长按保存图片到本地

`objc
//创建UILongPressGestureRecognizer UILongPressGestureRecognizer*longPG = [[UILongPressGestureRecognizeralloc]initWithTarget:selfaction:@selector(longAction:)
]; [selfaddGestureRecognizer:longPG];

}

//长按触发的方法
-(void)longAction:(UILongPressGestureRecognizer*)longPG
{

if(longPG.state==UIGestureRecognizerStateBegan)
{

   //创建UIAlertView对象
   UIAlertView*alert = [[UIAlertViewalloc]initWithTitle:@"提示"message:@"是否保存图片到本地"delegate:selfcancelButtonTitle:@"取消"otherButtonTitles:@"确定",nil];
   //调用show方法
    [alertshow];
   //释放
    [alertrelease];


}

}

• (void)alertView:(UIAlertView*)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
  {
  if(buttonIndex ==1) {

  //UIImage写入本地的方法
  UIImageWriteToSavedPhotosAlbum(self.photo.image,nil,nil,nil);
  
  //创建UIAlertView对象
  UIAlertView*alert = [[UIAlertViewalloc]initWithTitle:@"提示"message:@"图片已保存成功"delegate:selfcancelButtonTitle:nilotherButtonTitles:nil];
  //调用show方法
   [alertshow];
  //释放
   [alertrelease];
  
  dispatch_after(dispatch_time(DISPATCH_TIME_NOW,
  

  (int64_t)(1.0f*NSEC_PER_SEC)),dispatch_get_main_queue(), ^{

      [alertdismissWithClickedButtonIndex:0animated:YES];
  });
  

  }

  }