如何强制焦点更改为 tvOS 中的特定视图? [英] How can I force focus to change to a specific view in tvOS?

问题描述

我正在实施自定义代码来处理对 Siri Remote 上的菜单按钮的点击.按下菜单按钮时，如何强制焦点切换到我的自定义菜单?

I am implementing custom code to handle a click on the Menu button on the Siri Remote. How can I force focus to change to my custom menu when pressing the menu button?

推荐答案

我自己终于想通了.您必须覆盖 UIView 或 UIViewController 的 preferredFocusedView 属性.

Finally figured it out myself. You have to override the preferredFocusedView property of your UIView or UIViewController.

在 Swift 中它是这样工作的:

In Swift it works like this:

func myClickHandler() {
    someCondition = true
    self.setNeedsFocusUpdate()
    self.updateFocusIfNeeded()
    someCondition = false
}

override weak var preferredFocusedView: UIView? {
    if someCondition {
        return theViewYouWant
    } else {
        return defaultView
    }
}

我不太记得如何在 Objective-C 中覆盖 getter，所以如果有人想发帖，我会编辑答案.

I can't quite remember how to override getters in Objective-C so if someone want to post that I'll edit the answer.

这篇关于如何强制焦点更改为 tvOS 中的特定视图?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！