XCODE 11.1 & iOS 13
基于 @Jigar Darji 的答案,但是更加安全的实现。
我们首先创建一个可失败的便利初始化器:
extension UIImage {
convenience init?(color: UIColor, size: CGSize) {
UIGraphicsBeginImageContextWithOptions(size, false, 1)
color.set()
guard let ctx = UIGraphicsGetCurrentContext() else { return nil }
ctx.fill(CGRect(origin: .zero, size: size))
guard
let image = UIGraphicsGetImageFromCurrentImageContext(),
let imagePNGData = image.pngData()
else { return nil }
UIGraphicsEndImageContext()
self.init(data: imagePNGData)
}
}
然后我们扩展UISegmentedControl:
extension UISegmentedControl {
func fallBackToPreIOS13Layout(using tintColor: UIColor) {
if #available(iOS 13, *) {
let backGroundImage = UIImage(color: .clear, size: CGSize(width: 1, height: 32))
let dividerImage = UIImage(color: tintColor, size: CGSize(width: 1, height: 32))
setBackgroundImage(backGroundImage, for: .normal, barMetrics: .default)
setBackgroundImage(dividerImage, for: .selected, barMetrics: .default)
setDividerImage(dividerImage,
forLeftSegmentState: .normal,
rightSegmentState: .normal, barMetrics: .default)
layer.borderWidth = 1
layer.borderColor = tintColor.cgColor
setTitleTextAttributes([.foregroundColor: tintColor], for: .normal)
setTitleTextAttributes([.foregroundColor: UIColor.white], for: .selected)
} else {
self.tintColor = tintColor
}
}
}
tintColor
設置,這已經在答案中提到了。 - rmaddy