Country Drop Down List for Web Forms

<select>
    <option value="  " selected>(please select a country)</option>
    <option value="--">none</option>
    <option value="AF">Afghanistan</option>
    <option value="AL">Albania</option>
    <option value="DZ">Algeria</option>
    <option value="AS">American Samoa</option>
    <option value="AD">Andorra</option>
    <option value="AO">Angola</option>
    <option value="AI">Anguilla</option>
    <option value="AQ">Antarctica</option>
    <option value="AG">Antigua and Barbuda</option>
    <option value="AR">Argentina</option>
    <option value="AM">Armenia</option>
    <option value="AW">Aruba</option>
    <option value="AU">Australia</option>
    <option value="AT">Austria</option>
    <option value="AZ">Azerbaijan</option>
    <option value="BS">Bahamas</option>
    <option value="BH">Bahrain</option>
    <option value="BD">Bangladesh</option>
    <option value="BB">Barbados</option>
    <option value="BY">Belarus</option>
    <option value="BE">Belgium</option>
    <option value="BZ">Belize</option>
    <option value="BJ">Benin</option>
    <option value="BM">Bermuda</option>
    <option value="BT">Bhutan</option>
    <option value="BO">Bolivia</option>
    <option value="BA">Bosnia and Herzegowina</option>
    <option value="BW">Botswana</option>
    <option value="BV">Bouvet Island</option>
    <option value="BR">Brazil</option>
    <option value="IO">British Indian Ocean Territory</option>
    <option value="BN">Brunei Darussalam</option>
    <option value="BG">Bulgaria</option>
    <option value="BF">Burkina Faso</option>
    <option value="BI">Burundi</option>
    <option value="KH">Cambodia</option>
    <option value="CM">Cameroon</option>
    <option value="CA">Canada</option>
    <option value="CV">Cape Verde</option>
    <option value="KY">Cayman Islands</option>
    <option value="CF">Central African Republic</option>
    <option value="TD">Chad</option>
    <option value="CL">Chile</option>
    <option value="CN">China</option>
    <option value="CX">Christmas Island</option>
    <option value="CC">Cocos (Keeling) Islands</option>
    <option value="CO">Colombia</option>
    <option value="KM">Comoros</option>
    <option value="CG">Congo</option>
    <option value="CD">Congo, the Democratic Republic of the</option>
    <option value="CK">Cook Islands</option>
    <option value="CR">Costa Rica</option>
    <option value="CI">Cote d'Ivoire</option>
    <option value="HR">Croatia (Hrvatska)</option>
    <option value="CU">Cuba</option>
    <option value="CY">Cyprus</option>
    <option value="CZ">Czech Republic</option>
    <option value="DK">Denmark</option>
    <option value="DJ">Djibouti</option>
    <option value="DM">Dominica</option>
    <option value="DO">Dominican Republic</option>
    <option value="TP">East Timor</option>
    <option value="EC">Ecuador</option>
    <option value="EG">Egypt</option>
    <option value="SV">El Salvador</option>
    <option value="GQ">Equatorial Guinea</option>
    <option value="ER">Eritrea</option>
    <option value="EE">Estonia</option>
    <option value="ET">Ethiopia</option>
    <option value="FK">Falkland Islands (Malvinas)</option>
    <option value="FO">Faroe Islands</option>
    <option value="FJ">Fiji</option>
    <option value="FI">Finland</option>
    <option value="FR">France</option>
    <option value="FX">France, Metropolitan</option>
    <option value="GF">French Guiana</option>
    <option value="PF">French Polynesia</option>
    <option value="TF">French Southern Territories</option>
    <option value="GA">Gabon</option>
    <option value="GM">Gambia</option>
    <option value="GE">Georgia</option>
    <option value="DE">Germany</option>
    <option value="GH">Ghana</option>
    <option value="GI">Gibraltar</option>
    <option value="GR">Greece</option>
    <option value="GL">Greenland</option>
    <option value="GD">Grenada</option>
    <option value="GP">Guadeloupe</option>
    <option value="GU">Guam</option>
    <option value="GT">Guatemala</option>
    <option value="GN">Guinea</option>
    <option value="GW">Guinea-Bissau</option>
    <option value="GY">Guyana</option>
    <option value="HT">Haiti</option>
    <option value="HM">Heard and Mc Donald Islands</option>
    <option value="VA">Holy See (Vatican City State)</option>
    <option value="HN">Honduras</option>
    <option value="HK">Hong Kong</option>
    <option value="HU">Hungary</option>
    <option value="IS">Iceland</option>
    <option value="IN">India</option>
    <option value="ID">Indonesia</option>
    <option value="IR">Iran (Islamic Republic of)</option>
    <option value="IQ">Iraq</option>
    <option value="IE">Ireland</option>
    <option value="IL">Israel</option>
    <option value="IT">Italy</option>
    <option value="JM">Jamaica</option>
    <option value="JP">Japan</option>
    <option value="JO">Jordan</option>
    <option value="KZ">Kazakhstan</option>
    <option value="KE">Kenya</option>
    <option value="KI">Kiribati</option>
    <option value="KP">Korea, Democratic People's Republic of</option>
    <option value="KR">Korea, Republic of</option>
    <option value="KW">Kuwait</option>
    <option value="KG">Kyrgyzstan</option>
    <option value="LA">Lao People's Democratic Republic</option>
    <option value="LV">Latvia</option>
    <option value="LB">Lebanon</option>
