ios - 在 IBDesignableTextField 上的何处设置颜色

Question

我有一个问题，建议在哪里设置我已子类化的 UITextField 的颜色。这是一些代码。

@IBDesignable
class TextField: UITextField {

     //var inset is not important for this question. 
     @IBInspectable var inset: CGFloat = 10

     override init(frame: CGRect) {
           super.init(frame: frame)
           //tried setting color here, didn't show up in storyboard
      } 

     required init?(coder aDecoder: NSCoder) {
          super.init(coder: aDecoder)
          //tried setting color here, didn't show up in storyboard
     }

     override func drawRect(rect: CGRect) {
          super.drawRect(rect)
          //tried setting color here, didn't show up in storyboard
     }

    override func textRectForBounds(bounds: CGRect) -> CGRect {
         self.backgroundColor = UIColor.redColor()
         //HERE IT WORKS!!!
         return CGRectInset(bounds, inset, inset)
    }

    override func editingRectForBounds(bounds: CGRect) -> CGRect {
         return textRectForBounds(bounds)
    }
}

所以，我基本上想做的是编写 UITextField 的子类，它设置 Storyboard中显示的文本字段(以及将来的其他内容)的背景颜色。我唯一可以让它工作的地方是在 textRectForBounds: 函数上，我必须为文本设置填充。我的问题是，建议在哪里设置 UITextField 的背景颜色并使该更改显示在 Storyboard 中？谢谢。

Answer 1

我让它工作的方法是添加这些方法......

#if !TARGET_INTERFACE_BUILDER
required init(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)!
    self._setup()
}
#endif

override func prepareForInterfaceBuilder() {
    self._setup()
}

func _setup() {
    //do all the setup here to make the appearance show up in Interface builder and app.
}