Question

我使用单例作为整个应用程序中使用的本地化字符串，字典键和通知名称的容器。它初始化如下：

class ConstantsManager {

     private init() {}

     class var sharedInstance: ConstantsManager {
        struct Static {
            static let instance: ConstantsManager! = ConstantsManager()
        }
        return Static.instance
    }

     let localization = "NSLocalizedString(etc.)"
     let dictKey = "aKey"
     let notificationName = Notification.Name("name")
}

首次使用单例出现在AppDelegate的应用程序中（_ application：didFinishLaunchingWithOptions :)。当仪器/泄漏达到

时

让manager = ConstantsManager.sharedInstance

指示泄漏。下面的调用树是否表明初始化发生了两次？我想知道与第二次初始化相关的属性是否代表泄漏。奇怪的是，模拟器上不会发生泄漏。（我正在使用Xcode 8.2.1和OS X 10.12.3进行iOS 10.2部署。）

 Bytes Used           # Leaks     Symbol Name
448 Bytes  100.0%     14          ConstantsManager.init() -> ConstantsManager
448 Bytes  100.0%     14          ConstantsManager.__allocating_init() -> ConstantsManager
448 Bytes  100.0%     14          globalinit_33_8D935C4E2193156DAA2AB3DF99F55E80_func0
448 Bytes  100.0%     14          static ConstantsManager.(sharedInstance.getter).(Static #1).instance.unsafeMutableAddressor
448 Bytes  100.0%     14          static ConstantsManager.sharedInstance.getter
448 Bytes  100.0%     14          AppDelegate.registerUserDefaults() -> ()
448 Bytes  100.0%     14          AppDelegate.application(UIApplication, didFinishLaunchingWithOptions : [UIApplicationLaunchOptionsKey : Any]?) -> Bool
448 Bytes  100.0%     14          @objc AppDelegate.application(UIApplication, didFinishLaunchingWithOptions : [UIApplicationLaunchOptionsKey : Any]?) -> Bool
448 Bytes  100.0%     14          main

Swift Singleton内存泄漏

0 个答案: