1.TARGETS --->build settings       搜索    compiler  

 

　　　　找到  compiler for c/c++/objective-c    改成   APPLE LLVM compiler 3.0

 

2.TARGETS --->build settings       搜索     analyzer

 

　　　　Run Static Analyzer   改成  YES

 

3.TARGETS --->build settings       搜索     automatic

 

　　　　objective-c Automatic Reference Counting    改成YES

 

4.From Xcode's menu        

　　　　

　　　　Edit\Refactor\Convert to Objective-C ARC.    

 

5.Open the Xcode Preferences window (from the menubar, under Xcode) and go to the General tab.

　　　　

　　　　Enable the option Continue building after errors: 

 

6.修改代码

 

　　　　eg.

- (void)onHelpViewAnimationComplete:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {    UIImageView *imageView = (__bridge UIImageView *)context;    [imageView removeFromSuperview];    helpView = nil;}

 

　　　　eg.

[UIView beginAnimations:nil context:(__bridge void *)helpView];