Swift Xib，标签文本更改

如何处理挂在xib上的标签

lblName.text = "Label Text" 

我得到了一个与

在展开可选值时意外发现nil

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您应该按照以下方式更新自定义的

视图

类

首先，打开

View.xib

file set

file's Owner

custom类以查看

View

，如下图所示

class View: UIView {

    private var view: UIView!

    @IBOutlet weak var name: UILabel!

    @IBOutlet weak var firstname: UILabel!

    override init(frame: CGRect) {
        super.init(frame: frame)
        xibSetup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        xibSetup()
    }

    //FIXME:- Set up
    func xibSetup() {

        view = loadViewFromNib()
        view.frame = bounds
        view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
        addSubview(view)
    }

    func loadViewFromNib() -> UIView {

        let bundle = Bundle(for: type(of: self))
        let nib = UINib(nibName: "View", bundle: bundle)
        let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView

        return view
    }





}

设置

ui标签后

i插座，如下图所示

class View: UIView {

    private var view: UIView!

    @IBOutlet weak var name: UILabel!

    @IBOutlet weak var firstname: UILabel!

    override init(frame: CGRect) {
        super.init(frame: frame)
        xibSetup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        xibSetup()
    }

    //FIXME:- Set up
    func xibSetup() {

        view = loadViewFromNib()
        view.frame = bounds
        view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
        addSubview(view)
    }

    func loadViewFromNib() -> UIView {

        let bundle = Bundle(for: type(of: self))
        let nib = UINib(nibName: "View", bundle: bundle)
        let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView

        return view
    }





}

然后打开View.swift文件并粘贴下面给出的代码

class View: UIView {

    private var view: UIView!

    @IBOutlet weak var name: UILabel!

    @IBOutlet weak var firstname: UILabel!

    override init(frame: CGRect) {
        super.init(frame: frame)
        xibSetup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        xibSetup()
    }

    //FIXME:- Set up
    func xibSetup() {

        view = loadViewFromNib()
        view.frame = bounds
        view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
        addSubview(view)
    }

    func loadViewFromNib() -> UIView {

        let bundle = Bundle(for: type(of: self))
        let nib = UINib(nibName: "View", bundle: bundle)
        let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView

        return view
    }





}

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现在您可以在

ViewController

中查看

View

类的变量，在哪里出现错误？您需要将xib链接到swift文件，然后将每个文本框链接到相应的文本框…可以举个简单的例子吗？我的示例错误：let view=nib.instantiate（withOwner:self，options:nil）[0]as！UIVIEW在此处输入图像描述