Question

我有以下UIButton：

// create footerView
let footerView: UIView = UIView()
footerView.backgroundColor = UIColor.yellowColor()
self.view.addSubview(footerView)

footerView.snp_makeConstraints { (make) -> Void in
  make.left.equalTo(self.view.snp_left)
  make.right.equalTo(self.view.snp_right)
  make.height.equalTo(self.footerHeight)
  make.bottom.equalTo(self.view.snp_bottom)
}

let footerButton: UIButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton
footerButton.setTitle("OK", forState: UIControlState.Normal)
footerButton.backgroundColor = UIColor.redColor()
footerButton.tintColor = UIColor.whiteColor()
footerButton.setTitleColor(UIColor.grayColor(), forState: UIControlState.Highlighted)
footerView.addSubview(footerButton)

footerButton.snp_makeConstraints { (make) -> Void in
  make.center.equalTo(footerView)
  make.left.equalTo(footerView.snp_left).offset(45)
  make.right.equalTo(footerView.snp_right).offset(-45)
}

编辑：我可以使用

footerButton.setBackgroundImage(redImage, forState: UIControlState.Highlighted)

但如果我按下按钮，这会破坏自动布局和边框半径。

如何更改UIControlState.Highlighted上按钮的backgroundColor？

Answer 1

没有-setBackgroundColor:forState方法。您可以创建纯色背景图像（以编程方式或包含在资源中），然后使用

- setBackgroundImage:forState:

Answer 2

@ stephan1001我已经尝试过这段代码并且可以正常使用

class ViewController: UIViewController {

var footerHeight = 70.0

override func viewDidLoad() {
    super.viewDidLoad()
    configUI()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

func configUI(){
    // create footerView
    let footerView: UIView = UIView()
    footerView.backgroundColor = UIColor.yellowColor()
    self.view.addSubview(footerView)

    footerView.snp_makeConstraints { (make) -> Void in
        make.left.equalTo(self.view.snp_left)
        make.right.equalTo(self.view.snp_right)
        make.height.equalTo(self.footerHeight)
        make.bottom.equalTo(self.view.snp_bottom)
    }

    let footerButton: MyButton = MyButton.buttonWithType(UIButtonType.Custom) as! MyButton
    footerButton.setTitle("OK", forState: UIControlState.Normal)
    footerButton.backgroundColor = UIColor.redColor()
    footerButton.tintColor = UIColor.whiteColor()
    footerButton.setTitleColor(UIColor.grayColor(), forState: UIControlState.Highlighted)
    footerView.addSubview(footerButton)

    footerButton.snp_makeConstraints { (make) -> Void in
        make.center.equalTo(footerView)
        make.left.equalTo(footerView.snp_left).offset(45)
        make.right.equalTo(footerView.snp_right).offset(-45)
    }
}


}

class MyButton: UIButton{
    override var highlighted: Bool {
        willSet(newValue) {
            if ( newValue == true ){
                self.backgroundColor = UIColor.greenColor()
            } else{
                self.backgroundColor = UIColor.redColor()
            }
        }

    }
}

在UIControlState.Highlighted上更改UIButton backgroundColor？

2 个答案: