I would like to know how to access a UIScrollView using a subview UILabel.
I have tried to access the UIScrollView using .superview; however I am now receiving an error
No visible @interface for 'UIView' declares the selector 'scrollRectToVisible:animated:'
The code I am using looks like this
- (void) SymbolButtonPressed:(NSString *)selectedString {
UILabel *label = (UILabel *)[self.view viewWithTag:currentlySelectedTag];
// perform scrolling here, figure out what view your uilable is in.
float newPosition = label.superview.contentOffset.x+label.frame.size.width;
CGRect toVisible = CGRectMake(newPosition, 0, label.superview.frame.size.width, label.superview.frame.size.height);
[label.superview scrollRectToVisible:toVisible animated:YES];
}
The superview of a UILabel is of type UIView and so does not respond to the method you are trying to call. You can cast the superview as a UIScrollView so that Xcode can see the methods and properties you are trying to access. You should also check if the superview responds to the method.
if([label.superview respondsToSelector:@selector(scrollRectToVisible:animated:)]) {
[(UIScrollView *)label.superview scrollRectToVisible:toVisible animated:YES];
}
Given your sample code you will also need to cast the superview to get contentOffset
float newPosition = ((UIScrollView *)label.superview).contentOffset.x+label.frame.size.width;