Want block UIEvent for UIButton which is located on UICollectionViewCell - ios

Question

I'm creating UICollectionView like below.
What I want to do about the UICollectionView is,
Each UICollectionViewCell has UIButton ([cell.contentView addSubview:button];)
UIButton need to handle UIControlEventTouchDown and UIControlEventTouchUpInside
Begin interactiveMovement by Long tap of UICollectionView Cell
Don't want to begin interactiveMovement by Long tap of UIButton. UIButton just handle UIControlEvent assigned at Step 2.
Want to handle (didSelectItemAtIndexPath:) when the area of UICollectionViewCell other than UIButton is tapped.
My problem is that handleLongPress for UICollectionView responds and start interactiveMovement even when long tapping UIButton .
I want to start interactiveMovement only when the area of UICollectionView other than UIButton is tapped.
When UIButton is long tapped, I just want to handle UIConrolEvent assigned to UIButton and don't want UICollectionView to respond.
I'd appreciate if you would have some solution.
My code is like below, thank you.
MyCollectionView : UICollectionView
- (id)init
{
self = [super initWithFrame:CGRectZero collectionViewLayout:[[UICollectionViewFlowLayout alloc] init]];
if (self) {
self.delegate = self;
self.dataSource = self;
--- snip ---
[self addLongPressGesture];
--- snip ---
}
return self;
}
- (void)addLongPressGesture
{
UILongPressGestureRecognizer *gesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self
action:#selector(handleLongPress:)];
[self addGestureRecognizer:gesture];
}
- (void)handleLongPress:(UILongPressGestureRecognizer *)sender
{
CGPoint point = [sender locationInView:sender.view];
NSIndexPath *indexPath = [self indexPathForItemAtPoint:point];
switch (sender.state) {
case UIGestureRecognizerStateBegan:
[self beginInteractiveMovementForItemAtIndexPath:indexPath];
break;
case UIGestureRecognizerStateChanged:
[self updateInteractiveMovementTargetPosition:point];
break;
case UIGestureRecognizerStateEnded:
[self endInteractiveMovement];
break;
default:
[self cancelInteractiveMovement];
break;
}
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
// something to do
}
MyUICollectionViewCell : UICollectionViewCell
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self initButton];
}
return self;
}
- (void)initButton
{
_button = [[UIButton alloc] init];
[_button addTarget:self action:#selector(touchUpButton:) forControlEvents:UIControlEventTouchUpInside];
[_button addTarget:self action:#selector(touchDownButton:) forControlEvents:UIControlEventTouchDown];
--- snip ---
[self addSubview:_button];
}
- (void)touchUpButton:(UIButton *)button
{
// something to do
}
- (void)touchDownButton:(UIButton *)button
{
// something to do
}

Answer 1

Add a transparent UIView below UIButton and add long press to it not to the whole collection view as UIButton is considered a sub-Control of the cell
OR
see the long press point x,y if it's intersects with button's frame return from the method

Answer 2

I've resolved my problem. It my not be a good solution but it's working as I expect.
I've added ButtonBaseView(:UIView) under UIButton and add LongPressGesture on the ButtonBaseView.
The LongPressGesture do nothing as it's action. The role is to block LongPressGesture not to pass the event to UICollectionView.
At the same time, set cancelsTouchesInView=NO to handle TouchUpInside or TouchDragExit
My code is like below,
- (void)addDummyLongTapGesture
{
UILongPressGestureRecognizer *gesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:nil];
gesture.cancelsTouchesInView = NO;
[buttonBaseView addGestureRecognizer:gesture];
}