in my app i am using a UITextView to display Text content on my view. I have an API for the text content to be display on UITextView.
but now i am confused how to display the API content on UITextView. Someone
please provide me the complete code to implement.
API URL: http://any_url
i am sharing the details of the API
Try this code:-
FOR GET REQUEST
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithURL:[NSURL URLWithString:#"https://itunes.apple.com/search?term=apple&media=software"] completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(#"Error: %#",error);
} else {
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(#"%#", json);
}
}];
FOR POST REQUEST
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:#"YOUR_API"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request addValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request addValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setHTTPMethod:#"POST"];
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: #"TEST IOS", #"name",
#"IOS TYPE", #"typemap",
nil];
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request setHTTPBody:postData];
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(#"Error: %#",error);
} else {
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(#"%#", json);
}
}];
[postDataTask resume];
In the mapData dictionary there will be your parameters if any.
And if not Eliminate this code
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: #"TEST IOS", #"name",
#"IOS TYPE", #"typemap",
nil];
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request setHTTPBody:postData];
And then assigned the json to the text property of UITextView's object.
Your data won't magically appear in your UITextView. You will have to do a network request with NSURLSession and parse the data, then you can implement the UITextView its properties and add the data.
Related
NSError *error;
NSDictionary *dicData = [[NSDictionary alloc]initWithObjectsAndKeys:username,#"username",password,#"password",cpassword,#"cpassword",mobile,#"mobile",firstname,#"firstname",lastname,#"lastname",#"register",#"action",nil];
NSLog(#"parameter=%#",dicData);
NSURLComponents *components = [NSURLComponents componentsWithString:#"http://followerlikes.com/app_appoint/json/?action=register"];
NSMutableArray *queryItems = [NSMutableArray array];
for (NSString *key in dicData) {
[queryItems addObject:[NSURLQueryItem queryItemWithName:key value:dicData[key]]];
}
components.queryItems = queryItems;
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:components.URL];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
NSData *postData = [NSJSONSerialization dataWithJSONObject:dicData options:0 error:&error];
[request setHTTPBody:postData];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(#"%#",data);
NSLog(#"%#",response);
NSLog(#"%#",error);
NSString *strRes = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"%#",strRes);
NSError *resultError;
NSDictionary *dicResult = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&resultError];
dispatch_async(dispatch_get_main_queue(), ^
{
if (error !=nil) {
NSLog(#"%#",error.description);
NSLog(#"%#",error.localizedDescription);
}
else {
completion(dicResult);
}
});
}];
[task resume];
}
In order send request for getting data, you have to add key in info.plist as follow :
And just update your code as below :
NSError *error;
NSDictionary *dicData = [[NSDictionary alloc] initWithObjectsAndKeys:#"user123", #"username", #"pass1234", #"password", #"pass1234", #"cpassword", #"0123456789", #"mobile", #"User", #"firstname", #"Name", #"lastname", #"register", #"action", nil];
NSLog(#"parameter=%#",dicData);
// NSURLComponents *components = [NSURLComponents componentsWithString:#"http://followerlikes.com/app_appoint/json/?action=register"];
//
// NSMutableArray *queryItems = [NSMutableArray array];
// for (NSString *key in dicData) {
// [queryItems addObject:[NSURLQueryItem queryItemWithName:key value:dicData[key]]];
// }
// components.queryItems = queryItems;
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"http://followerlikes.com/app_appoint/json/?action=register"]];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
NSData *postData = [NSJSONSerialization dataWithJSONObject:dicData options:0 error:&error];
[request setHTTPBody:postData];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(#"Data : %#",data);
NSLog(#"RESPONSE : %#",response);
NSLog(#"ERROR : %#",error);
NSString *strRes = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"%#",strRes);
NSError *resultError;
NSDictionary *dicResult = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&resultError];
NSLog(#"RESPONSE DICT : %#", dicResult);
dispatch_async(dispatch_get_main_queue(), ^ {
