Use this class if you're a horrible person that wants to change the colour of an iOS status bar. If the status bar changes in any way, you have to do it again. Have fun.

TintMyStatusBar.swift

final class TintMyStatusBar {

  static func to(_ colour: UIColor) {
    let sbw = UIApplication.shared.value(forKey: "statusBarWindow") as! UIWindow
    for statusbar in sbw.subviews {
      for bgfg in statusbar.subviews {
        for itemView in bgfg.subviews {
          let image = itemView.layer.contents as! CGImage
          itemView.layer.contents = self.tint(image: image, toColour: colour)
        }
      }
    }
  }

  private static func tint(image: CGImage, toColour colour: UIColor) -> CGImage {
    let maskImage = image
    let width = image.width
    let height = image.height
    let bounds = CGRect(x: 0, y: 0, width: width, height: height)
    let colorSpace = CGColorSpaceCreateDeviceRGB()
    let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)
    let bitmapContext = CGContext(
      data: nil,
      width: Int(width),
      height: Int(height),
      bitsPerComponent: 8,
      bytesPerRow: 0,
      space: colorSpace,
      bitmapInfo: bitmapInfo.rawValue)
    bitmapContext?.clip(to: bounds, mask: maskImage)
    bitmapContext?.setFillColor(colour.cgColor)
    bitmapContext?.fill(bounds)
    let cgImage = bitmapContext?.makeImage()
    return cgImage!
  }

}