Swift 修改TabBar、NavigationBar分割线颜色

有时候系统自带的 TabBar 或 NavigationBar 分割线颜色和我们App里设计的不一致，此时就需要自定义系统的分割线颜色。

修改 TabBar 分割线颜色

tabBar.backgroundImage = UIImage()

tabBar.shadowImage = tabBarShadowImage()

func tabBarShadowImage() -> UIImage? {

  UIGraphicsBeginImageContextWithOptions(CGSize(width: UIScreen.width(), height: 0.5), false, 0)

  let path = UIBezierPath.init(rect: CGRect.init(x: 0, y: 0, width: UIScreen.width(), height: 0.5))

  UIColor.red.setFill()// 自定义TabBar分割线颜色

  path.fill()

  let image = UIGraphicsGetImageFromCurrentImageContext()

  UIGraphicsEndImageContext()

  return image

}

修改 NavigationBar 分割线颜色

navigationBar.setBackgroundImage(UIImage(), for: .default)

navigationBar.shadowImage = navBarShadowImage()

func navBarShadowImage() -> UIImage? {

  UIGraphicsBeginImageContextWithOptions(CGSize(width: UIScreen.width(), height: 0.5), false, 0)

  let path = UIBezierPath.init(rect: CGRect.init(x: 0, y: 0, width: UIScreen.width(), height: 0.5))

  UIColor.blue.setFill()// 自定义NavigationBar分割线颜色

  path.fill()

  let image = UIGraphicsGetImageFromCurrentImageContext()

  UIGraphicsEndImageContext()

  return image

}