Question

我对于以编程方式创建视图控制器的正确方法感到好奇。当我使用静态分析器编译此代码时，我会从alloc中获得泄漏（正如您所期望的那样）。我应该留下它，因为它需要留下直到应用程序退出，或者是否有更清洁的方式？

- (BOOL)application:(UIApplication *)application
        didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    NSLog(@"UIApplication application:");
    RectViewController *myController = [[RectViewController alloc] init];
    [window addSubview:[myController view]];
    [window makeKeyAndVisible];
    return YES;
}

欢呼加里

Answer 1

在这种情况下，将视图控制器的引用作为AppDelegate上的实例变量保留，并在AppDelegate的dealloc方法中释放它。

@interface AppDelegate : NSObject {
    // ...
    RectViewController *myController;
}

// ...
@end


@implementation AppDelegate

// ...

- (BOOL)application:(UIApplication *)application
        didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    NSLog(@"UIApplication application:");
    myController = [[RectViewController alloc] init];
    [window addSubview:[myController view]];
    [window makeKeyAndVisible];
    return YES;
}

- (void) dealloc {
    // ...
    [myController release];

    [super dealloc];
}

// ...

@end

Answer 2

在app appate中保留对视图控制器的引用（dealloc中的实例，属性，合成和释放）。

然后像这样实例化它：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

  NSLog(@"UIApplication application:");

  RectViewController *rootControllerTemp = [RectViewController new];
  self.rootController = rootControllerTemp;
  [rootControllerTemp release];

  [window addSubview:[self.rootController view]];

  [window makeKeyAndVisible];

  return YES;
}

AppDelegate viewController内存泄漏？

2 个答案: