1、project -> Build settings -> Apple LLVM complier 3.0 - Language -> objective-C Automatic Reference Counting设置为NO;

 

2、修改main.m

@autoreleasepool {          return UIApplicationMain(argc, argv, nil,    NSStringFromClass([LTAppDelegate class]));   }

　　

 

修改为：

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];      int retVal = UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));      [pool release];      return retVal;

　　

 

3、修改AppDelegate

 

@property (retain, nonatomic) UIWindow *window;

　　

 将strong修改为retain。

-(void)dealloc  {      [_window release];      [super dealloc];  }