IOS How to 'PUT' text from UIText, and using blocks - ios

Question

I am very new to IOS. With the help of another managed to 'get' data from a third-party API and display in my table view, but now l want to write a number of strings from UIText fields, format based on the API docs and write to the server. The existing code that l have uses blocks. Can anyone provide a very simple example?
Below serves as a rough stab in the dark at decomposing what would be required:
Class 1 - VC class:
//User input from UIText field
I am assuming that l need to write the strings to a NSDictionary- object and key pairs, and using a block?
Call a method which resides in Class 2, which will request the data from the block in Class 1?
Class 2 - Model class:
//Format the data as per the API dictates
//'PUT' the string to the server
Here is what l have thus far:
URLOUTViewController.h Class
//
// URLOUTViewController.h
// URLOUT
//
// Created by Gregory Arden on 21/11/2013.
// Copyright (c) 2013 Not Defined. All rights reserved.
//
#import <UIKit/UIKit.h>
#import "URLOUT_Model.h"
#interface URLOUTViewController : UIViewController
#property (strong, nonatomic) IBOutlet UITextField *firstName;
#property (strong, nonatomic) IBOutlet UITextField *secondName;
- (IBAction)submitButton:(id)sender;
#end
URLOUTViewController.m
//
// URLOUTViewController.m
// URLOUT
//
// Created by Gregory Arden on 21/11/2013.
// Copyright (c) 2013 Not Defined. All rights reserved.
//
#import "URLOUTViewController.h"
#import "URLOUT_Model.h"
#interface URLOUTViewController ()
//Private properties
#property (strong, nonatomic) URLOUT_Model *modelNewDroplet;
#property (strong, nonatomic) NSDictionary *userInput;
#end
#implementation URLOUTViewController
#synthesize userInput;
#synthesize firstName;
#synthesize secondName;
- (URLOUT_Model *) modelNewDroplet
{
if (!_modelNewDroplet) _modelNewDroplet = [[URLOUT_Model alloc]init];
return _modelNewDroplet;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[URLOUT_Model createDropletWithCompletion:^(NSDictionary *userInput) {
self.modelNewDroplet = userInput;
}];
// 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)submitButton:(id)sender {
NSDictionary *dic = [[NSDictionary alloc] initWithObjectsAndKeys:
self.firstName.text, #"firstName", self.secondName.text, #"secondname",nil];
NSLog(#"%#", [dic objectForKey:#"firstName, secondName"]);
}
#end
URLOUT_Model.h
//
// URLOUT_Model.h
// URLOUT
//
// Created by Gregory Arden on 21/11/2013.
// Copyright (c) 2013 Not Defined. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "URLOUTViewController.h"
typedef void (^NSDictionayBlock)(NSDictionary * params);
#interface URLOUT_Model : NSObject
+ (void)createDropletWithCompletion:(NSDictionary *) params;
#end
URLOUT_Model.m
//
// URLOUT_Model.m
// URLOUT
//
// Created by Gregory Arden on 21/11/2013.
// Copyright (c) 2013 Not Defined. All rights reserved.
//
#import "URLOUT_Model.h"
#implementation URLOUT_Model
+ (void)createDropletWithCompletion:(NSDictionary *) params;
{
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:#{params: firstName, secondName, nil}];
[urlRequest setHTTPMethod:#"PUT"];
[urlRequest setCachePolicy:NSURLCacheStorageNotAllowed];
[urlRequest setTimeoutInterval:30.0f];
[urlRequest addValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[NSURLConnection sendAsynchronousRequest:urlRequest
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *responseData, NSError *error){
NSError *serializationError = nil;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData
options:NSJSONReadingAllowFragments
error:&serializationError];
}];
}
#end

Answer 1

Creating a HTTP PUT request is simple:
Create an instance of NSMutableURLRequest.
Set the HTTP method to #"PUT" using the -setHTTPMethod: method.
Set the header fields and body using appropriate methods (-setValue:forHTTPHeaderField:, -setHTTPBody:, etc.)
Send the request using an instance of NSURLConnection.
Where the data that you send in the request comes from (text fields, data files, random number generator...) really doesn't make a difference in the creation of the request. You really shouldn't be storing data in your views, though. Generally speaking, your text views and such should trigger an action in a view controller when they change, and the view controller should update the data model. When you want to send data to some server, pull the data from the model, not from UI components.