能否加一个定制导航栏线的颜色功能

[zmh10241015]

[alexiscn]

You can create shadow image with color

extension UIImage {
    class func imageWithColor(color: UIColor, size: CGSize=CGSize(width: 1, height: 1)) -> UIImage? {
        UIGraphicsBeginImageContextWithOptions(size, false, 0)
        color.setFill()
        UIRectFill(CGRect(origin: CGPoint.zero, size: size))
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
}

or you may have a look at WXNavigationBar