Show JSON content depending on user id iOS - mysql

Question

I want to show the content depending on user id.
The user log-in to the App, after the successful login, he will see the content depending on his id that is retrieved from the JSON file which is connected the the external mysql database.
- (void)viewDidLoad
{
[super viewDidLoad];
NSURL *jsonURL = [NSURL URLWithString:#"http://api.example.com/page.php?user_id=1"];
NSData *jsonData = [NSData dataWithContentsOfURL:jsonURL];
NSError *error = nil;
NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
NSLog(#"%#",dataDictionary);
self.something = [dataDictionary objectForKey:#"something"];
}
My problem is :
How to make " 1 " in ( user_id=1 ) dynamic, in a way, it will be changed automatically when the user log-in to his account.

Answer 1

Prepare URL dynamically
NSString *userID = #"23";//Get your userID after login
NSURL *jsonURL = [NSURL URLWithString:[NSString stringWithFormat:#"http://api.example.com/page.php?user_id=%#",userID];

Answer 2

you can use StringWithFormat Method of NSString Class, This methods helps you in creating dynamic NSString Objects,
- (void)viewDidLoad
{
[super viewDidLoad];
NSString userId = #"your user id here";
NSURL *jsonURL = [NSURL URLWithString:[NSString StringWithFormat:#"http://api.example.com/page.php?user_id=%#",userId]];
NSData *jsonData = [NSData dataWithContentsOfURL:jsonURL];
NSError *error = nil;
NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
NSLog(#"%#",dataDictionary);
self.something = [dataDictionary objectForKey:#"something"];
}