EMCCountryPickerController

EMCCountryPickerController is a view controller that allow users to choose a country from a searchable list. The available countries are taken from the ISO 3166-1 standard, whose ISO 3166-1 alpha-2 two-letter country codes are used by the API to represent countries.

Features

This library provides the following features:

• A country can be selected from a list in a table view.
• The list can be searched using a search bar.
• Country flags are displayed in the image view of a table cell and they can optionally be hidden.
• The flag size can be customised.
• The flag border color and size can be customised and optionally hidden.
• All the countries assigned a ISO 3166-1 alpha-2 two-letter code are available.
• The list of countries presented by the controller can be filtered.
• Countries are localised through the NSLocale API methods

The anatomy of the view presented by EMCCountryPickerController is the following:

• A search bar is anchored to the bottom of the top layout guide.
• A table view is anchored to the bottom of the search bar and to the top of the bottom layout guide.
• The view is a full screen view designed to be presented modally.

The table view presents the list of countries, sorted by name, in the current language of the user, if available, or in English. A public domain image of a country's flag is shown at the left of the country name.

Prerequisites

This library has been built with Xcode 5.1.1 using iOS 7.1 as a build target. This library requires iOS >= 6.1.

This library requires ARC (Automatic Reference Counting) and compilation will fail if ARC support is not available.

Usage

The EMCCountryPickerController must be presented modally by the presenting view controller. The EMCCountryPickerController won't dismiss itself when a country is chosen. Instead, EMCCountryPickerController instance will rely on a delegate conforming to the EMCCountryDelegate protocol to receive the country selection event and to dismiss it. The delegate can be set either in Interface Builder using the countryDelegate outlet or programmatically using the countryDelegate property. When using a storyboard, since an outlet cannot be connected to a controller in another controller, the controller setup is usually performed in prepareForSegue:sender::

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"openCountryPicker"])
    {
        EMCCountryPickerController *countryPicker = segue.destinationViewController;
        countryPicker.countryDelegate = self;
    }
}

The EMCCountryDelegate protocol defines one selector which is invoked when a country has been selected:

- (void)countryController:(id)sender didSelectCountry:(EMCCountry *)chosenCountry;

The presenting view controller usually conforms to this protocol, receives the notification and dismisses the EMCCountryPickerController instance:

- (void)countryController:(id)sender didSelectCountry:(EMCCountry *)chosenCountry;
{
    // Do something with chosenCountry
    [self dismissViewControllerAnimated:YES completion:nil];
}

Searching Countries

The view provides a search bar that can be used to filter countries by name, as shown in the following screenshot.

Selecting the Set of Countries to Be Displayed

Sometimes users need to restrict the set of countries to choose from and that can be accomplished using the property

@property (copy) NSSet *availableCountryCodes;

Users can pass the set of ISO 3166-1 alpha-2 country codes of the countries to be shown by this controller. If a country code is not valid the controller fails throwing an exception.

The following code fragment restricts the set of displayed countries to France, Italy, Spain and United States, as shown in the following screenshot.

countryPicker.availableCountryCodes = [NSSet setWithObjects:@"IT", @"ES", @"US", @"FR", nil];

Showing and Hiding Flags

Flags are shown by default and can be disabled using the property BOOL showFlags.

Flag Size

Flag size can be customised using the flagSize property:

countryPicker.flagSize = 20;

The table view cell row height will be adjusted accordingly.

Flag Borders

By default a grey .5 border is drawn around a flag in order to improve its visual appearance over the default white background. The border can be configured using the following properties:

• BOOL drawFlagBorder: enables the flag border. Defaults to YES.
• UIColor *flagBorderColor: sets the border color. Defaults to [UIColor grayColor].
• CGFloat flagBorderWidth: sets the border width. Defaults to 0.5f.

Localised Country Names

The EMCCountryPickerController localises country names employing the NSLocale API methods.

Demo Code

A demo project named EMCCountryPickerControllerDemo using a storyboard and highlighting the library major features is shipped with the library code.

Installation with CocoaPods

EMCCountryPickerController is available through CocoaPods and a dependency to it can be added to your Podfile:

pod 'EMCCountryPickerController', ~> '1.0'

Build the Software

The recommended way to get the sources of EMCCountryPickerController in order to build it on your system is getting a release tarball.

Bug Reports

Bug reports can be opened at the official GitHub repository.

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Copyright (c) 2014-2015 Enrico Maria Crisostomo

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