how to detect number of touches on the uiview in iphone sdk

in my app, when the user touches on the view ,i am showing an UIImageView there and i drag and

drop the image from another UIImageView to that touched UIImageView.

But the problem is that, only the recent touched UIImageView is activated. i mean ,when i

click 3 times then shows 3 UIImageViews but only the last is activated and accept the another

image.

How can i make all touched UIImageViews are activated .. Any开发者_StackOverflow body help on this..

Thanks in advance.

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You should read Apples documentation on the responder chain and event handling. The key UIView method here is

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event 

This method traverses the view hierarchy by sending the pointInside:withEvent: message to each subview to determine which subview should receive a touch event. If pointInside:withEvent: returns YES, then the subview’s hierarchy is traversed; otherwise, its branch of the view hierarchy is ignored. You rarely need to call this method yourself, but you might override it to hide touch events from subviews.

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You should try this: Where there is your UIView (Or a view):

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapped:)];
tapGesture.numberOfTapsRequired = 1;//number of tap
[view addGestureRecognizer:tapGesture];

The selector:

-(void)tapped:(UITapGestureRecognizer *)sender {
NSLog(@"Pressed");
}