1. UITapGestureRecognizer（点按）基本介绍
2. UITapGestureRecognizer应用
//创建手势识别器对象
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] init];
//设置手势识别器对象的具体属性
// 连续敲击2次
tap.numberOfTapsRequired = 2;
// 需要2根手指一起敲击
tap.numberOfTouchesRequired = 2;
//添加手势识别器到对应的view上
[self.iconView addGestureRecognizer:tap];
//监听手势的触发
[tap addTarget:self action:@selector(tapIconView:)];
3. UITapGestureRecognizer属性
// 要求的点击次数，默认为1次
@property (nonatomic) NSUInteger numberOfTapsRequired;
// 要求的手指触摸数量，默认为1个
@property (nonatomic) NSUInteger numberOfTouchesRequired __TVOS_PROHIBITED;
