BackgroundImage of UIButton sometimes did not change with touchUpInside event

Question

The UIButton is set as following code:

UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 27, 27)];
[btn setBackgroundImage:[UIImage imageNamed:@"imgUp.png"] forState:UIControlStateNormal];
[btn setBackgroundImage:[UIImage imageNamed:@"imgDown.png"] forState:UIControlStateHighlighted];
[btn addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];

If I touch the btw quickly, the imgDown.png will not appear but the action btnPressed: is fired. How could it be fixed? Any help is appreciated:)

visit this question might be usefull for you http://stackoverflow.com/questions/1072698/changing-image-on-uibutton-when-user-presses-that-button-on-an-iphone — Nitin Gohel, Sep 27 '12 at 08:42
Have you tried with `forState:UIControlStateSelected` instead highlighted? — Mat, Sep 27 '12 at 08:43
just try this [btn setBackgroundImage:[UIImage imageNamed:@"imgDown.png"] forState:UIControlStateSelected]; — Paras Joshi, Sep 27 '12 at 08:45

score 1 · Answer 1 · edited Sep 27 '12 at 08:49

1

Add this line in your code:

[btn setBackgroundImage:[UIImage imageNamed:@"imgDown.png"] forState:UIControlStateSelected];

edited Sep 27 '12 at 08:49

Adinia

3,722
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answered Sep 27 '12 at 08:47

Paras Joshi

20,427
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score 0 · Answer 2 · answered Sep 27 '12 at 08:43

0

You should call the setHiglighted: method for the button (btn) inside of btnPressed: function.

answered Sep 27 '12 at 08:43

user1111278

126
4

score 0 · Accepted Answer · answered Sep 27 '12 at 09:19

The following code can solve the problem.

-(void)btnPressedDelay{

    //original code in btnPressed: method
}

- (void) btnPressed:(id)sender
{    

    [self performSelector:@selector(btnPressedDelay) withObject:nil afterDelay:0];
// 0 did the magic here

}

score 0 · Answer 4 · edited Apr 14 '14 at 12:30

0

its working fine i will tested it pls check your images and try it :

UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 27, 27)];
[button setBackgroundImage:[UIImage imageNamed:@"rainy.jpg"] forState:UIControlStateNormal];
[button setBackgroundImage:[UIImage imageNamed:@"Icon.png"] forState:UIControlStateHighlighted];
[button addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
[self.view button];

edited Apr 14 '14 at 12:30

swalkner

16,679
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answered Sep 27 '12 at 11:05

Sameer

1

If btnPressed: did nothing it may work fine. Here in mine code it will modal a viewcontroller. One solution is post by myself. – lu yuan Sep 27 '12 at 11:20

BackgroundImage of UIButton sometimes did not change with touchUpInside event

4 Answers4