    <option value="LS">Lesotho</option>
    <option value="LR">Liberia</option>
    <option value="LY">Libyan Arab Jamahiriya</option>
    <option value="LI">Liechtenstein</option>
    <option value="LT">Lithuania</option>
    <option value="LU">Luxembourg</option>
    <option value="MO">Macau</option>
    <option value="MK">Macedonia, The Former Yugoslav Republic of</option>
    <option value="MG">Madagascar</option>
    <option value="MW">Malawi</option>
    <option value="MY">Malaysia</option>
    <option value="MV">Maldives</option>
    <option value="ML">Mali</option>
    <option value="MT">Malta</option>
    <option value="MH">Marshall Islands</option>
    <option value="MQ">Martinique</option>
    <option value="MR">Mauritania</option>
    <option value="MU">Mauritius</option>
    <option value="YT">Mayotte</option>
    <option value="MX">Mexico</option>
    <option value="FM">Micronesia, Federated States of</option>
    <option value="MD">Moldova, Republic of</option>
    <option value="MC">Monaco</option>
    <option value="MN">Mongolia</option>
    <option value="MS">Montserrat</option>
    <option value="MA">Morocco</option>
    <option value="MZ">Mozambique</option>
    <option value="MM">Myanmar</option>
    <option value="NA">Namibia</option>
    <option value="NR">Nauru</option>
    <option value="NP">Nepal</option>
    <option value="NL">Netherlands</option>
    <option value="AN">Netherlands Antilles</option>
    <option value="NC">New Caledonia</option>
    <option value="NZ">New Zealand</option>
    <option value="NI">Nicaragua</option>
    <option value="NE">Niger</option>
    <option value="NG">Nigeria</option>
    <option value="NU">Niue</option>
    <option value="NF">Norfolk Island</option>
    <option value="MP">Northern Mariana Islands</option>
    <option value="NO">Norway</option>
    <option value="OM">Oman</option>
    <option value="PK">Pakistan</option>
    <option value="PW">Palau</option>
    <option value="PA">Panama</option>
    <option value="PG">Papua New Guinea</option>
    <option value="PY">Paraguay</option>
    <option value="PE">Peru</option>
    <option value="PH">Philippines</option>
    <option value="PN">Pitcairn</option>
    <option value="PL">Poland</option>
    <option value="PT">Portugal</option>
    <option value="PR">Puerto Rico</option>
    <option value="QA">Qatar</option>
    <option value="RE">Reunion</option>
    <option value="RO">Romania</option>
    <option value="RU">Russian Federation</option>
    <option value="RW">Rwanda</option>
    <option value="KN">Saint Kitts and Nevis</option>
    <option value="LC">Saint LUCIA</option>
    <option value="VC">Saint Vincent and the Grenadines</option>
    <option value="WS">Samoa</option>
    <option value="SM">San Marino</option>
    <option value="ST">Sao Tome and Principe</option>
    <option value="SA">Saudi Arabia</option>
    <option value="SN">Senegal</option>
    <option value="SC">Seychelles</option>
    <option value="SL">Sierra Leone</option>
    <option value="SG">Singapore</option>
    <option value="SK">Slovakia (Slovak Republic)</option>
    <option value="SI">Slovenia</option>
    <option value="SB">Solomon Islands</option>
    <option value="SO">Somalia</option>
    <option value="ZA">South Africa</option>
    <option value="GS">South Georgia and the South Sandwich Islands</option>
    <option value="ES">Spain</option>
    <option value="LK">Sri Lanka</option>
    <option value="SH">St. Helena</option>
    <option value="PM">St. Pierre and Miquelon</option>
    <option value="SD">Sudan</option>
    <option value="SR">Suriname</option>
    <option value="SJ">Svalbard and Jan Mayen Islands</option>
    <option value="SZ">Swaziland</option>
    <option value="SE">Sweden</option>
    <option value="CH">Switzerland</option>
    <option value="SY">Syrian Arab Republic</option>
    <option value="TW">Taiwan, Province of China</option>
    <option value="TJ">Tajikistan</option>
    <option value="TZ">Tanzania, United Republic of</option>
    <option value="TH">Thailand</option>
    <option value="TG">Togo</option>
    <option value="TK">Tokelau</option>
    <option value="TO">Tonga</option>
    <option value="TT">Trinidad and Tobago</option>
    <option value="TN">Tunisia</option>
    <option value="TR">Turkey</option>
    <option value="TM">Turkmenistan</option>
    <option value="TC">Turks and Caicos Islands</option>
    <option value="TV">Tuvalu</option>
    <option value="UG">Uganda</option>
    <option value="UA">Ukraine</option>
    <option value="AE">United Arab Emirates</option>
    <option value="GB">United Kingdom</option>
    <option value="US">United States</option>
    <option value="UM">United States Minor Outlying Islands</option>
    <option value="UY">Uruguay</option>
    <option value="UZ">Uzbekistan</option>
    <option value="VU">Vanuatu</option>
    <option value="VE">Venezuela</option>
    <option value="VN">Viet Nam</option>
    <option value="VG">Virgin Islands (British)</option>
    <option value="VI">Virgin Islands (U.S.)</option>
    <option value="WF">Wallis and Futuna Islands</option>
    <option value="EH">Western Sahara</option>
    <option value="YE">Yemen</option>
    <option value="YU">Yugoslavia</option>
    <option value="ZM">Zambia</option>
    <option value="ZW">Zimbabwe</option>
</select>

