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标题: ios - 我如何在标签栏项目上添加自定义 View [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-13 04:01
标题: ios - 我如何在标签栏项目上添加自定义 View

我需要在标签栏项目上添加两条垂直线。我怎么能做到这一点？谢谢。

添加下一个代码:

var imageLeft: UIImageView?
var imageRight: UIImageView?

override func viewDidLoad() {
    super.viewDidLoad()

    let grayColor = UIColor(red: 170/255, green: 170/255, blue: 170/255, alpha: 1.0)
    let leftLine = (tabBar.frame.width/2) - ((tabBar.frame.width/5)/2)
    let rightLine = (tabBar.frame.width/2) + ((tabBar.frame.width/5)/2)
    imageLeft = UIImageView(image: createImage(color: grayColor, size: tabBar.frame.size, x: leftLine))
    imageRight = UIImageView(image: createImage(color: grayColor, size: tabBar.frame.size, x: rightLine))
    tabBar.addSubview(imageLeft!)
    tabBar.addSubview(imageRight!)
}

func createImage(color: UIColor, size: CGSize, x: CGFloat) -> UIImage {
    let rect: CGRect = CGRect(x: x, y: 5, width: 1, height: tabBar.frame.height - 11)
    UIGraphicsBeginImageContextWithOptions(size, false, 0)
    color.setFill()
    UIRectFill(rect)
    let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
    UIGraphicsEndImageContext()
    return image
}

我的结果:

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Best Answer-推荐答案

为此，您可以继承 UITabBarController 并在您想要的位置添加 UIImageView:

class TabBarController: UITabBarController {

    var image: UIImageView?

    override func viewDidLoad() {
        super.viewDidLoad()
        image = UIImageView(image: createImage(color: UIColor(red:0.18, green:0.66, blue:0.24, alpha:1.0), size: tabBarItemSize, lineHeight: 4))
        tabBar.addSubview(image!)
    }

    func createImage(color: UIColor, size: CGSize, lineHeight: CGFloat) -> UIImage {
        let rect: CGRect = CGRect(x: 0, y: size.height - lineHeight, width: size.width, height: lineHeight )
        UIGraphicsBeginImageContextWithOptions(size, false, 0)
        color.setFill()
        UIRectFill(rect)
        let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()
        return image
    }
}

您需要根据需要对其进行修改并计算您希望它所在的位置，但这应该会有所帮助。我在 an article I wrote 中对此有所了解.

关于ios - 我如何在标签栏项目上添加自定义 View ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49050842/

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