iphone之数据加载界面

from：http://blog.sina.com.cn/s/blog_4adf31ea0100qvp1.html

代码如下：

-(void) action: (UIBarButtonItem *) item

{

 

loadingview = [[UIAlertView alloc] initWithTitle:nil 

   message: @"请稍候... ..."

   delegate: self

  cancelButtonTitle: nil

  otherButtonTitles: nil];

//创建等待图标

UIActivityIndicatorView *activityView = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];

activityView.frame = CGRectMake(120.f, 48.0f, 37.0f, 37.0f);

[loadingview addSubview:activityView];

[activityView startAnimating];

[activityView release];

[loadingview show];

 

[NSThread detachNewThreadSelector:@selector(CloseLoading) toTarget:selfwithObject:nil];

 

}

-(void) CloseLoading

{

//等待3秒

[NSThread sleepForTimeInterval:3];

 

//删除等待视图

[loadingview dismissWithClickedButtonIndex:0 animated:YES];

}