iOS设置状态栏、导航栏字体颜色为白色

状态栏：
在info.plist中添加如下配置：

屏幕快照 2018-12-22 下午1.49.22.png

屏幕快照 2018-12-22 下午1.49.32.png

导航栏：(swift4.2)

        UINavigationBar.appearance().barTintColor = [UIColor colorWithRed:0.612 green:0.345 blue:0.929 alpha:1.00] //主题色
        UINavigationBar.appearance().tintColor = UIColor.white
        UINavigationBar.appearance().isTranslucent = true
        let attributes = [
            NSAttributedString.Key.font: UIFont.systemFont(ofSize: 19.0),
            NSAttributedString.Key.foregroundColor: UIColor.white
        ]

        UINavigationBar.appearance().titleTextAttributes = attributes