MBProgressHUD的使用

 //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];

代理方法：

 #pragma mark -
 #pragma mark HUD的代理方法,关闭HUD时执行
 -(void)hudWasHidden:(MBProgressHUD *)hud
 {
     [hud removeFromSuperview];
     [hud release];
     hud = nil;
 }

二个task

   -(void) doTask{
     //你要进行的一些逻辑操作
     sleep(2);
   }

   -(void) myProgressTask{
        float progress = 0.0f;
 while (progress < 1.0f) {
     progress += 0.01f;
     HUD.progress = progress;
     usleep(50000);
 }

   }