NSTimer NSThread

  

   

    

     

    
    

     

       NSTimer    *timer = [NSTimer scheduledTimerWithTimeInterval:10.0 target:self selector:@selector(UpdateTimerFunc:) userInfo:nil repeats:YES];
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      -(void)UpdateTimerFunc:(NSTimer *)theTimer
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

      [updateGpsTimer invalidate];//stop timer
     
    
   

    

     

    
    

     
        return;
     
    
   

    

     

    
    

     

      }
     
    
  
 

  

   

    

     

    
    

     

      NSThread *InitThread = [[NSThread alloc]initWithTarget:self selector:@selector(InitThreadFunc:) object:self];
     
    
   

    

     

    
    

     

       [InitThread start];
     
    
   

    

     

    
    

     

      -(void)InitThreadFunc:(id)sender
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          ViewController *fSelf = (ViewController*)sender;
     
    
   

    

     

    
    

     

          [g_soapReadUserMsgFromSql];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

          [selfloadWeather];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

      }
     
    
  
 

[self performSelectorOnMainThread:@selector(DuquDBQiye:) withObject:nil waitUntilDone:NO];
 

GCD实现异步

  

   

    

     

    
    

     

      dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
     
    
   

    

     

    
    

     
    // 耗时的操作
     
    
   

    

     

    
    

     
    dispatch_async(dispatch_get_main_queue(), ^{
     
    
   

    

     

    
    

     
        // 更新界面
     
    
   

    

     

    
    

     

          });
     
    
   

    

     

    
    

     

      });
     
    
  
 

  

   

    

     

    
    

     
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
     
    
   

    

     

    
    

     
    dispatch_group_t group = dispatch_group_create();
     
    
   

    

     

    
    

     
    dispatch_group_async(group, queue, ^{
     
    
   

    

     

    
    

     

              [NSThread sleepForTimeInterval:1];
     
    
   

    

     

    
    

     
        NSLog(@"group1");
     
    
   

    

     

    
    

     

          });
     
    
   

    

     

    
    

     
    dispatch_group_async(group, queue, ^{
     
    
   

    

     

    
    

     

              [NSThread sleepForTimeInterval:2];
     
    
   

    

     

    
    

     
        NSLog(@"group2");
     
    
   

    

     

    
    

     

          });
     
    
   

    

     

    
    

     
    dispatch_group_async(group, queue, ^{
     
    
   

    

     

    
    

     

              [NSThread sleepForTimeInterval:3];
     
    
   

    

     

    
    

     
        NSLog(@"group3");
     
    
   

    

     

    
    

     

          });
     
    
   

    

     

    
    

     
    dispatch_group_notify(group, dispatch_get_main_queue(), ^{
     
    
   

    

     

    
    

     
        NSLog(@"updateUi");
     
    
   

    

     

    
    

     

          });
     
    
   

    

     

    
    

     
    dispatch_release(group);
     
    
  
 

  
 
 

文章来源: zzzili.blog.csdn.net，作者：清雨小竹，版权归原作者所有，如需转载，请联系作者。

原文链接：zzzili.blog.csdn.net/article/details/8278290