ios 中请求主线程刷新UI

 

 1 if ([NSThread isMainThread])  
 2 {  
 3     [self.downloadMapBtn setImage:[UIImage imageNamed:@"download_map.png"] forState:UIControlStateNormal];  
 4     [self.downloadMapBtn setNeedsDisplay];  
 5 }  
 6 else  
 7 {  
 8     dispatch_sync(dispatch_get_main_queue(), ^{  
 9         //Update UI in UI thread here  
10         [self.downloadMapBtn setImage:[UIImage imageNamed:@"download_map.png"] forState:UIControlStateNormal];  
11         [self.downloadMapBtn setNeedsDisplay];  
14     });  
15 }

 

posted on 2016-04-01 11:43  codemaker313  阅读(2426)  评论(0)  编辑  收藏  举报

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