我可以在一个应用程序中混合使用 UIKit 和 TVMLKit 吗? [英] Can I mix UIKit and TVMLKit within one app?

问题描述

我正在探索 tvOS，发现 Apple 提供了一套不错的 模板 使用 TVML 编写.我想知道使用 TVML 模板的 tvOS 应用程序是否也可以使用 UIKit.

I'm exploring tvOS and I found that Apple offers nice set of templates written using TVML. I'd like to know if a tvOS app that utilises TVML templates can also use UIKit.

我可以在一个应用中混合使用 UIKit 和 TVMLKit 吗?

我在 Apple 开发者论坛 上找到了一个帖子，但它并没有完全回答这个问题，我正在处理文档以找到答案.

I found a thread on Apple Developer Forum but it does not fully answer this question and I am going through documentation to find an answer.

推荐答案

是的，你可以.显示 TVML 模板需要您使用控制 JavaScript 上下文的对象:TVApplicationController.

Yes, you can. Displaying TVML templates requires you to use an object that controls the JavaScript Context: TVApplicationController.

var appController: TVApplicationController?

这个对象有一个与之关联的 UINavigationController 属性.因此，只要您认为合适，您就可以致电:

This object has a UINavigationController property associated with it. So whenever you see fit, you can call:

let myViewController = UIViewController()
self.appController?.navigationController.pushViewController(myViewController, animated: true)

这允许您将自定义 UIKit 视图控制器推送到导航堆栈上.如果您想返回 TVML 模板，只需将 viewController 从导航堆栈中弹出即可.

This allows you to push a Custom UIKit viewcontroller onto the navigation stack. If you want to go back to TVML Templates, just pop the viewController off of the navigation stack.

如果你想知道如何在 JavaScript 和 Swift 之间进行通信，这里有一个方法可以创建一个名为 pushMyView()

If what you would like to know is how to communicate between JavaScript and Swift, here is a method that creates a javascript function called pushMyView()

func createPushMyView(){

    //allows us to access the javascript context
    appController?.evaluateInJavaScriptContext({(evaluation: JSContext) -> Void in

        //this is the block that will be called when javascript calls pushMyView()
        let pushMyViewBlock : @convention(block) () -> Void = {
            () -> Void in

            //pushes a UIKit view controller onto the navigation stack
            let myViewController = UIViewController()
            self.appController?.navigationController.pushViewController(myViewController, animated: true)
        }

        //this creates a function in the javascript context called "pushMyView". 
        //calling pushMyView() in javascript will call the block we created above.
        evaluation.setObject(unsafeBitCast(pushMyViewBlock, AnyObject.self), forKeyedSubscript: "pushMyView")
        }, completion: {(Bool) -> Void in
        //done running the script
    })
}

在 Swift 中调用 createPushMyView() 后，您可以在 javascript 代码中自由调用 pushMyView()，它会将视图控制器推送到堆栈中.

Once you call createPushMyView() in Swift, you are free to call pushMyView() in your javascript code and it will push a view controller onto the stack.

SWIFT 4.1 更新

只需对方法名称和转换进行一些简单的更改:

Just a few simple changes to method names and casting:

appController?.evaluate(inJavaScriptContext: {(evaluation: JSContext) -> Void in

和

evaluation.setObject(unsafeBitCast(pushMyViewBlock, to: AnyObject.self), forKeyedSubscript: "pushMyView" as NSString)

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