手势识别

注册: 

    UISwipeGestureRecognizer *recognizer;  
    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];  
    [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];  
    [[self view] addGestureRecognizer:recognizer];  
    [recognizer release];

 处理:

- (void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer{  
    if (recognizer.direction==UISwipeGestureRecognizerDirectionLeft) {  
        NSLog(@"left");
    }
}

 移出: 

    for (UISwipeGestureRecognizer *recognizer in [[self view] gestureRecognizers]) {
        [[self view] removeGestureRecognizer:recognizer];
    }