Sending JSON data to a targeted object in iOS

Question

Sending JSON data to a targeted object in iOS

After reading numerous posts on Stack about POSTing data in XML and JSON, I am still having trouble finding specific information on how to update a selected object.

I am successfully retrieving data from my boss' job tracking API and everything seems to be working correctly. However, I now want to update certain variables of individual selected objects.

Imagine this scenario:

Suppose I have a recipe site API where I fetch 100 recipes and display their titles in a table. Upon selecting a row, a new screen appears showing all the recipe details with textfields for updating content and a save button. How can I update an ingredient for the chosen recipe so it reflects on the website?

It's important to note that I am utilizing my company's API and not a server-based database like Parse.com.

Although I prefer using JSON, I am open to exploring XML if there are better solutions available.

New Idea

Do I need to replace the entire object when making updates?

Additional Information

Since I don't have direct links to specific objects due to the API usage, I receive a block of data (100 recipes), convert each object into NSObject, sort them accordingly, and then display the selected object's contents when clicking on a row. This context might be useful in understanding my issue.

The reason for providing this extra context is:

When attempting to update the object via the API, how do I ensure I am only modifying that particular object and not the entire list?

ios objective-c xml json post

Answer 1

Answer №1

It appears that you are looking to send data via a POST request to populate existing fields:

To achieve this, you can use the following code snippet:

 NSString  *post = [NSString stringWithFormat:@"text_field1=%@",text_field.text];
    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowingLossyConversion:YES];
    NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)[postData length]];
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
    [request setURL:[NSURL URLWithString:[NSString stringWithFormat:"http://your api to recieve the data into the fields"]]];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:postData];
    NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];

    if(conn) {
        NSLog(@"Connection Successful");

    } else {
        NSLog(@"Connection could not be established");
    }
    }

Answer 2

It appears that you are looking to send data via a POST request to populate existing fields:

To achieve this, you can use the following code snippet:

 NSString  *post = [NSString stringWithFormat:@"text_field1=%@",text_field.text];
    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowingLossyConversion:YES];
    NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)[postData length]];
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
    [request setURL:[NSURL URLWithString:[NSString stringWithFormat:"http://your api to recieve the data into the fields"]]];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:postData];
    NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];

    if(conn) {
        NSLog(@"Connection Successful");

    } else {
        NSLog(@"Connection could not be established");
    }
    }

Answer 3

Answer №2

One possible solution is utilizing Mantle on GitHub. https://github.com/Mantle/Mantle

Answer 4

One possible solution is utilizing Mantle on GitHub. https://github.com/Mantle/Mantle

Sending JSON data to a targeted object in iOS

Answer №1

Answer №2

Similar questions

JavaScript seems to have difficulty correctly parsing objects from JSON

Retrieve the most recent row from a PHP JSON response

What is the purpose of the jQuery json.text method?

Using Alamofire and SwiftyJSON subscripts in Swift 3

Reducing the size of XML files in ASP.NET 3.5 returned from WebMethods: Available solutions

Sending an AJAX request to a REST service in order to submit the information captured in an HTML form

Include JSON elements in the ajaxSubmit function

Discovering the data types of various dictionary values within a JSON file can become a bit tricky when dealing with null values

What is the reason behind appengine-rest-server returning JSON strings instead of integers for properties?

Using JSON WebAPI to consume AAD Authentication for Power BI integration

Using jQuery to interact with a web service - overcoming cross-domain restrictions

How can I set up mixare with JSON data?

Sending user input from search component to main App.js in React

Analyze items in two arrays using JavaScript and add any items that are missing

Utilizing an Angular foreach loop for restructuring JSON data

Is it possible to install a Chrome extension specifically for YouTube on Google Chrome?

Extracting data from JSON column using a variable element name

Obtain the state name after selecting it from the drop-down menu and clicking the submit button (part 3)

When comparing org.json.simple.JSONObject and org.json.JSONObject, the issue of JSONException not being able to be resolved as a

Switching between languages dynamically with Angular JS using $translateProvider and JSON files