Open the xcode project.

def cmd_xcode(self, *args):
        '''Open the xcode project.
        '''
        app_name = self.buildozer.namify(self.buildozer.config.get('app',
            'package.name'))
        app_name = app_name.lower()

        ios_dir = ios_dir = join(self.buildozer.platform_dir, 'kivy-ios')
        self.buildozer.cmd('open {}.xcodeproj'.format(
            app_name), cwd=join(ios_dir, '{}-ios'.format(app_name)))