iOS13 暗黑模式(Dark Mode)适配

• 通过 UITraitCollection.currentTraitCollection.userInterfaceStyle == UIUserInterfaceStyleDark 进行判断

• 示例 - Objective-C

  if (@available(iOS 13.0, *)) {
      if (UITraitCollection.currentTraitCollection.userInterfaceStyle == UIUserInterfaceStyleDark) {
        // dark mode
      }
      else {
        // light mode
      }
  }
  

• 示例 - Swift

  if #available(iOS 13.0, *) {
      if UITraitCollection.current.userInterfaceStyle == UIUserInterfaceStyle.dark {
          // dark mode
      }
      else {
          // light mode
      }
  }
  

extension UIColor {

  @objc static func wb_dynamicProvider(lightColor: UIColor, darkColor: UIColor) -> UIColor {
      if #available(iOS 13.0, *) {
          let color: UIColor = UIColor.init { (traitCollection: UITraitCollection) -> UIColor in
              if traitCollection.userInterfaceStyle == UIUserInterfaceStyle.dark {
                  return darkColor
              }
              return lightColor
          }
          return color
      } else {
          return lightColor
      }
  }
}

  extension UIActivityIndicatorView {
  @objc static func wb_largeStyle() -> Style {
      if #available(iOS 13.0, *) {
          return Style.large
      } else {
          return Style.whiteLarge
      }
  }
  
  @objc static func wb_mediumStyle() -> Style {
      if #available(iOS 13.0, *) {
          return Style.medium
      } else {
          return Style.gray
      }
  }
}

- (UIBlurEffectStyle)wb_blurEffectStyle {
  UIBlurEffectStyle style;
  #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
      if (@available(iOS 13.0, *)) {
          if (UITraitCollection.currentTraitCollection.userInterfaceStyle == UIUserInterfaceStyleDark) {
              style = UIBlurEffectStyleSystemThinMaterialDark;
          }
          else {
              style = UIBlurEffectStyleSystemThinMaterialLight;
          }
      } else
  #endif
      {
  #if __IPHONE_OS_VERSION_MIN_REQUIRED < 130000
          style = UIBlurEffectStyleExtraLight;
  #endif
      }
  return style;
}