ios - 如何在UIButton 的gradientLayer 前面设置图片和文字？

Question

我的代码是这样的:

    pickerCountry = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton
    pickerCountry.frame = CGRectMake(self.view.frame.size.width/2 - pickerCountry.frame.size.width, 50, 100, 100)
    pickerCountry.center.x = self.view.center.x
    pickerCountry.setTitle("Start1", forState: UIControlState.Normal)
    pickerCountry.setImage(UIImage(named: "Britain_mdpi.png"), forState: UIControlState.Normal)
    pickerCountry.tintColor = UIColor.blackColor()
    pickerCountry.titleLabel?.tintColor = UIColor.blackColor()
    pickerCountry.layer.cornerRadius = 2

    pickerCountry.imageEdgeInsets = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 200)
    pickerCountry.titleEdgeInsets = UIEdgeInsets(top: 5, left: 50, bottom: 5, right: 5)

    pickerCountry.addTarget(self, action: "countryPicker:", forControlEvents: UIControlEvents.TouchUpInside)
    ContentView.addSubview(pickerCountry)

然后我在 func 中添加渐变，如下所示:

    let colorTop = UIColor(netHex:0xffffff).CGColor
    let colorBottom = UIColor(netHex:0xebebeb).CGColor

    pickerCountryGradientLayer.masksToBounds = true
    pickerCountryGradientLayer.cornerRadius = pickerCountry.layer.cornerRadius
    pickerCountryGradientLayer.colors = [ colorTop, colorBottom]
    pickerCountryGradientLayer.locations = [ 0.0, 1.0]

    pickerCountry.layer.insertSublayer(pickerCountryGradientLayer, below: pickerCountry.imageView?.layer)

当我使用最后一行 insertSublayer 时，我看到了图像，我也看到了标题，但它的颜色是白色的，或者其他的，有点奇怪。我将颜色设置为黑色，所以如果这确实有效，我该如何更改标题颜色？

我尝试使用 addSublayer，但我看到的是标题标签，而不是图像。

Answer 1

您提到您已经设置了UIButton 的标题颜色，但我看不到您在哪里设置UIButton 的标题颜色。使用:

pickerCountry.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)