Question

I am getting connecting with restful web services, on login i get this session id.

"session":"86da8a2cb82ff46595bf2d8a57875e03"

After login once, this session id would be used to get the data from web services for other views of the application.

How can i make it global so that if there is change in session value global variable’s value also gets changed

Answer 1

If you want the session id to only last while the application is open you can use a global variable. If you want your session id to last longer you can store it in the user defaults.

example:

// global variable
static NSString * sessionIDStore = nil;

+ (NSString*)sessionID {
    return sessionIDStore;
}

+ (void)setSessionID:(NSString*)newSessionID {
    [newSessionID retain];
    [sessionIDStore release];
    sessionIDStore = newSessionID;
}

// user defaults
+ (NSString*)sessionID {
    return [[NSUserDefaults standardUserDefaults] objectForKey:@"myapp.sessionID"];
}

+ (void)setSessionID:(NSString*)newSessionID {
    [[NSUserDefaults standardUserDefaults] setObject:newSessionID forKey:@"myapp.sessionID"];
}

if you use NSUserDefaults remember to call [[NSUserDefaults standardUserDefaults] synchronize]; when your app is about to exit.