AFNetworking GET and POST example

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@property (strong, nonatomic) UILabel *getResponseLabel;
@property (strong, nonatomic) UILabel *postResponseLabel;

@end

ViewController.m

#import "ViewController.h"
#import "AFHTTPClient.h"
#import "AFHTTPRequestOperation.h"

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    UIButton *getButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    getButton.frame = CGRectMake(20, 20, 280, 40);
    [getButton setTitle:@"perform GET request" forState:UIControlStateNormal];
    [getButton addTarget:self action:@selector(performGet:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:getButton];
    
    UIButton *postButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    postButton.frame = CGRectMake(20, 80, 280, 40);
    [postButton setTitle:@"perform POST request" forState:UIControlStateNormal];
    [postButton addTarget:self action:@selector(performPost:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:postButton];
    
    self.getResponseLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 130, 280, 40)];
    [self.view addSubview:self.getResponseLabel];

    self.postResponseLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 190, 280, 40)];
    [self.view addSubview:self.postResponseLabel];
}

- (void)performGet:(id)sender
{
    // create the baseURL
    NSURL *baseURL = [NSURL URLWithString:@"http://jonfriskics.com/"];
    
    // alloc init the AFHTTPClient for your baseURL
    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:baseURL];
    
    // setup the request to use the GET method for a specific API endpoint (I just made this one up) and don't send any
    // parameters, because for a GET request you would probably just have those in the URL if there were any
    NSURLRequest *request = [httpClient requestWithMethod:@"GET"
                                                     path:@"http://jonfriskics.com/afnetworking/get"
                                               parameters:nil];
    
    // setup the AFHTTPRequestOperation
    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

    // need to let the httpClient know that we're performing an AFHTTPRequestOperation
    [httpClient registerHTTPOperationClass:[AFHTTPRequestOperation class]];
    
    // since we want a JSON response back, we'll set this header
    [httpClient setDefaultHeader:@"Accept" value:@"application/json"];
    
    // perform the operation
    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

        // take the JSON response object and put it in an NSDictionary called JSON
        NSError *error;
        NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:responseObject
                                                             options:0
                                                               error:&error];

        // set the contents of the getResponseLabel to the JSON dictionary
        self.getResponseLabel.text = [NSString stringWithFormat:@"%@",JSON];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error: %@",error.localizedDescription);
    }];
    [operation start];
}

- (void)performPost:(id)sender
{
    NSURL *baseURL = [NSURL URLWithString:@"http://jonfriskics.com/"];
    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:baseURL];
    
    // everything is the same for POST, except the method is POST, the path is a different endpoint
    // and a dictionary of parameters is sent to the server
    // in this case, I'm sending an id parameter with a value of 3, but this really simple endpoint that
    // I've set up for this example accepts 1, 2, or 3.
    NSURLRequest *request = [httpClient requestWithMethod:@"POST"
                                                     path:@"http://jonfriskics.com/afnetworking/post/"
                                               parameters:@{@"id":@"3"}];
    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
    [httpClient registerHTTPOperationClass:[AFHTTPRequestOperation class]];
    [httpClient setDefaultHeader:@"Accept" value:@"application/json"];
    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSError *error;
        NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:responseObject
                                                             options:0
                                                               error:&error];
        
        self.postResponseLabel.text = [NSString stringWithFormat:@"%@",JSON];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error: %@",error.localizedDescription);
    }];
    [operation start];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

@end