在view上加了UITapGestureRecognizer之后，这个view上的所有触摸事件都被UITapGestureRecognizer给吸收了，所以要解决这个bug，要给这个手势代理加一些事件过滤，对button事件就不要拦截独吞了。代码如下:

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(cilck)];
tapGesture.delegate = self;
[friendView addGestureRecognizer:tapGesture];

pragma mark UIGestureRecognizerDelegate

• (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{

  if ([touch.view isKindOfClass:[UIButton class]]) {
  //放过button点击拦截
  return NO;
  }else{
  return YES;
  }

}