使用调试器在真实手表上启动watchOS应用程序初始化两次

Question

我在真正的Apple Watch（watchOS 2.0.1）

上启动了XCode 7.1.1的应用程序

我的ExtensionDelegate中的一些代码：

var applicationDidFinishLaunchingCalled = 0
func applicationDidFinishLaunching() {
    applicationDidFinishLaunchingCalled++
    print("applicationDidFinishLaunching() round \(applicationDidFinishLaunchingCalled)")

}

var applicationDidBecomeActiveCalled = 0
func applicationDidBecomeActive() {
    applicationDidBecomeActiveCalled++
     print("applicationDidBecomeActive() round \(applicationDidBecomeActiveCalled)")

}

var applicationWillResignActiveCalled = 0
func applicationWillResignActive() {
    applicationWillResignActiveCalled++
    print("applicationWillResignActive() round \(applicationWillResignActiveCalled)")

}

将以下内容输出到控制台：

applicationDidFinishLaunching() round 1
applicationDidBecomeActive() round 1
applicationDidFinishLaunching() round 2
applicationDidBecomeActive() round 2

（没有调用applicationWillResignActive（））

这里发生了什么？ 如何防止应用程序初始化两次？ 当我没有调试时，我如何知道这不会发生？

我在一次调用所有内容的模拟器中没有这种效果。