iOS Core Location GPS

In this tutorial you will learn how to access the raw Core Location data, including the iPhone’s GPS coordinates and speed of travel. We will be creating a project that incorporates the Core Location framework. We will implement a custom class that handles our Core Location and sets up a custom protocol for other classes to adhere to in order to receive messages with our Core Location data updates. You are expected to have a decent understanding of Objective-C.

First thing we must create a new iOS project. In Xcode, click (File->New Project). Under (iPhone OS->Application) select View-based Application and save it as CoreLocationDemo or something similar.

Right click on the “Frameworks” group and select (Add->Existing Frameworks). Select CoreLocation.framework from the list of available frameworks. We must manually do this in order to access the Core Location methods, Xcode does not automatically know to do use this framework and you will receive many errors when compiling the code.

We need to create a class to act as a Core Location Manager Delegate. This class will receive messages from the Core Location framework containing the raw data and will then pass this to our view controller class later on.

Create a new file (File->New File) and create a new Objective-C class (iPhone OS-> Cocoa Touch Class-> Objective-C class) and make sure it is a subclass of NSObject. Name it something like CoreLocationController and make sure “Also create .h file” is checked.

A lot of things need to happen in this class, but luckily it isn’t much code.

First, we need to setup some things in our .h file. Before anything, we must include our Core Location header file or everything will break on build.

From CoreLocationController.h

#import <CoreLocation/CoreLocation.h>

We will declare a new protocol that will allow anything using our class to adhere to and receive updated Core Location data. For that, we use the following code placed above our interface declaration and below our imports:

From CoreLocationController.h

@protocol CoreLocationControllerDelegate 
@required
- (void)locationUpdate:(CLLocation *)location; // Our location updates are sent here
- (void)locationError:(NSError *)error; // Any errors are sent here
@end

Now we must define our class and make it adhere to the CLLocationManagerDelegate protocol:

From CoreLocationController.h

@interface CoreLocationController : NSObject <CLLocationManagerDelegate> {
	CLLocationManager *locMgr;
	id delegate;
}
 
@property (nonatomic, retain) CLLocationManager *locMgr;
@property (nonatomic, assign) id delegate;
 
@end

We define an instance variable of CLLocationManager type named locMgr.

