Scrolling in a UIScrollView without triggering touchesCancelled

Question

Overview

I\'m working on an iPhone game whose code I inherited from another developer. The gaming grid is a UIScrollView having a contentSize of 1000x1000. The grid co

Answer 1

- (void)scrollRectToVisible:(CGRect)rect animated:(BOOL)animated 

this might do the trick.... any touchesMoved can trigger a method that would scroll with a velocity propotional to the distance between the center of the screen(or anywhere else) and last recorded position of touch until a touchesEnded.

Answer 2

I had exactly the same problem (and wasted a lot of time). Then I tried to set the cancelsTouchesInView property as soon as possible (I did it in viewDidLoad)... and it worked for me (as shown here)!

- (void)viewDidLoad {
    [super viewDidLoad];
    /* other initializations */
    scrollView.panGestureRecognizer.cancelsTouchesInView = NO;
}

This works in iOS 5. Before iOS 5 you need to go through all the recognizers, find the panGestureRecognizer, and then set the property. So this should be a universal solution:

- (void)viewDidLoad {
    [super viewDidLoad];
    /* other initializations */
    for (UIGestureRecognizer *gesture in scrollView.gestureRecognizers){
        if ([gesture isKindOfClass:[UIPanGestureRecognizer class]]){
        gesture.cancelsTouchesInView = NO;    
    }
}