Xamarin Forms - Show Cancel button in toolbar items instead of Back (iOS)

Question

I want to change the standard Back button in the NavigationBar on iOS to a Cancel button like the \"New contact\" screen in iOS.
I

Answer 1

Do the following in the constructor of the page doing the navigation push. This will work for all pages pushed on to the stack.

NavigationPage.SetBackButtonTitle(this, "Cancel");

Where this is the ContentPage (or any type of page) of course

Answer 2

The standard convention of accomplishing your request is to push a Modal and use ToolBarItems. You can find an example of applying a ToolBarItem to your page on the Xamarin Forums.

Let me know if you need a more concrete example.

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UPDATED WITH EXAMPLE

The two ToolbarItems would like like so:

var cancelItem = new ToolbarItem
{
    Text = "Cancel"
};

var doneItem = new ToolbarItem
{
    Text = "Done"
};

Now you can add these to your view:

this.ToolbarItems.Add(cancelItem);
this.ToolbarItems.Add(doneItem);

You can even bind the CommandProperty:

doneItem.SetBinding(MenuItem.CommandProperty, "DoneClicked");

Or simply handle the event when the user taps the item:

doneItem.Clicked += (object sender, System.EventArgs e) => 
{
    // Perform action
};

Remember to wrap your Modal in a NavigationPage, as the ToolbarItems otherwise will not appear.

Hope this helps.