About the callback of SKStoreReviewController.requestReview()

Question

If the review popup initiated from a view controller shows up, there isn't a way to switch the window focus back to the view controller when the popup is dismissed due to lack of callback function of SKStoreReviewController.requestReview().

I would like to make a call to becomeFirstResponder() when the review popup is dismissed. Any idea?

Is there a way to extend the SKStoreReviewController and add a callback somehow?

Answer 1

Warning this will probably break at some point.

Step 1: add this code to your didFinishLaunchingWithOptions

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    let windowClass: AnyClass = UIWindow.self

    let originalSelector: Selector = #selector(setter: UIWindow.windowLevel)
    let swizzledSelector: Selector = #selector(UIWindow.setWindowLevel_startMonitor(_:))

    let originalMethod = class_getInstanceMethod(windowClass, originalSelector)
    let swizzledMethod = class_getInstanceMethod(windowClass, swizzledSelector)

    let didAddMethod = class_addMethod(windowClass, originalSelector, method_getImplementation(swizzledMethod!), method_getTypeEncoding(swizzledMethod!))

    if didAddMethod {
        class_replaceMethod(windowClass, swizzledSelector, method_getImplementation(originalMethod!), method_getTypeEncoding(originalMethod!))
    } else {
        method_exchangeImplementations(originalMethod!, swizzledMethod!)
    }

    return true
}

Step 2: add this class

class MonitorObject: NSObject {
    weak var owner: UIWindow?

    init(_ owner: UIWindow?) {
        super.init()
        self.owner = owner
        NotificationCenter.default.post(name: UIWindow.didBecomeVisibleNotification, object: self)
    }

    deinit {
         NotificationCenter.default.post(name: UIWindow.didBecomeHiddenNotification, object: self)
    }
}

Step 3: Add this UIWindow extension

private var monitorObjectKey = "monitorKey"
private var partialDescForStoreReviewWindow = "SKStore"

extension UIWindow {
    // MARK: - Method Swizzling
    @objc func setWindowLevel_startMonitor(_ level: Int) {
        setWindowLevel_startMonitor(level)

        if description.contains(partialDescForStoreReviewWindow) {
             let monObj = MonitorObject(self)
             objc_setAssociatedObject(self, &monitorObjectKey, monObj, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
    }
}

Step 4: add this to ViewDidLoad of your controller where you want this

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    NotificationCenter.default.addObserver(self, selector: #selector(windowDidBecomeHiddenNotification(_:)), name: UIWindow.didBecomeHiddenNotification, object: nil)
}

Step 5: add the callback for the notification and check that the associated object is a match

@objc func windowDidBecomeHiddenNotification(_ notification: Notification?) {
    if notification?.object is MonitorObject {
        print("hello")
    }
}

Now when a review dialog is closed the notification is triggered and 'print("hello") will be called.