Touch on UISlider prevents scrolling of UIScrollView

Question

I have a (vertical) UISlider inside a UIScrollview. I\'d like to be able to change the value of the slider, and, without lifting my finger, scroll the scrollview left or right.

Answer 1

You need to set delaysContentTouches as NO and prevent for UISlider objects to scroll, Check below code.

mySlider.delaysContentTouches = NO;

- (BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view {
    if ([view isKindOfClass:[UISlider class]])
    {
        UITouch *touchEvent = [[event allTouches] anyObject];
        CGPoint locationEvent = [touchEvent locationInView:view];
        CGRect thumbRect;
        UISlider *mySlide = (UISlider*) view;
        CGRect trackRect = [mySlide trackRectForBounds:mySlide.bounds];
        thumbRect = [mySlide thumbRectForBounds:mySlide.bounds trackRect:trackRect value:mySlide.value];
        if (CGRectContainsPoint(thumbRect, locationEvent))
            return YES;
    }
    return NO;
}