uibutton, put "target" and "action"

Question

I have the following code that adds a button of type UIBarButtonItem on UIToolbar (postoInfo):

UIImage *faceImage = [UIImage imageNamed:@"informazioni.png"];
UIButton *face = [UIButton buttonWithType:UIButtonTypeCustom];

[face addTarget:self action:@selector(press:) forControlEvents:UIControlEventTouchUpInside];

face.bounds = CGRectMake( 0, 0, 30, 30 );
[face setImage:faceImage forState:UIControlStateNormal];

buttonOne = [[UIBarButtonItem alloc] initWithCustomView:face];

NSArray *buttons = [NSArray arrayWithObjects: buttonOne, nil];

[postoInfo setItems: buttons animated:YES];

I would call a method when the button is pressed, I added, the following line, but does not work:

[face addTarget:self action:@selector(press:) forControlEvents:UIControlEventTouchUpInside];

score 3 · Accepted Answer · edited May 23 '17 at 12:04

3

You should provide correct frame property for UIButton, now it has CGRectZero:

face.frame = CGRectMake( 0, 0, 30, 30 );

Cocoa: What's the difference between the frame and the bounds?

edited May 23 '17 at 12:04

Community

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answered May 27 '12 at 15:50

beryllium

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Perhaps, but I can press the button, but when I press it, the program crashes. – Antilope May 27 '12 at 16:01
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Can you print your press method? Does it have next signatre `-(void)press:(id)sender{}`? – beryllium May 27 '12 at 16:11

score 0 · Answer 2 · answered May 27 '12 at 16:07

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The first thing that comes to my mind is that you are setting the action for the UIButton, but you are initializing the UIBarButtonItem with the UIButton's view. The action isn't saved in the view. You try setting the action for the UIBarButtonItem.

answered May 27 '12 at 16:07

David Skrundz

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I also had thought about it but it was the method signature "press" wrong, thanks! – Antilope May 27 '12 at 16:23

uibutton, put "target" and "action"

2 Answers2