Country selector

[marbetschar]

This pull request adds the ability to define a country selector using the newly added var countrySelectorRow : PushRow<String>? as discussed in #3.

To make use of this you'll define a PostalAddressRow like this (see the Example project):

<<< PostalAddressRow() {
	$0.streetPlaceholder = "Street"
	$0.statePlaceholder = "State"
	$0.cityPlaceholder = "City"
	$0.countryPlaceholder = "Country"
	$0.postalCodePlaceholder = "Zip code"
	
	$0.countrySelectorRow = PushRow<String>(){
		$0.options = ["GB","US"]
		$0.displayValueFor = { guard let isoCode = $0 else{ return nil }
			return Locale.current.localizedString(forRegionCode: isoCode)
		}
	}
}

If you want to use custom Nibs, you'll have to add a UITableView linked with @IBOutlet open var countrySelectorTableView: UITableView?.

And this is how it looks like:

[marbetschar]

Any chance we can get this merged?

[mats-claassen]

We should use 4.1 now

[mats-claassen]

Could you align this line to its context? Maybe if you set Xcode to replace tabs with spaces

[mats-claassen]

Please remove trailing whitespace

[mats-claassen]

Same here for indentation.

[mats-claassen]

Hi @marbetschar, sorry for the late reply.

Why did you use a UITableView with a PushRow instead or a simple button that pushes a SelectorViewController?

[marbetschar]

@mats-claassen main idea was to provide a way for further customization, using native Eureka features .... but looking back it might not made too much sense probably...?