Apple’s description of CLLocationManager:

The CLLocationManager class defines the interface for configuring the delivery of location- and heading-related events to your application. You use an instance of this class to establish the parameters that determine when location and heading events should be delivered and to start and stop the actual delivery of those events. You can also use a location manager object to retrieve the most recent location and heading data.

We also define “delegate” if type “id” which allows any class implementing our CoreLocationControllerDelegate protocol to register itself as the delegate.

In the .m file of our new class we need to synthesize our instance variables and create three methods.

First the variables:

From CoreLocationController.m

@synthesize locMgr, delegate;

Now the methods, the first being “init” which will create a new instance of our CLLocationManager and set the delegate as “self.” I am not going into how the rest works, you should be up to speed on Objective-C before reading this tutorial.

From CoreLocationController.m

- (id)init {
	self = [super init];
 
	if(self != nil) {
		self.locMgr = [[[CLLocationManager alloc] init] autorelease]; // Create new instance of locMgr
		self.locMgr.delegate = self; // Set the delegate as self.
	}
 
	return self;
}

The next two methods are callbacks from the CLLocationManagerDelegate protocol. They receive updates of Core Location data such as our GPS coords and speed of travel, as well as handle error messages. All we are doing is passing the received data to the whatever class registered itself as the delegate. Nothing more. If no class registered as the delegate, they do nothing. Finally, we have delloc that cleans up and releases locMgr.

From CoreLocationController.m

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
	if([self.delegate conformsToProtocol:@protocol(CoreLocationControllerDelegate)]) {  // Check if the class assigning itself as the delegate conforms to our protocol.  If not, the message will go nowhere.  Not good.
		[self.delegate locationUpdate:newLocation];
	}
}
 
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
	if([self.delegate conformsToProtocol:@protocol(CoreLocationControllerDelegate)]) {  // Check if the class assigning itself as the delegate conforms to our protocol.  If not, the message will go nowhere.  Not good.
		[self.delegate locationError:error];
	}
}
 
- (void)dealloc {
	[self.locMgr release];
	[super dealloc];
}

Open up the view controller .h file and import the core location class .h file. It is important for the view controller to adhere to our newly created protocol. Define an instance variable of CoreLocationController type as well as an IBOutlet for a UILabel to display the data.

CoreLocationDemoViewController.h

#import <UIKit/UIKit.h>
 
#import "CoreLocationController.h"
 
@interface CoreLocationDemoViewController : UIViewController <CoreLocationControllerDelegate> {
	CoreLocationController *CLController;
	IBOutlet UILabel *locLabel;
}
 
@property (nonatomic, retain) CoreLocationController *CLController;
 
@end

Open the view controller nib file in interface builder and create a new UILabel. Ctrl-Click-Drag from File’s Owner to the UILabel and select the IBOutlet we just created. Save and quit interface builder.

Now on to our view controller .m file.

In the viewDidLoad method initialize CLController, set CLController’s delegate as “self,” and call locMgr’s method startUpdatingLocation. The first of the three should be self explanatory, no need to go into why. If you’re confused, you need to brush up on your Objective-C then come back here. The second is to assign our view controller as the delegate in our CoreLocationController class. If you haven’t already figured it out yet, I will explain it. If you remember in our CoreLocationController.m file we used [self.delegate doSomething]. In the init of that file we set the delegate to itself as to prevent a call to nothing, so basically you have a method recursively calling itself until we set the delegate as our view controller. Of course that means we now must implement locationUpdate:newLocation and locationError:error in our view controller .m file. In these two methods we will set the UILabel text to the “description” property of the CLLocation and NSError. We can go and pick out individual details from the CLLocation but for now we will just print out the whole thing as one long semi-garbled string which is what “description” contains.

From CoreLocationDemoViewController.m

- (void)viewDidLoad {
    [super viewDidLoad];
 
	CLController = [[CoreLocationController alloc] init];
	CLController.delegate = self;
	[CLController.locMgr startUpdatingLocation];
}
 
- (void)locationUpdate:(CLLocation *)location {
	locLabel.text = [location description];
}
 
- (void)locationError:(NSError *)error {
	locLabel.text = [error description];
}
 
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

Of course it wouldn’t be complete with proper memory management:

From CoreLocationDemoViewController.m

- (void)dealloc {
	[CLController release];
    [super dealloc];
}

And that’s it! Compile and run on your iPhone. Try walking down the street, you can see the data update in real time.