Question

在“ contentLabel.text = content”行找不到零错误

打开/关闭commonInit

class SuccessfulView: UIView{

  @IBOutlet weak var contentLabel: UILabel!

  convenience init(content:String ,frame: CGRect){
    self.init(frame:frame)
    contentLabel.text = content

  }

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



  }
  override init(frame: CGRect) {
    super.init(frame: frame) // calls designated initializer

  }



  func commonInit(){
    Bundle.main.loadNibNamed("SuccessfulFooterContentView", owner: self, options: nil)
    addSubview(contentLabel)
  }

}

创建具有xib的UIView的子类

Answer 1

问题是，如果您调用init(frame:)中的UIView，则不会由界面构建器（storyboard / Xib）初始化。

因此，您应该通过Xib初始化视图。就像-

var content: String = ""

static public func instance(content: String, frame: CGRect) -> SuccessfulView? {
    let view = Bundle.main.loadNibNamed("SuccessfulFooterContentView", owner: self, options: nil) as? SuccessfulView
    view?.frame = frame
    // and save your content
    view?.content = content
    return view
}

然后在awakeFromNib函数中设置您的内容

override func awakeFromNib() {
   super.awakeFromNib()
   contentLabel.text = content
}

Answer 2

您在说

Bundle.main.loadNibNamed("SuccessfulFooterContentView", owner: self, options: nil)

相信这会导致此变量

@IBOutlet weak var contentLabel: UILabel!

要设置。但是，除非将笔尖中的文件所有者设置为SuccessView类并且连接了contentLabel出口，否则不会如此。

使用创建自定义UIView时出现问题，使用@IBOutlet找不到Xib错误

2 个答案: