Question

我的项目中有一个CustomView.swift（UIView的子类）连接到CustomView.xib。

（注意：将xib类设置为CustomView但未设置所有者）

将xib文件加载到 CustomView.swift ：

中

class CustomView: UIView {

    @IBOutlet weak var label1: UILabel!
    @IBOutlet weak var label2: UILabel!

    /*
    // Only override drawRect: if you perform custom drawing.
    // An empty implementation adversely affects performance during animation.
    override func drawRect(rect: CGRect) {
        // Drawing code
    }*/

    override init(frame: CGRect) {
        super.init(frame: frame)
        let subView: UIView = loadViewFromNib()
        subView.frame = self.bounds
        //label1.text = "123" //would cause error
        addSubview(subView)
    }

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

    func loadViewFromNib() -> UIView {
        let view: UIView = UINib(nibName: "CustomView", bundle: nil).instantiateWithOwner(nil, options: nil)[0] as! UIView
        return view
    }
}

我在某处制作自定义视图：

let myCustomView:CustomView = CustomView.init(frame: CGRectMake(0, 0, 100, 100))
myCustomView.label1?.text = "123"
myCustomView.label2?.text = "abc"
print(myCustomView.label1.text)// returned nil

在xib标签上没有显示任何内容。

我应该为CustomView.swift编写扩展并添加一个分配文本的函数吗？

Answer 1

你必须从Nib加载

//let myCustomView:CustomView = CustomView.init(frame: CGRectMake(0, 0, 100, 100))
let myCustomView:CustomView = UINib(nibName: "CustomView", bundle: nil).instantiateWithOwner(nil, options: nil)[0] as! CustomView

myCustomView.label1?.text = "123"
myCustomView.label2?.text = "abc"
print(myCustomView.label1.text)

Swift将文本分配给xib文件中的标签

1 个答案: