//设定一个实例变量存储手指之间的其起始距离

@property (assign, nonatomic) CGFloat initialFontSize;

//调用：

 UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizeralloc]

        initWithTarget:selfaction:@selector(doPinch:)];

    [self.viewaddGestureRecognizer:pinch];

//实现方法：

- (void)doPinch:(UIPinchGestureRecognizer *)pinch {

    if (pinch.state == UIGestureRecognizerStateBegan) {

        initialFontSize = label.font.pointSize;//开始时的

    } else {

        label.font = [label.fontfontWithSize:initialFontSize * pinch.scale];

    }

}

//调用：

UITapGestureRecognizer *singleTap =

    [[UITapGestureRecognizeralloc] initWithTarget:self

                                            action:@selector(tap1)];

    singleTap.numberOfTapsRequired = ;

    singleTap.numberOfTouchesRequired = ;

    [self.viewaddGestureRecognizer:singleTap];

    UITapGestureRecognizer *doubleTap =

    [[UITapGestureRecognizeralloc] initWithTarget:self

                                            action:@selector(tap2)];

    doubleTap.numberOfTapsRequired = ;

    doubleTap.numberOfTouchesRequired = ;

    [self.viewaddGestureRecognizer:doubleTap];

    [singleTap requireGestureRecognizerToFail:doubleTap];   //这句是最主要的

    UITapGestureRecognizer *tripleTap =

    [[UITapGestureRecognizeralloc] initWithTarget:self

                                            action:@selector(tap3)];

    tripleTap.numberOfTapsRequired = ;

    tripleTap.numberOfTouchesRequired = ;

    [self.viewaddGestureRecognizer:tripleTap];

    [doubleTap requireGestureRecognizerToFail:tripleTap];

    UITapGestureRecognizer *quadrupleTap =

    [[UITapGestureRecognizeralloc] initWithTarget:self

                                            action:@selector(tap4)];

    quadrupleTap.numberOfTapsRequired = ;

    quadrupleTap.numberOfTouchesRequired = ;

    [self.viewaddGestureRecognizer:quadrupleTap];

    [tripleTap requireGestureRecognizerToFail:quadrupleTap];

//不同点击触发的事件：

- (void)tap1 {

    singleLabel.text = @"Single Tap Detected";

    [selfperformSelector:@selector(eraseMe:)

               withObject:singleLabelafterDelay:1.6f];

}

- (void)tap2 {

    doubleLabel.text = @"Double Tap Detected";

    [selfperformSelector:@selector(eraseMe:)

               withObject:doubleLabelafterDelay:1.6f];

}

- (void)tap3 {

    tripleLabel.text = @"Triple Tap Detected";

    [selfperformSelector:@selector(eraseMe:)

               withObject:tripleLabelafterDelay:1.6f];

}

- (void)tap4 {

    quadrupleLabel.text = @"Quadruple Tap Detected";

    [selfperformSelector:@selector(eraseMe:)

               withObject:quadrupleLabelafterDelay:1.6f];

}

//清除内容

- (void)eraseMe:(UILabel *)label {

    label.text = @"";

}