Custom UIView Implemenation

Question

我有一个称为BaseView的customView，它具有一个contentView，在contentView中，我要在覆盖init（frame：CGRect）方法中添加所有其他子视图（UILabel，UIButton等）。

现在我的BaseView有10个子类，它们也重写init（frame：CGRect）并调用基类init（frame：CGRect）方法。

这里所有子类的UI都与其BaseView相似，现在BaseView的一个子类不希望该基类中包含某些UI元素，但是我仍然需要调用superview init（frame：CGRect）。如何在不影响其他类的情况下更改代码？

Class BaseView: UIView {

let contentView = UIView()

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

       let lbl1 = UILabel()
       contentView.addSubView(lbl1)

       let lbl2 = UILabel()
       contentView.addSubView(lbl2)

       self.addSubView(contentView)

     }

  Class subView1: BaseView {

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

      // This class will show lbl1, lbl2 and lbl3 in the contentview

       let lbl3 = UILabel()
       contentView.addSubView(lbl3) // this contentview is BaseView's ContentView


     }

   // Similarly I have around 10 Subclasses of BaseView which is adding some UI Element to 
    baseview's contentView

   // Question here is, below I am going to create another subclass of BaseView, But I don't 
    want to show lbl1 and lbl2 which is created in my BaseView's contentview

   Class myView: BaseView {

   // this class should not show the base class uilement lbl1 and lbl2, It should show only 
    lbl4 which is created by this class only

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

       let lbl4 = UILabel()
       contentView.addSubView(lbl4) // this contentview is BaseView's ContentView


     }

Answer 1

代替调用super.init，您只需在子类中添加所需的代码，如下所示：

class myView: BaseView {

 override init(frame: CGRect) {
    addSubview(contentView)

    let lbl4 = UILabel()
    contentView.addSubView(lbl4)
  }
}