing that.

I can display the alert with two buttons using:

		UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Title" message:@"AThe message."  delegate:self cancelButtonTitle:@"button 1" otherButtonTitles: @"button", nil];
		[alert show];
		[alert release];

But how do I determine which button was pressed?

Thanks

Greg

[Scuba]

Look up UIAlertViewDelegate in your documentation, its all in there. Basically you just declare the proper method and it will get called for you passing in the button index.

[Stitch]

This is taken from the UICatalog sample code.

Insure your header file contains the following:

@interface YourViewController : UIViewController <UIAlertViewDelegate>

Then just add the following in the class you need the alert:

- (void)alertOKCancelAction {
  // open a alert with an OK and cancel button
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"UIAlertView" message:@"<Alert message>" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
  [alert show];
  [alert release];
}

and

- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
  // the user clicked one of the OK/Cancel buttons
  if (buttonIndex == 0)
  {
    NSLog(@"ok");
  }
  else
  {
    NSLog(@"cancel");
  }
}

[trifusion]

Stitch,

Thank you for the sample code and how to info, that is just what I was hoping for.

Greg

[reetu.raj]

thank you so much for this info !

[sohel62]

Thank for the post, header file information was useful for me.
I was missing that.

Originally Posted by Stitch

This is taken from the UICatalog sample code.

Insure your header file contains the following:

@interface YourViewController : UIViewController <UIAlertViewDelegate>

Then just add the following in the class you need the alert:

- (void)alertOKCancelAction {
  // open a alert with an OK and cancel button
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"UIAlertView" message:@"<Alert message>" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
  [alert show];
  [alert release];
}

and

- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
  // the user clicked one of the OK/Cancel buttons
  if (buttonIndex == 0)
  {
    NSLog(@"ok");
  }
  else
  {
    NSLog(@"cancel");
  }
}

[youngcoder]

i am doing this:

- (IBAction)showCheat
{
	{
		
		
		UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"Warning!"
														message: @"Are You Sure you Want to See the Answer? Beware it Takes 3 Points Away From your Grade"
													   delegate: self
											  cancelButtonTitle: @"Cancel"
											  otherButtonTitles: @"OK"];
		[alert show];
		[alert release];
	}

	- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
		// the user clicked one of the OK/Cancel buttons
		if (buttonIndex == 0)
		{
			NSLog(@"Ok");
			
			UIAlertView *alerttwo = [[UIAlertView alloc] initWithTitle: @"Warning!"
															   message: solutionText
															  delegate: self
													 cancelButtonTitle: @"Cancel"
													 otherButtonTitles: @"OK"];
			[alerttwo show];
			[alerttwo release];
			
		}
		else
		{
			NSLog(@"Cancel");
		}
	}
		
}

but get the following errors on the red line:
Wrong type argument to unary minus
expected ';' before ':' token

thanks for any suggestions

[anurag]

Originally Posted by youngcoder

i am doing this:

- (IBAction)showCheat
{
	{
		
		
		UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"Warning!"
														message: @"Are You Sure you Want to See the Answer? Beware it Takes 3 Points Away From your Grade"
													   delegate: self
											  cancelButtonTitle: @"Cancel"
											  otherButtonTitles: @"OK"];
		[alert show];
		[alert release];
	}

	- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
		// the user clicked one of the OK/Cancel buttons
.........
		
}

but get the following errors on the red line:
Wrong type argument to unary minus
expected ';' before ':' token

thanks for any suggestions

As far as the above code is concerned, the method - (void)alertViewUIAlertView *)actionSheet clickedButtonAtIndexNSInteger)buttonIndex { is declared inside another method (IBAction) showCheat.

You should add a curly bracket } before the definition of the method -(void)alertView .....

Hope this helps.