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Hey,

This question relates to using touch methods in a UIScrollView. I am aware of numerous ways to interact with standard UIViews (touchesBegan, touchesMoved, etc), however, these do not work in a UIScrollView.

I have tried several methods to get around this but am getting no joy:

Using gestureRecognizers - great, but do not allow for touches to be tracked (like touchesMoved).

Using a UISubView - Just can't seem to get this working, I would love some insight here. There's a lot of attempts online, but I can't find a decent tutorial.

Here is my current code for the second method:

 
 //Set scrollview to size of image
self.myScrollView.contentSize = CGSizeMake(3072, 2304);
 
//Load image in big rect
UIImageView *myImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0, 3072, 2304)];
 
//set image to pic in bundle
myImageView.image = [UIImage imageNamed:@"dot.jpg"];
 
//make imageview subview of scrollview
[self.myScrollView addSubview: myImageView];
 
//Making subview for touches
CGRect frame  = CGRectMake(0, 0, 3072, 2304);
touchView = [[UIScrollView alloc] initWithFrame:frame];
[self.myScrollView addSubview: touchView];
 
//Allow for 2 touches to move screen
for (UIGestureRecognizer *gestureRecognizer in myScrollView.gestureRecognizers)
{
    if ([gestureRecognizer  isKindOfClass:[UIPanGestureRecognizer class]])
    {
        UIPanGestureRecognizer *panGR = (UIPanGestureRecognizer *) gestureRecognizer;
        panGR.minimumNumberOfTouches = 2;            
    }
} 


Any insight or help would be great!
Posted 20-May-13 6:40am

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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