ios - UIButton 边框颜色默认为黑色。如何将其更改为用于设置按钮文本标题的默认(蓝色)颜色？

Question

我创建了一个 UIButton:

testNavigationButton.setTitle("Test", forState: .Normal)
testNavigationButton.layer.borderWidth = 1

我尝试将颜色更改为:

testNavigationButton.layer.borderColor = UIColor.blueColor().CGColor

但是边框的颜色与用于设置按钮标题的默认阴影不同的蓝色阴影。这是什么阴影？如何将边框颜色更改为这种颜色？

Answer 1

您可以使用以下方法获取文本的颜色

let textColor = button.titleLabel?.textColor

然后像这样将它分配给您的 borderColor:

button.layer.borderColor = textColor!.CGColor

顺便说一句，根据我的测试，蓝色是 #007aff 您可以使用以下方法初始化它:

let color = UIColor(red: 0, green: 0.478, blue: 1, alpha: 1)

---

更新

class MyButton: UIButton {

    private let normalColor = UIColor(red: 0, green: 0.478, blue: 1, alpha: 1)
    private let highlightedColor = UIColor(red: 0, green: 0.478, blue: 1, alpha: 0.3)

    override var highlighted: Bool {
        willSet {
            if newValue != highlighted {
                let anim = CABasicAnimation(keyPath: "borderColor")
                anim.fromValue = newValue ? normalColor.CGColor : highlightedColor.CGColor
                anim.toValue = newValue ? highlightedColor.CGColor : normalColor.CGColor
                layer.borderColor = newValue ? highlightedColor.CGColor : normalColor.CGColor
                anim.duration = CATransaction.animationDuration()
                anim.timingFunction = CATransaction.animationTimingFunction()
                layer.addAnimation(anim, forKey: "MyButton.BorderColor")
            }
        }
    }
}