swift 字体自适应，宽高自适应

let kScreenWidth = UIScreen.main.bounds.width

let kScreenHeight = UIScreen.main.bounds.height

public func FitWidth(_ width: CGFloat) -> CGFloat {

    return width * kScreenWidth / 375.0

}

public func FitHeight(_ height: CGFloat) -> CGFloat {

    return height * kScreenHeight / 667.0

}

public func FitFont(_ font: CGFloat) -> UIFont {

    return UIFont(name: "PingFangSC-Regular", size: font * kScreenWidth / 375.0)!

}