how to track double tap event on Uitableview

[Ajeet]

Hi,
i am new bie in iphone development. I am facing a problem in tracking a double tap event on uitable view.

In my application there is uitable view in which I am using Uitable view cell for making as per requirment. I have written touch event in the subview subcell.m
the code is like this
- (void)touchesBeganNSSet *)touches withEventUIEvent *)event
{
NSUInteger numTaps = [[touches anyObject] tapCount];
if (numTaps < 2) {
//[self performSelector:@selector(doThis) withObject:nil afterDelay: 0.5 ];

[self.nextResponder touchesEnded:touches withEvent:event];
} else {
if(numTaps == 2) {

NSLog(@"2 taps - ");

tapcounter=@"today";
[NSObject cancelPreviousPerformRequestsWithTarget:self];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gestureDidSwipeRight) name:@"eventName" object:nil];
[self performSelector:@selector(doubleTap) withObject:nil afterDelay: 0.5 ];
}

if(numTaps == 3){
NSLog(@"3 taps - Previous");

[NSObject cancelPreviousPerformRequestsWithTarget:self];

// [self doSomethingElseCompletely];

}
}


[super touchesBegan:touches withEvent:event];
}


-(void)gestureDidSwipeRight
{
NSLog(@"notification found");
}

Its working fine and showing the notification. But I want this notification in super view that is the main tableview.

Is there any other way to track the double tap event?
Thanks in advance.

[Duncan C]

Originally Posted by Ajeet

Hi,
i am new bie in iphone development. I am facing a problem in tracking a double tap event on uitable view.

In my application there is uitable view in which I am using Uitable view cell for making as per requirment. I have written touch event in the subview subcell.m
the code is like this
- (void)touchesBeganNSSet *)touches withEventUIEvent *)event
{
NSUInteger numTaps = [[touches anyObject] tapCount];
if (numTaps < 2) {
//[self performSelector:@selector(doThis) withObject:nil afterDelay: 0.5 ];

[self.nextResponder touchesEnded:touches withEvent:event];
} else {
if(numTaps == 2) {

NSLog(@"2 taps - ");

tapcounter=@"today";
[NSObject cancelPreviousPerformRequestsWithTarget:self];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gestureDidSwipeRight) name:@"eventName" object:nil];
[self performSelector:@selector(doubleTap) withObject:nil afterDelay: 0.5 ];
}

if(numTaps == 3){
NSLog(@"3 taps - Previous");

[NSObject cancelPreviousPerformRequestsWithTarget:self];

// [self doSomethingElseCompletely];

}
}


[super touchesBegan:touches withEvent:event];
}


-(void)gestureDidSwipeRight
{
NSLog(@"notification found");
}

Its working fine and showing the notification. But I want this notification in super view that is the main tableview.

Is there any other way to track the double tap event?
Thanks in advance.

You can probably cheat and use the table view delegate method -didSelectRowAtIndexPath.

Write code in that method to record the time of a tap and check for a second tap within a short interval (~0.3 - 0.5 seconds). If you get two didSelectRowAtIndexPath within the time interval, treat it as a double-tap.

I use this method in one of the apps I've written and it works pretty well.

Failing that, you will probably have to pass a pointer to you table view controller to your custom cell and have the cell's touch handling method send a message to the table view controller.


Regards,

Duncan C
WareTo

[Ajeet]

Thanks for your reply. It will be very helpfull if you post some code what you suggested to do.

Thanks again.

Originally Posted by Duncan C

You can probably cheat and use the table view delegate method -didSelectRowAtIndexPath.

Write code in that method to record the time of a tap and check for a second tap within a short interval (~0.3 - 0.5 seconds). If you get two didSelectRowAtIndexPath within the time interval, treat it as a double-tap.

I use this method in one of the apps I've written and it works pretty well.

Failing that, you will probably have to pass a pointer to you table view controller to your custom cell and have the cell's touch handling method send a message to the table view controller.


Regards,

Duncan C
WareTo