Objective-c 发布被调用了这么多次

Posted 2023-03-06

【中文标题】Objective-c 发布被调用了这么多次

【英文标题】：Objective-c release called so many times

【发布时间】：2013-04-09 22:56:00

【问题描述】：

我的根视图控制器的release方法被调用了38次，但我没有调用release，为什么会出现？

@implementation AppDelegate

- (void)dealloc

    [_window release];
    [_viewController release];
    [super dealloc];


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

    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) 
        self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController_iPhone" bundle:nil] autorelease];
     else 
        self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController_iPad" bundle:nil] autorelease];
    
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;

---

@interface ViewController ()

@end

@implementation ViewController

-(oneway void)release

    NSLog(@"release called");
    [super release];


@end

---

输出

2013-04-09 19:47:36.060 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.063 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.064 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.065 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.065 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.066 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.067 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.068 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.072 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.073 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.074 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.075 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.077 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.080 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.081 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.081 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.082 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.108 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.110 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.111 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.112 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.134 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.144 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.158 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.161 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.170 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.180 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.182 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.193 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.197 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.198 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.199 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.202 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.208 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.208 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.218 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.220 TesteRelease[44985:c07] release called
2013-04-09 19:47:36.220 TesteRelease[44985:c07] release called

---

我没有使用 ARC。

【问题讨论】：

您的视图控制器对象可以被多个框架对象传递。此外，即使你不使用 ARC，Apple 也可能使用；并且 ARC 在调用保留/释放方面并不轻松。无论如何，我认为这与记录发布调用无关。仅当调用 dealloc 时才有意义。

【参考方案1】：

框架的一部分在他们认为合适的时候保留和释放（或自动释放）对象。这是鼓励您不要尝试精确跟踪保留计数的众多原因之一——您不需要知道所有这些保留和释放正在发生，因为它们与您无关。

【参考方案2】：

您的视图控制器很可能会被添加到自动释放池中，因为它是通过系统库传递的。但只要您确信您的代码正确地管理视图控制器，您就应该将其视为背景噪音而忽略。