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以下代码用于显示下载进度。操作单显示,执行下载的代码在不同的线程上运行,并随着进程更新进度。我已经使用调试器确认了这一点。问题是实际的进度条从不显示在动作表上。每次更新后我都会延迟1秒,以确保我不会错过它。有没有什么我失踪至于设置酒吧?进度条不显示在操作单上
self.pActionSheet=[[[UIActionSheet alloc] initWithTitle:@"Downloading Alerts. Please Wait.\n\n\n" delegate:nil cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil] autorelease];
pBarView=[[UIProgressView alloc] initWithFrame:CGRectMake(0.0f,40.0f, 220.0f, 90.0f)];
[pBarView setProgressViewStyle:UIProgressViewStyleDefault];
[pActionSheet addSubview:pBarView];
[pBarView release];
[pBarView setProgress:0.0f];
[pActionSheet showInView:self.view];
pBarView.center=CGPointMake(pActionSheet.center.x,pActionSheet.center.y);