UITouch Event on Animated UIImagevIew - image

Question

I am using the Snowfall sample code which drops UImages from the top of the screen. I want to detect a Touch on the UIImageview and update a label. If i create a single UIImageView in IBOutlet and connect it to the touch event the label is updated correctly. But when I try to apply it to the falling UIImageView it does not work. Here is what I have so far:
- (void)viewDidLoad {
[super viewDidLoad];
score = 0;
self.view.backgroundColor = [UIColor colorWithRed:0.5 green:0.5 blue:1.0 alpha:1.0];
flakeImage = [UIImage imageNamed:#"flake.png"];
[NSTimer scheduledTimerWithTimeInterval:(0.5) target:self selector:#selector(onTimer) userInfo:nil repeats:YES];
}
- (void)onTimer
{
flakeView = [[UIImageView alloc] initWithImage:flakeImage];
flakeView.opaque = YES;
flakeView.userInteractionEnabled = YES;
flakeView.multipleTouchEnabled = YES;
int startX = round(random() % 320);
int endX = round(random() % 320);
double scale = 1 / round(random() % 100) + 1.0;
double speed = 1 / round(random() % 100) + 1.0;
flakeView.frame = CGRectMake(startX, -100.0, 25.0 * scale, 25.0 * scale);
[self.view addSubview:flakeView];
[self.view bringSubviewToFront:flakeView];
[UIView beginAnimations:nil context:flakeView];
[UIView setAnimationDuration:5 * speed];
flakeView.frame = CGRectMake(endX, 500.0, 25.0 * scale, 25.0 * scale);
[UIView setAnimationDidStopSelector:#selector(onAnimationComplete:finished:context:)];
[UIView setAnimationDelegate:self];
[UIView commitAnimations];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
if ([touch view] == flakeView)
{
NSLog(#"tag %#",touch);
score = score + 1;
lbl1.text = [NSString stringWithFormat:#"%i", score];
}
}

Answer 1

Animations typically disable touch handling so you have to use:
animateWithDuration:delay:options:animations:completion
to set the options to receive touches.
http://developer.apple.com/library/IOs/#documentation/WindowsViews/Conceptual/ViewPG_iPhoneOS/AnimatingViews/AnimatingViews.html#//apple_ref/doc/uid/TP40009503-CH6-SW1
IIRC the option you want is: UIViewAnimationOptionAllowUserInteraction Look for UIViewAnimationOptions in the above doc for the full list.