如何以编程方式替换UITabBarController的UITabBar [英] How can I substitute the UITabBar of UITabBarController programmatically

问题描述

由于以下问题，我需要为我的项目使用UITabBar的子类

I need to use a subclass of the UITabBar for my project because of the following problem Why page Push animation Tabbar moving up in the iPhone X.

我不使用情节提要.如何以编程方式完成此操作?

I do not use storyboards. How can this be done programmatically?

-更新-

我的CustomTabBarController.swift文件现在看起来像这样:

My CustomTabBarController.swift file now looks like this:

import UIKit

@objc class customTabBarController: UITabBarController {
    override var tabBar: UITabBar {
        return customTabBar
    }
}

我的CustomTabBar.swift文件如下所示:

And my CustomTabBar.swift file looks like this:

import UIKit

class customTabBar: UITabBar {

    override var frame: CGRect {
        get {
            return super.frame
        }
        set {
            var tmp = newValue
            if let superview = superview, tmp.maxY !=
                superview.frame.height {
                tmp.origin.y = superview.frame.height - tmp.height
            }

            super.frame = tmp
        }
    }
}

但这给了我以下错误:

Cannot convert return expression of type 'customTabBar.Type' to return type 'UITabBar'

推荐答案

您应该创建自定义标签栏的实例，并用它覆盖UITabBarController子类中的tabBar属性.

You should create an instance of your custom tab bar and override the tabBar property inside your UITabBarController subclass with it.

class CustomTabBarController: UITabBarController {
    let customTabBar = CustomTabBar()

    override var tabBar: UITabBar {
        return customTabBar
    }
}    

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