我怎样才能在我的应用程序中简单地使用进度视图

How can i simply used progress view in my app

我正在尝试使用以下代码将图像从我的应用程序保存到相册:

 -(void)download:(UIButton *)downloadbtn{

    j=320*downloadbtn.tag;

    selectedIndex=downloadbtn.tag;

    NSData *data=[NSData dataWithContentsOfURL:[NSURL URLWithString:[live_god_img objectAtIndex:selectedIndex]]];

    UIImage*img=[UIImage imageWithData:data];

    UIImageWriteToSavedPhotosAlbum(img, self, nil, nil);

    UIAlertView*alert=[[UIAlertView alloc]initWithTitle:@"Success..!" message:@"Image Saved to the Photos" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];

    [alert show];

}

当图像保存到相册时,会显示一个警告视图,但我想在图像保存到相册时显示一个进度视图。我不知道如何使用UIProgressView。我该怎么做?

完成本教程first

你可以在你的方法中这样尝试。

- (IBAction)startProgress:(id)sender
    {
     progressValue = 0.0f;
     [self increaseProgressValue];
   }

-(void)increaseProgressValue
   {
   if(progressView.progress<1)
      {
    progressValue = progressValue+0.1;
    progressView.progress = progressValue;

   [self performSelector:@selector(increaseProgressValue) withObject:self afterDelay:0.2];
     }
  }