怎么实现IOS中UIImageView响应点击事件

UIImageView *imgView =[[UIImageView alloc] initWithFrame:CGRectMake(0, 0,320,100)]; 
  imgView.backgroundColor = [UIColor redColor];//因为没有设置image属性，为了显示出图片覆盖区域 
  imgView.userInteractionEnabled=YES; 
  UITapGestureRecognizer *singleTap =[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(onClickImage)]; 
  [imgView addGestureRecognizer:singleTap]; 
  [singleTap release]; 
   

-(void)onClickImage{ 
   
  NSLog(@"图片被点击!"); 
}