IOS多个UIView添加点击

Question

刚刚接触IOS开发，遇到以下问题想不通，希望高手给予指导。我给sendView、 payVIew、receiverView、 commentView设置点击事件，为什么
UITapGestureRecognizer * singleRecognizer = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(viewClick:)];
singleRecognizer.numberOfTapsRequired = 1;
[self.sendView addGestureRecognizer:singleRecognizer];
[self.payVIew addGestureRecognizer:singleRecognizer];
[self.receiverView addGestureRecognizer:singleRecognizer];
[self.commentView addGestureRecognizer:singleRecognizer];
只有commentView能够响应点击事件，其他的三个UIView都无法响应点击事件，但是我要是改成

UITapGestureRecognizer * singleRecognizer = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(viewClick:)];
singleRecognizer.numberOfTapsRequired = 1;
[self.sendView addGestureRecognizer:singleRecognizer];

UITapGestureRecognizer * singleRecognizer1 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(viewClick:)];
singleRecognizer1.numberOfTapsRequired = 1;
[self.payVIew addGestureRecognizer:singleRecognizer1];

UITapGestureRecognizer * singleRecognizer2 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(viewClick:)];
singleRecognizer2.numberOfTapsRequired = 1;
[self.receiverView addGestureRecognizer:singleRecognizer2];

UITapGestureRecognizer * singleRecognizer3 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(viewClick:)];
singleRecognizer3.numberOfTapsRequired = 1;
[self.commentView addGestureRecognizer:singleRecognizer3];
    就可以了呢？希望好心人能够给我这个新手指点迷津

Answer 1

第一种用法相当于创建了一个点击手势 给四个View赋值 它只可以赋值给一个对象 先给sendView赋值 一直执行代码 最后赋值给了commentView，也就是前三个并没有赋值上了，第二种写法就是创建了4个点击手势分别给四个View赋值，就咩有问题了