给ImageView添加点击事件
1: cell.pictureView.userInteractionEnabled = YES;
2: UITapGestureRecognizer *gr = [[UITapGestureRecognizer alloc]initWithTarget:cell action:@selector(displayPicture:)];
3: gr.numberOfTapsRequired = 1;
4: gr.numberOfTouchesRequired = 1;
5: [cell.pictureView addGestureRecognizer:gr ];
1: -(void)displayPicture:(UITapGestureRecognizer*)gr{
2: NSLog(@"%s----%@",__func__,gr);
3: [self.delegate displayPic:self.pictureView.image];
4: }