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iOS can not detect a touch for UIImageView, scrollView
- Thread starter tranvutuan
- Start date
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I can easily see you neglected to show us the right panel, namely the connections tab.
Edit:
Although wouldn't it be a lot easier to just use a UIButton? You can assign an image to a button so that visually it looks the same as a UIImageView, but it comes with the ability to detect touches "built-in", that is, without you having to write any code to have it detect touches.
Edit:
Although wouldn't it be a lot easier to just use a UIButton? You can assign an image to a button so that visually it looks the same as a UIImageView, but it comes with the ability to detect touches "built-in", that is, without you having to write any code to have it detect touches.
Yeah you are rite.. just gave it a try and it is easier then.. However, i would like to try out with UIImageView after all.By the way, I did attach an img with connections tab
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Well, you've shown the connections for a newly-added button. But what about your images?
I think showing connections with your controller would be better... that way we'd see all the connections between it and your buttons and images.
Others are UIImageView and they are not supported for touch event.. Therefore, I have to add in the codes like below
Code:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
myScrollView.contentSize = CGSizeMake(500,0);
UITapGestureRecognizer *touch;
touch = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(test:)];
[myImgView1 setUserInteractionEnabled:TRUE];
[myImgView2 setUserInteractionEnabled:TRUE];
touch.numberOfTapsRequired = 1;
[myImgView2 addGestureRecognizer:touch];
[myImgView1 addGestureRecognizer:touch];
myImgView1.tag = 8 ;
myImgView2.tag = 9 ;
[myButton setImage:[UIImage imageNamed:@"dresses.png"] forState:UIControlStateNormal];
[myButton setImage:[UIImage imageNamed:@"dresses.png"] forState:UIControlStateHighlighted];
}
- (void) test:(UIGestureRecognizer *)sender
{
UIImageView *myImg = (UIImageView*)sender.view;
if (myImg.tag == 8 ) {
//NSLog(@"fdfdfdfdfdfdfdf %d",((UIImageView*)id).tag);
NSLog(@"JUST TOUCHEDDDDDD MYIMGVIEW1");
[myBigImgView setImage:[UIImage imageNamed:@"button"]];
}
else if (myImg.tag == 9 )
NSLog(@"JUST TOUCHEDDDDDD MYIMGVIEW2");
[myBigImgView setImage:[UIImage imageNamed:@"dresses"]];
}Please use the "Edit" button at the bottom of your post to add something. Do not make two back to back posts.
Regarding why your code isn't being called, you don't appear to have a delegate set up for your gesture recognizer. I'm not sure if that'll fix it but that's something I'm noticing...
Edit: (See, you should edit like this?)
Nevermind, you don't need a delegate... still looking...
Found this in the class reference:
So maybe your issue is that the method must be handleGesture: instead of test:?
Other thing, do you know whether test: is being called at all? It looks to me like if test: is called and the view's tag was neither 8 nor 9, it won't do anything at all. Either add an NSLog that lets you know it's being called, or set a breakpoint (a breakpoint would be quicker and easier.)
Regarding why your code isn't being called, you don't appear to have a delegate set up for your gesture recognizer. I'm not sure if that'll fix it but that's something I'm noticing...
Edit: (See, you should edit like this?)
Nevermind, you don't need a delegate... still looking...
Found this in the class reference:
So maybe your issue is that the method must be handleGesture: instead of test:?
Other thing, do you know whether test: is being called at all? It looks to me like if test: is called and the view's tag was neither 8 nor 9, it won't do anything at all. Either add an NSLog that lets you know it's being called, or set a breakpoint (a breakpoint would be quicker and easier.)
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Yes, they are. Anyways, not sure why you would make so much extra work for yourself as you seem to be trying to duplicate the functionality that UIButton already has built-in.
test method is being called but only for the latest UIImageView which invokes test
Code:
[myImgView2 addGestureRecognizer:touch];
[myImgView1 addGestureRecognizer:touch];
Code:
[myImgView1 addGestureRecognizer:touch];
[myImgView2 addGestureRecognizer:touch];Yeah thanks for pointing out then. So what should we do if right now we are having 20 UIImageViews and we have to tell which one has been invoked. Does it sound like we are going to have 20 touches and each of them is mapped to each UIImageView then..... ?
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Alright, I think I have to go for a UIButton rather then UIImageView.Thanks for all your helps...