sample objective c code

//

//  ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize userInput;

@synthesize userParams;

@synthesize userOutput;

@synthesize username;

@synthesize password;

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (IBAction)Submit:(id)sender {

    ResponseViewer.text =  [self makeRequest];

}

- (NSString*) getAccessToken {

    NSString *urlString = @"https://test.openapi.starbucks.com/v1/oauth/token";

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

    [request setURL:[NSURL URLWithString:urlString]];

    [request setHTTPMethod:@"POST"];

    

    NSMutableData *body = [NSMutableData data];

    NSString *requestBody = [NSString stringWithFormat:@"grant_type=password&username=%@&password=%@client_id=my_client_id&client_secret=my_client_secret&scope=test_scope&api_key=my_api_key", username.text, password.text];

    [body appendData:[[NSString stringWithFormat:@"%@\r\n", requestBody] dataUsingEncoding:NSUTF8StringEncoding]];

    

    // set request body

    [request setHTTPBody:body];

    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];

    

    //return and test

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    

    NSLog(@"%@", returnString);

    

    NSData *JSONData = [returnString dataUsingEncoding:NSUTF8StringEncoding];

    

    userOutput.text = returnString;

    

    NSDictionary* json = [NSJSONSerialization JSONObjectWithData:JSONData options:kNilOptions error:nil];

    

    return [json objectForKey:@"access_token"];

    

}

- (NSString*) makeRequest {

    NSString *urlString = [NSString stringWithFormat:@"https://test.openapi.starbucks.com/%@", userInput.text];

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

    [request setURL:[NSURL URLWithString:urlString]];

    [request setHTTPMethod:[NSString stringWithFormat:@"%@", _method.accessibilityValue]];

    

    if ([_outputType.accessibilityValue compare:@"Json" options:NSCaseInsensitiveSearch] == TRUE)[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];

    

    if ([_outputType.accessibilityValue compare:@"XML" options:NSCaseInsensitiveSearch] == TRUE)[request setValue:@"application/xml" forHTTPHeaderField:@"Accept"];

    

    

    if ([_method.accessibilityValue compare:@"POST" options:NSCaseInsensitiveSearch] == TRUE)

    {

        NSMutableData *body = [NSMutableData data];

        NSString *requestBody = userParams.text;

    

        [body appendData:[[NSString stringWithFormat:@"%@\r\n", requestBody] dataUsingEncoding:NSUTF8StringEncoding]];

    

        // set request body

        [request setHTTPBody:body];

    }

    

    //return and test

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    

    NSLog(@"%@", returnString);

    userOutput.text = returnString;

    return returnString;

    

}

    

@end