决绝Capturing 'demo' strongly in this block is likely to lead to a retain cycle

1. - (IBAction)onTest:(id)sender  
2. {  
3.     BlockDemo *demo = [[BlockDemo alloc]init];  
4.       
5.     __weak typeof(BlockDemo) *weakDemo = demo;  
6.       
7.     [demo setExecuteFinished:^{  
8.         if (weakDemo.resultCode == 200) {  
9.             NSLog(@"call back ok.");  
10.         }  
11.     }];  
12.     [demo executeTest];  
13. }

决绝Capturing 'demo' strongly in this block is likely to lead to a retain cycle

原文：http://www.cnblogs.com/piaojin/p/5028557.html