Attaching UITextField to NSUserDefaults - json

Question

I am a beginner & I am trying to figure out how to upload text from a textfield to a server along with coordinates but I need to add the textfield to userdefaults.
The UITextfield is in my ViewController, while the coordinates & post to server are in a separate object class.
A tutorial or sample code will be very helpful.
Below, I have attached the relevant code I am using to upload the coordinates.
What I need is help on adding and uploading text from UITextfield in another class to the code below.
Singleton.m
#implementation Singleton {
CLLocation *location;
CLLocationManager *locationManager;
NSMutableData *responseData;
}
- (id)init {
if (self = [super init]) {
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setDouble:location.coordinate.latitude forKey:#"latitude"];
[userDefaults setDouble:location.coordinate.longitude forKey:#"longitude"];
[userDefaults synchronize];
}
return self;
}
- (void) timerDidFire:(NSTimer *)timer
{
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
if (([userDefaults doubleForKey:#"latitude"] != location.coordinate.latitude) || ([userDefaults doubleForKey:#"longtitude"] != location.coordinate.longitude)) {
NSMutableURLRequest *request = [NSMutableURLRequest
requestWithURL:[NSURL URLWithString:#"http://setslocation.php"]];
NSDictionary *requestData = [[NSDictionary alloc] initWithObjectsAndKeys:
[NSString stringWithFormat:#"%f", location.coordinate.longitude], #"longitude",
[NSString stringWithFormat:#"%f", location.coordinate.latitude], #"latitude",
nil];
NSError *error;
NSData *postData = [NSJSONSerialization dataWithJSONObject:requestData options:0 error:&error];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:postData];
[NSURLConnection connectionWithRequest:request delegate:self];
[userDefaults setDouble:location.coordinate.latitude forKey:#"latitude"];
[userDefaults setDouble:location.coordinate.longitude forKey:#"longtitude"];
[userDefaults synchronize];
}
}

Answer 1

first save your textfield value to NSUserDefaults and synchronize. You can get your value any where in your project from NSUserDefaults.
set value like:
[[NSUserDefaults standardUserDefaults] setObject:#"your textfield value" forKey:#"your key name"];
[[NSUserDefaults standardUserDefaults] synchronize];
get value:
NSLog(#"%#",[[NSUserDefaults standardUserDefaults] objectForKey:#"your key name"]);
make sure you write same key name.