iOS 文字提示框封裝

Github完整版Demo 包括點選任意地方立即移除等

效果

簡單幾行程式碼大家自己看吧。

程式碼

class JSAlertLabel: UILabel {

  let screenWidth = UIScreen.main.bounds.width
  let screenHeight = UIScreen.main.bounds.height

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

  required init?(coder aDecoder: NSCoder) {
      fatalError("init(coder:) has not been implemented")
  }
  private func setup() {
      backgroundColor = UIColor.black
      alpha = 0
      layer.cornerRadius = 2.5
      numberOfLines = 1
      textAlignment = .center
  }
  
  /** 出現動畫0.2秒 消失動畫0.3秒 呈現在螢幕上的時間=delay。最大長度螢幕寬度/2 高度20
 */
  public func show(text: String, onView view: UIView, removeAfter delay: Double) {
      attributedText = NSAttributedString(string: text, attributes: [NSAttributedStringKey.foregroundColor : UIColor.white, NSAttributedStringKey.font: UIFont.systemFont(ofSize: 15)])
    
      view.addSubview(self)
      UIView.animate(withDuration: 0.2, delay: 0, options: [], animations: {
          self.alpha = 0.6
      }) { (_) in
          UIView.animate(withDuration: 0.3, delay: delay, options: [], animations: {
              self.alpha = 0
          }) { (_) in
              self.removeFromSuperview()
          }
      }
    
    
    }
}
複製程式碼