ios - 如何禁用 uitextField.rightView 的编辑功能。

Question

所以我在我的应用程序中实现了一个 uitextfield 并将其右 View 设置为一个按钮来触发某些东西。

但是，每当我按下 uitextfield 的 rightView 时，它也会触发应用程序开始编辑(显示键盘)。

如何在按下 uitextField 的 rightView 时禁用编辑？

谢谢。

Answer 1

使用这个自定义子类:

@IBDesignable class TJTextField: UITextField {

    fileprivate var ImgIcon: UIImageView?

    @IBInspectable var errorEntry: Bool = false {
        didSet {
            self.setNeedsDisplay()
        }
    }
    @IBInspectable var leftTextPedding: Int = 0 {
        didSet {
            self.setNeedsDisplay()
        }
    }
    @IBInspectable var lineColor: UIColor = UIColor.black {
        didSet {
            self.setNeedsDisplay()
        }
    }
    @IBInspectable var placeHolerColor: UIColor = UIColor(red: 199.0/255.0, green: 199.0/255.0, blue: 205.0/255.0, alpha: 1.0) {
        didSet {
            self.setNeedsDisplay()
        }
    }
    @IBInspectable var errorColor: UIColor = UIColor.red {
        didSet {
            self.setNeedsDisplay()
        }
    }

    @IBInspectable var imageWidth: Int = 0 {
        didSet {
            self.setNeedsDisplay()
        }
    }
    @IBInspectable var txtImage : UIImage? {
        didSet {
            self.setNeedsDisplay()
        }
    }
    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return self.newBounds(bounds)
    }
    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        return self.newBounds(bounds)
    }

    fileprivate func newBounds(_ bounds: CGRect) -> CGRect {

        var newBounds = bounds
        newBounds.origin.x += CGFloat(leftTextPedding) + CGFloat(imageWidth)
        return newBounds
    }

    var errorMessage: String?

    override func awakeFromNib() {
        super.awakeFromNib()
        //setting left image
        if (txtImage != nil)
        {
            let btnLeft = UIButton()

            btnLeft.frame = CGRect(x: 0, y: 0, width: CGFloat(imageWidth), height: self.frame.height)
            btnLeft.setImage(txtImage, for: .normal)
            self.leftViewMode = UITextFieldViewMode.always
            self.leftView = btnLeft
            btnLeft.addTarget(self, action: #selector(TJTextField.btnClicked), for: .touchUpInside)
        }
    }
    func btnClicked()
    {
        if !self.isEditing
        {
            self.resignFirstResponder()
        }

    }
    override func draw(_ rect: CGRect)
    {
        let height = self.bounds.height

        // get the current drawing context
        let context = UIGraphicsGetCurrentContext()

        // set the line color and width
        if errorEntry {
            context?.setStrokeColor(errorColor.cgColor)
            context?.setLineWidth(1.5)
        } else {
            context?.setStrokeColor(lineColor.cgColor)
            context?.setLineWidth(0.5)
        }

        // start a new Path
        context?.beginPath()

        context!.move(to: CGPoint(x: self.bounds.origin.x, y: height - 0.5))
        context!.addLine(to: CGPoint(x: self.bounds.size.width, y: height - 0.5))
        // close and stroke (draw) it
        context?.closePath()
        context?.strokePath()

        //Setting custom placeholder color
        if let strPlaceHolder: String = self.placeholder
        {
            self.attributedPlaceholder = NSAttributedString(string:strPlaceHolder,
                attributes:[NSForegroundColorAttributeName:placeHolerColor])
        }
    }
    override func leftViewRect(forBounds bounds: CGRect) -> CGRect
    {
        return CGRect(x: 0, y: 0, width: CGFloat(imageWidth), height: self.frame.height)
    }
}