在 Swift 3 中检查 launchOptions [英] Checking launchOptions in Swift 3

问题描述

我已将代码转换为 swift 3，并已提交至应用商店.当他们打开应用程序时，它第一次崩溃.结果，我检查了我的崩溃日志，它在这一行崩溃了.

I have converted my codes to swift 3 and I have submitted to app store. When they open app, it crash at first time. As a result, I check my crashlog and it crash at this line.

    if let myLaunchOptions: NSDictionary = launchOptions as NSDictionary? {

我的整体代码是这样的.我知道 launchOptions 可以为零，甚至可能不是 NSDictionary.这就是为什么我像这样检查并且在那条线上失败了.我可以知道如何使用 swift 3 检查/预防吗?

My overall code is like this. I know that launchOptions can be nil and it might not even be NSDictionary. That's why I have checked like that and it fail at that line. May I know how else to check/prevent with swift 3?

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    if let myLaunchOptions: NSDictionary = launchOptions as NSDictionary? {
        let test = myLaunchOptions[UIApplicationLaunchOptionsKey.userActivityDictionary] as! NSDictionary
        let userActivity = test["UIApplicationLaunchOptionsUserActivityKey"] as! NSUserActivity
        NSLog("test1:" + String(describing: userActivity))
        continueUserActivity(userActivity)
        }

我的崩溃日志在这里.

推荐答案

您应该像这样检查和获取用户活动:

You should be checking and obtaining user activity like this:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    if let userActivityDictionary = launchOptions?[.userActivityDictionary] as? [UIApplicationLaunchOptionsKey : Any],
        let userActivity = userActivityDictionary[.userActivityType] as? NSUserActivity {
        continueUserActivity(userActivity)
    }

    return true
}

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