// 显示指示器
MBProgressHUD *HUD = [MBProgressHUD showHUDAddedTo:[[UIApplication sharedApplication].windows objectAtIndex:1] animated:YES];
[self.view.window addSubview:HUD];
HUD.labelText = @“正在加载中...”;
加载完成后，调用[HUD hide:YES];隐藏
ios 指示器MBProgressHUD 的使用,布布扣,bubuko.com
原文：http://blog.csdn.net/alincexiaohao/article/details/38497143