Why does my UITableView not respond to touchesBegan? - iphone

Question

I am using this method
- (void)tableView:(UITableView *)tableView touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
if ([myPickerView isFirstResponder] && [touch view] != myPickerView) {
[myPickerView resignFirstResponder];
}
[super touchesBegan:touches withEvent:event];
}
but my tableView does not respond to touches (applied to the view works, but this is covered by the tableView!)
If this is not possible - is there any other possibility to capture "out of window" touches?

Answer 1

There is no such delegate method as tableView:touchesBegan:withEvent:. If you want to override -touchesBegan:withEvent: for your UITableView, you will need to subclass UITableView. Most problems like this are often better implemented with a UIGestureRecognizer. In the above, I'd probably use a UITapGestureRecognizer.

Answer 2

I found the simplest way to do this is to add a gesture recognizer to the UITableViewController's view.
I put this code in the UITableViewController's viewDidLoad:
UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap:)];
[self.view addGestureRecognizer:tap];
And implemented the event handler:
- (void)handleTap:(UITapGestureRecognizer *)recognizer
{
// your code goes here...
}
EDIT:
You could also add the gesture recognizer to the tableview, just change [self.view addGestureRecognizer:tap]; to [self.tableView addGestureRecognizer:tap];

Answer 3

Here is a UITableView subclass solution that worked for me. Make a subclass of UITableView and override hitTest:withEvent: as below:
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
static UIEvent *e = nil;
if (e != nil && e == event) {
e = nil;
return [super hitTest:point withEvent:event];
}
e = event;
if (event.type == UIEventTypeTouches) {
NSSet *touches = [event touchesForView:self];
UITouch *touch = [touches anyObject];
if (touch.phase == UITouchPhaseBegan) {
NSLog(#"Touches began");
}
}
return [super hitTest:point withEvent:event];
}