cell侧滑手势

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeLeft)];
    swipe.delaysTouchesBegan = YES;
    swipe.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.contentView addGestureRecognizer:swipe];
    
    
- (void)swipeLeft {
    if([self.delegate respondsToSelector:@selector(swipeLeft)]) {
        [self.delegate swipeLeft];
    }
}