ios - AppDelegate中发生奇怪的泄漏

Question

为什么仪器在AppDelegate类的以下代码行中检测到泄漏？这是“泄漏”工具的屏幕截图，下面是源代码。
AppDelegate实现文件:

#import "AppDelegate.h"
#import "Strings.h"

@implementation AppDelegate
@synthesize window = hWindow;
- (void)dealloc
{
    [hWindow release];
    [super dealloc];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
   // [[UIApplication sharedApplication] setStatusBarHidden:YES];
    [[UIApplication sharedApplication] setIdleTimerDisabled:YES];
    if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone)
    {    // The iOS device = iPhone or iPod Touch

        CGSize iOSDeviceScreenSize = [[UIScreen mainScreen] bounds].size;
        UIViewController *initialViewController = nil;
        if (iOSDeviceScreenSize.height == 480)
        {   // iPhone 3GS, 4, and 4S and iPod Touch 3rd and 4th generation: 3.5 inch screen (diagonally measured)

            // Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone35
            UIStoryboard *iPhone35Storyboard = [UIStoryboard storyboardWithName:@"Storyboard_Retina3.5" bundle:nil];

            // Instantiate the initial view controller object from the storyboard
            initialViewController = [iPhone35Storyboard instantiateInitialViewController];
        }

        if (iOSDeviceScreenSize.height == 568)
        {   // iPhone 5 and iPod Touch 5th generation: 4 inch screen (diagonally measured)

            // Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone4
            UIStoryboard *iPhone4Storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:nil];

            // Instantiate the initial view controller object from the storyboard
            initialViewController = [iPhone4Storyboard instantiateInitialViewController];
        }
        // Instantiate a UIWindow object and initialize it with the screen size of the iOS device
        [self setWindow:[[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]];

        // Set the initial view controller to be the root view controller of the window object
        self.window.rootViewController  = initialViewController;

        // Set the window object to be the key window and show it

    } else if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)
    {   // The iOS device = iPad
        UIViewController *initialViewController = nil;
        UIStoryboard *iPhone4Storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPad" bundle:nil];

        // Instantiate the initial view controller object from the storyboard
        initialViewController = [iPhone4Storyboard instantiateInitialViewController];
        [self setWindow:[[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]];

        // Set the initial view controller to be the root view controller of the window object
        self.window.rootViewController  = initialViewController;
        // Set the window object to be the key window and show it

        [[UIApplication sharedApplication] setStatusBarHidden:NO];
    }
    [[self window] makeKeyAndVisible];
    NSLog(@"%d",[[self window] retainCount]);
    [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationNone];
#if __IPHONE_OS_VERSION_MAX_ALLOWED < 70000
    //iOS 7 only stuff here
#endif
    return YES;
}
.....
@end

AppDelegate头文件:

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>
{
    UIWindow *hWindow;
}
@property (strong, nonatomic) UIWindow *window;

@end

可能的原因是该应用程序仍在运行并且没有为了取消分配而终止吗？我想提到的是，在Xcode 4中，我并没有遇到这种泄漏，它开始出现在Xcode 5中。

Answer 1

泄漏工具仅告诉您导致分配泄漏的代码行，而不是泄漏原因。在这种情况下，由于它是一次运行的方法，并且假定是在应用程序的整个生命周期内始终存在的单个对象，所以这不是问题。

但是，它应该修复，但是这里没有足够的信息来建议修复。

声称泄漏了哪些物体？

同样，它是非典型的事情，比如@synthesize window = hWindow。不要声明ivar，而只是让编译器自动合成_window。这将导致代码更接近标准模式。