SwiftTheme是目前iOS平台上最方便的换肤框架，而且功能丰富、高性能、可扩展，提供一个全新的换肤解决方案，使用纯Swift编写，但完全兼容OC。
框架网上可以搜到,咱们今天主要讲一下用法.
1.先定义一些主题颜色
let globalBackgroundColorPicker = ThemeColorPicker(colors: "#EB4F38","#F4C600","#56ABE4","#ECF0F1")
//在MyThemes中设置主题 case Red = 0 case Yello = 1 case Blue = 2 case Night = 3
2.把需要换肤的控件都加进来
//UIButton btn.theme_backgroundColor = globalBackgroundColorPicker btn.theme_setTitleColor(ThemeColorPicker(colors: "#000","#FFF"),forState: .Normal)
<pre name="code" class="objc">//UILabellabel.theme_textColor = globalBackgroundColorPicker
//UINavigationBar navigationBar.theme_tintColor = globalBarTintColorPicker navigationBar.theme_barTintColor = globalBarTintColorPicker
//UIImage nightIcon.theme_image = ThemeImagePicker(names: "icon_night_dark","icon_night_dark","icon_night_light")
3.换肤
//循环换肤
MyThemes.switchToNext()
//切换到哪个主题
MyThemes.switchTo(MyThemes.Blue)
//夜晚模式
MyThemes.switchToNight(true)
plist 方式
以下为用法示例：view.theme_backgroundColor = ThemeColorPicker(keyPath: "Global.backgroundColor") imageView.theme_image = ThemeImagePicker(keyPath: "SelectedThemeCell.iconImage")
上面用到的
plist、
image展示如下：