Trouble with gesture recognizers in subviews - objective-c

Question

I'm having a rather basic problem, I've looked around (here, google, etc) and haven't found a solution for this:
In my View Controller's viewDidLoad, I have this:
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(myfunc:)];
//I have a UIScrollView named "containerView"
//here's some code that creates an UIView in a variable named "myView"
//this works fine, I can see "myView" when I run it
[containerView addSubview:myView];
[myView addGestureRecognizer:longPress];
and then I have this function in the same class:
- (void)myfunc:(UIRotationGestureRecognizer *)recognizer
{
NSLog(#"hola!"); //never runs
}
The call to NSLog never runs. What am I doing wrong?
EDIT
Some extra info: it seems no touch events are ever sent to the subview. However, I tried adding an UIView with a button inside, all in the UIScrollView, and the button receives the touch event just fine, so the problem is only with programmatically added subviews.

Answer 1

Strangely enough, adding a "container" UIView inside the UIScrollView, and then the other subviews inside this container, made it work. Now touch events are sent to the subviews.

Answer 2

How can a superview interecept a touch sequence before any of its subviews?
TLDR:
[containerView setCanCancelContentTouches:NO];
do it just as you add the gesture recogniser to the scroll view.
also look into
[containerView setDelaysContentTouches:NO];
If the above behaviour isn't quite right.
for more info:
http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIScrollView_Class/Reference/UIScrollView.html

Answer 3

I think on myFunc you must do somethings like that:
switch (reconiger.state)
{
case UIGestureRecognizerBegin:
//Do something when start recognizer
break;
case UIGestureRecognizerEnd:
//Do something when end recognizer
break;
}