Detectar Tap & amp; Mantener en celdas UITableView

Question

¿Cómo detectamos un toque & amp; espera un UITableViewCell ?

Answer 1

En iOS 3.2 o posterior puede usar UILongPressGestureRecognizer

Answer 2

Aquí está el código levantado directamente de mi aplicación. Debe agregar estos métodos (y un miembro booleano _cancelTouches) a una clase que deriva de UITableViewCell.

-(void) tapNHoldFired {
    self->_cancelTouches = YES;
   // DO WHATEVER YOU LIKE HERE!!!
}
-(void) cancelTapNHold {
    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(tapNHoldFired) object:nil];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    self->_cancelTouches = NO;
    [super touchesBegan:touches withEvent:event];
    [self performSelector:@selector(tapNHoldFired) withObject:nil afterDelay:.7];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    [self cancelTapNHold];
    if (self->_cancelTouches)
        return;
    [super touchesEnded:touches withEvent:event];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    [self cancelTapNHold];
    [super touchesMoved:touches withEvent:event];
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    [self cancelTapNHold];
    [super touchesCancelled:touches withEvent:event];
}

Answer 3

//Add  gesture to a method where the view is being created. In this example long tap is added to tile (a subclass of UIView):

    // Add long tap for the main tiles
    UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longTap:)];
    [tile addGestureRecognizer:longPressGesture];
    [longPressGesture release];

-(void) longTap:(UILongPressGestureRecognizer *)gestureRecognizer{
    NSLog(@"gestureRecognizer= %@",gestureRecognizer);
    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan) {
        NSLog(@"longTap began");

    }

}

Answer 4

Probablemente debería manejar el evento UIControlTouchDown y, dependiendo de lo que quiera decir con "mantener", dispare un NSTimer que contará un intervalo desde que inició el toque e invalida al disparar o soltar el toque. ( UIControlTouchUpInside y eventos UIControlTouchUpOutside ). Cuando se dispara el temporizador, tiene su " toque & amp; mantener " detectado.