图像不会加载按钮。迅速

Question

我用类WWZButton创建了一个按钮，但是这个类显然不起作用。我想添加一个' arrow_btn '

的图像

这就是它现在的样子。但是需要在右侧成为arrow_btn。 Login button

这是类代码：`import UIKit

类WWZButton：UIButton {

@IBInspectable var isOrange: Bool = true

private var rightImageView: UIImageView?

func setupView() {

    rightImageView?.removeFromSuperview()
    rightImageView = UIImageView(frame: CGRect(x: frame.width - 35, y: 7.5, width: 25, height: 15), image: UIImage(named: "arrow_btn")!)
    rightImageView?.contentMode = .ScaleAspectFit
    addSubview(rightImageView!)
    contentHorizontalAlignment = .Left
    contentEdgeInsets = UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 0)
    setTitleColor(UIColor.whiteColor(), forState: .Normal)
    Utilities.createBorder(forView: self, color: UIColor.clearColor(), width: 0, radius: 8)
    if isOrange == true {
        backgroundColor = UIColor.orangeButtonColor()
    } else {
        backgroundColor = UIColor.grayButtonColor()
    }
    let heightConstraint = NSLayoutConstraint(item: self,
                                              attribute: .Height,
                                              relatedBy: .Equal,
                                              toItem: nil,
                                              attribute: .NotAnAttribute,
                                              multiplier: 1,
                                              constant: 30)
    self.addConstraint(heightConstraint)
}

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

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

override func awakeFromNib() {
    super.awakeFromNib()
    setupView()
}

}

Screenshot of button class + isOrange set true

为什么不起作用？代码很好吗？

Answer 1

这适用于我

class WWZButton: UIButton {

    @IBInspectable var isOrange: Bool = true

    private var rightImageView: UIImageView?

    func setupView() {

        rightImageView?.removeFromSuperview()

        rightImageView?.contentMode = .scaleAspectFit

        rightImageView = UIImageView(frame: CGRect(x: frame.width - 35, y: 7.5, width: 40, height: 40))

        rightImageView?.image =  UIImage.init(named: "car1.png")

        rightImageView?.contentMode = .scaleAspectFit
        addSubview(rightImageView!)
        contentHorizontalAlignment = .left
        contentEdgeInsets = UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 0)
        setTitleColor(UIColor.white, for: .normal)
        if isOrange == true {
            backgroundColor = UIColor.green
        } else {
            backgroundColor = UIColor.blue
        }
        let heightConstraint = NSLayoutConstraint(item: self,
                                                  attribute: .height,
                                                  relatedBy: .equal,
                                                  toItem: nil,
                                                  attribute: .notAnAttribute,
                                                  multiplier: 1,
                                                  constant: 100)
        self.addConstraint(heightConstraint)
    }

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

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

    override func awakeFromNib() {
        super.awakeFromNib()
        setupView()
}
}