swift - "UIApplication.sharedApplication().delegate"swift_dynamicCastClassUnconditional

Question

尝试访问我的 AppDelegate 实例但因 swift_dynamicCastClassUnconditional 而失败。

class AppDelegate: UIResponder, UIApplicationDelegate {
    class func getInstance() -> AppDelegate {
        let delegate = UIApplication.sharedApplication().delegate;
        return delegate as AppDelegate;
    }
    ........
}

有什么想法吗？谢谢。

Answer 1

原来是Urbanairship库引起的。当应用程序初始化时，我调用了 api

    var uaconfig = UAConfig.defaultConfig() as UAConfig
    UAirship.setLogLevel(UALogLevel.Debug)
    UAirship.takeOff(uaconfig)
    UAPush.shared().userNotificationTypes = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound
    UAPush.shared().userPushNotificationsEnabled = true

我删除上面的代码后，现在一切都很好。