如何更改MFMessageComposeViewController的导航栏颜色？

Question

I'm using the MFMessageComposeViewController and the MFMailComposeViewController. For some reason only the Mail VC is being styled with the colors I want. Here is how I am styling the Navigation bar in the AppDelegate inside the didFinish func.

let navigationBarAppearace = UINavigationBar.appearance()
    navigationBarAppearace.tintColor = Styles.whiteColor()
    navigationBarAppearace.barTintColor = Styles.inputColor()
    navigationBarAppearace.titleTextAttributes = [NSForegroundColorAttributeName:Styles.whiteColor()]
    navigationBarAppearace.isTranslucent = false

But the Message VC is not being styled by the AppDelegate but I'm not sure why not. I tried this but nothing changed. let controller = MFMessageComposeViewController()

        controller.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: Styles.positiveColor()]
        controller.navigationBar.barTintColor = Styles.negativeColor()
        controller.messageComposeDelegate = self

Is the Message VC styled differently? It still shows up with the default white nav bar and the default blue cancel button.

Here is a photo of the Email VC and the Message VC navigations bars.

As you can see the Message VC is not being styled like the Email VC Navigation bar, but I'm not sure why.

Answer 1

You can create a subclass of UINavigationBar ( MyNavigationBar ) where you set all needed properties.

Then, as MFMessageComposeViewController inherits from UINavigationController , you can use its initialization method

init(navigationBarClass: AnyClass?, toolbarClass: AnyClass?)

and provide MyNavigationBar class as a parameter.

Answer 2

The following is for Swift 3/4.

I tried many ways shown on StackOverflow and other sites, including the subclass way mentioned in the above answer. But could not get success in changing color or changing font color of UIBarButtons.

Then tried different way of presenting the MFMessageComposeViewController.

// Configures and returns a MFMessageComposeViewController instance. This is same with no change.
func configuredMessageComposeViewController() -> MFMessageComposeViewController {
    let messageComposeVC = MFMessageComposeViewController()

    let fileManager:FileManager = FileManager.default
    messageComposeVC.messageComposeDelegate = self  //  Make sure to set this property to self, so that the controller can be dismissed!
    messageComposeVC.recipients = [myContactPhone]

    if fileManager.fileExists(atPath: mySendImagePath) {
        if let image = UIImage(contentsOfFile: mySendImagePath) {
            if UIImagePNGRepresentation(image) != nil
            {
                let imageData1: Data = UIImagePNGRepresentation(image)!
                let success = messageComposeVC.addAttachmentData(imageData1, typeIdentifier: "public.data", filename: "image.JPG")

                if(success)
                {
                }
                else{
                }
            }
        }
    }
    return messageComposeVC
}

// Following code is usage of above.
    if (MFMessageComposeViewController.canSendText()) {
        myMessageComposeVC = configuredMessageComposeViewController()

        // old code - Instead of using following way
        //present(messageComposeVC, animated: true, completion: nil)

        // Used this way to use existing navigation bar.
        if let messageComposeVC = myMessageComposeVC {
            messageComposeVC.willMove(toParentViewController: self)
            messageComposeVC.view.frame = self.view.frame
            self.view.addSubview(messageComposeVC.view)
            self.addChildViewController(messageComposeVC)
            messageComposeVC.didMove(toParentViewController: self)
        }
    } else {
        showSendMMSErrorAlert()
        return
    }

// Following code to remove it when returned through delegate.
func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) {

    // old code
    //controller.dismiss(animated: true, completion: nil)

    controller.willMove(toParentViewController: nil)
    controller.view.removeFromSuperview()
    controller.removeFromParentViewController()

    if(result.rawValue == 0)
    {
        ... error ...
    } else {
        ... success ...
    }
}

Hope, this is useful for persons like me.

Regards.