How can I disable a button if an image has not been edited?

Question

I want to try to disable a post button until an image has been chosen by the user.

However, I have a default image set as a placeholder.I have already managed to disable the post button when a textfield has not filled with information. I haven't, however, found a way to disable the button immediately.Hopefully I have explained myself.

Here's an image of my uiview

func handleBlancInformation(){
    address.addTarget(self, action: #selector(PostViewController.textFieldDidChange), for: UIControlEvents.editingChanged)
    breed.addTarget(self, action: #selector(PostViewController.textFieldDidChange), for: UIControlEvents.editingChanged)
    phone.addTarget(self, action: #selector(PostViewController.textFieldDidChange), for: UIControlEvents.editingChanged)

}


@objc func textFieldDidChange() {
    guard let address = address.text, !address.isEmpty,
            let breed = breed.text, !breed.isEmpty,
            let phone = phone.text, !phone.isEmpty,
            let image = imagePosted.image, !imagePosted.isEqual("placeholder.png")
        else {
        postButton.setTitleColor(UIColor.lightText, for: UIControlState.normal)
            postButton.isEnabled = false
            return
    }
    postButton.setTitleColor(UIColor.white, for: UIControlState.normal)
    postButton.isEnabled = true
}

Answer 1

I would need more code to give an exact solution here, but think about it this way:

Whatever method you are using for the user to choose a new image, that is where you should be enabling the "post" button.

For example, assuming you are using a UIImagePickerViewController to handle picking an image, you will want to enable the "post" button inside of this method, which is part of the UIImagePickerControllerDelegate:

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
     if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
          //Enable button here
     } else {
          //Disable button here
     }
}