1.建一个项目WeakAndStrongDemo
在AppDelegat.m中
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
ViewController *vc = [[ViewController alloc] init];
self.window.rootViewController = vc;
[self.window makeKeyAndVisible];
return YES;
}
在ViewController.m中
用控制台打印: