dispatch_async 与 NSThread 创建一个任务(更新界面)

Java代码  

1. dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{  
2.       
3.     // Show the HUD in the main tread  
4.     dispatch_async(dispatch_get_main_queue(), ^{  
5.           
6.         // No need to hod onto (retain)  
7.         MBProgressHUD *mbp = [MBProgressHUD showHUDAddedTo:self animated:YES];  
8.         mbp.labelText = @"   解压中,请等待...   ";  
9.     });  
10.     //解压代码  
11.       
12.     //  
13.       
14.     dispatch_async(dispatch_get_main_queue(), ^{  
15.           
16.         [MBProgressHUD hideHUDForView:self animated:YES];  
17.     });  
18.       
19. });  

Java代码  

1. - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {  
2.       
3.     if (buttonIndex == 0) {  
4.           
5.         // No need to hod onto (retain)  
6.         MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self animated:YES];  
7.         hud.labelText = kDelTipsLabelForMBProgressHUD;  
8.         [NSThread detachNewThreadSelector:@selector(delTargetBook) toTarget:self withObject:nil];  
9.   
10.     }  
11. }  
12.   
13. -(void)delTargetBook  
14. {  
15.     NSAutoreleasePool *pool =[[NSAutoreleasePool alloc] init];  
16.         //代码部分  
17.   
18.         //代码部分  
19.         //回主线程执行  
20.     [self performSelectorOnMainThread:@selector(didDelTargetBook) withObject:nil waitUntilDone:NO];  
21.     [pool release];  
22. }  
23.   
24. -(void)didDelTargetBook  
25. {  
26.     [MBProgressHUD hideHUDForView:self animated:YES];  
27.       
28.     if ([delegate_ respondsToSelector:@selector(btnOfLibraryBookWasDelete:)]) {  
29.           
30.         [delegate_ btnOfLibraryBookWasDelete:self];   
31. }  
32. }