ios – 如何检查应用程序何时从后台返回到前台,而不是来自推送通知？

func application(application: UIApplication,didReceiveRemoteNotification data: [NSObject : AnyObject]) {
        var dat = JSON(data)
        if application.applicationState == UIApplicationState.Active {
            // app was already in the foreground
            println("App is in foreground")
            processNotification(dat)
        }else{
            // app was just brought from background to foreground via PUSH
            println("App brought back via PUSH")
            processNotification(dat)
        }
    }

这是我检查推送通知的方式.但是,如果我发送推送通知,用户会错过它,然后通过图标打开应用程序？如何从图标中查看应用程序的打开时间？

解决方法

The UIApplicationDelegate protocol定义了几种方法,可以将代码添加到应用程序的几个生命周期事件中.

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> application(_：willFinishLaunchingWithOptions