//方式1.直接在View上show  HUD = [[MBProgressHUD showHUDAddedTo:self.view animated:YES] retain];  HUD.delegate = self;    //常用的设置  //小矩形的背景色  HUD.color = [UIColor clearColor];//这儿表示无背景  //显示的文字  HUD.labelText = @"Test";  //细节文字  HUD.detailsLabelText = @"Test detail";  //是否有庶罩  HUD.dimBackground = YES;  [HUD hide:YES afterDelay:2];    //只显示文字  MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];  hud.mode = MBProgressHUDModeText;  hud.labelText = @"Some message...";  hud.margin = 10.f;  hud.yOffset = 150.f;  hud.removeFromSuperViewOnHide = YES;  [hud hide:YES afterDelay:3];    //方式2.initWithView  //use block  HUD = [[MBProgressHUD alloc] initWithView:self.view];  [self.view addSubview:HUD];  HUD.labelText = @"Test";  [HUD showAnimated:YES whileExecutingBlock:^{      NSLog(@"%@",@"do somethings....");      [self doTask];  } completionBlock:^{      [HUD removeFromSuperview];      [HUD release];          }];    //圆形进度条  HUD = [[MBProgressHUD alloc] initWithView:self.view];  [self.view addSubview:HUD];  HUD.mode = MBProgressHUDModeAnnularDeterminate;  HUD.delegate = self;  HUD.labelText = @"Loading";  [HUD showWhileExecuting:@selector(myProgressTask) onTarget:self withObject:nil animated:YES];    //自定义view  HUD = [[MBProgressHUD alloc] initWithView:self.view];  HUD.customView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"37x-Checkmark.png"]] autorelease];  // Set custom view mode  HUD.mode = MBProgressHUDModeCustomView;  HUD.delegate = self;  HUD.labelText = @"Completed";  [HUD show:YES];  [HUD hide:YES afterDelay:3];