if (error !=nil) {
NSLog(#"ERROR : %#",error.description);
NSLog(#"ERROR : %#",error.localizedDescription);
}
else {
// completion(dicResult);
}
});
}];
[task resume];
I'm trying to post new data to a ws but im geting error each time
I need to
1-pass a username and password each time
2-code the data with AES256 WITH THE API KEY
Code:
- (IBAction)AddTicket:(id)sender {
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
NSURL *URL = [[NSURL alloc] initWithString:#"http://dev.enano-tech.com/api/Ticket"];
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:#"1",#"id",#"1",#"idProject",#"1",#"idTicketType",#"nameo",#"name",#"nameo",#"description", #"1",#"idStatus",#"2016-06-23 15:20:49",#"creationDateTime", nil];
NSData *dataToPost = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:nil];
NSData *final =[dataToPost AES256EncryptWithKey:#"02b6e206868660a0d59d2e51a11fdcd6"];
//
NSLog(#"postData1e == %#",final);
NSLog(#"final %#",dataToPost);
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPMethod:#"POST"];
[request addValue:#"CURLAUTH_BASIC" forHTTPHeaderField:#"CURLOPT_HTTPAUTH"];
[request addValue:#"Basic YWRtaW46YWRtaW5hZG1pbg==" forHTTPHeaderField:#"authorization"];
[request addValue:#"admin:adminadmin" forHTTPHeaderField:#"CURLOPT_USERPWD"];
[request addValue:#"true" forHTTPHeaderField:#"CURLOPT_RETURNTRANSFER"];
[request addValue:#"false" forHTTPHeaderField:#"CURLOPT_SSL_VERIFYPEER"];
[request addValue:#"POST" forHTTPHeaderField:#"CURLOPT_CUSTOMREQUES"];
[request addValue:#"true" forHTTPHeaderField:#"CURLOPT_POST"];
[request addValue:#"false" forHTTPHeaderField:#"CURLOPT_POSTFIELDS"];
[request setHTTPBody:final];
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSString *result = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSString *str = [[NSString alloc]initWithData:final encoding:NSUTF8StringEncoding];
NSLog(#"data %#",data);
NSLog(#"respoce %#",response);
NSLog(#"result == %#",result);
}];
[postDataTask resume];
}
Response:
2016-08-02 15:06:47.768 Projector[3936:1619429] result == {"error":"invalid API query", "message":"'data' is not correctly encoded for method POST. Request for correct API KEY"}
this is the documentation of api:
enter image description here
Your webserver is missing "data" from the website. To fix it, you'll need to add that field to your form or find the correct field name (case sensitive)
This is my code by which i am posting data in url.
- (IBAction)Register:(id)sender {
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:#"http://dev1.brainpulse.org/quickmanhelp/webservice/api.php?act=registration"]];
[request setHTTPMethod:#"POST"];
NSLog(#"the company name is:%#",_CompanyName.text);
NSLog(#"the email is:%#",_Email.text);
NSLog(#"the password is:%#",_Password.text);
NSLog(#"the password again is:%#",_Passwordagin.text);
NSString *strParameters =[NSString stringWithFormat:#"email_id=%#&company_name=%#&password=%#",_Email.text,_CompanyName.text,_Password.text, nil];
NSLog(#"the data Details is =%#", strParameters);
NSData *data1 = [strParameters dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:data1];
// NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
//Handle your response here
//}];
NSError *err;
NSURLResponse *response;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];
NSString *resSrt = [[NSString alloc]initWithData:responseData encoding:NSASCIIStringEncoding];
NSLog(#"got response==%#", resSrt);
if(resSrt)
{
NSLog(#"got response");
}
else
{
NSLog(#"faield to connect");
}
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:#"[http://dev1.brainpulse.org/quickmanhelp/webservice/api.php?act=registration"];
NSMutableURLRequest *request1 = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request1 addValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request1 addValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request1 setHTTPMethod:#"POST"];
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: #"company_name", _CompanyName.text,
#"email_id", _Email.text,#"password", _Password.text,
nil];
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request setHTTPBody:postData];
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
//Handle your response here
}];
[postDataTask resume];
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:#"[http://dev1.brainpulse.org/quickmanhelp/webservice/api.php?act=registration"];
NSMutableURLRequest *request1 = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request1 addValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request1 addValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request1 setHTTPMethod:#"POST"];
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: #"company_name", _CompanyName.text,
#"email_id", _Email.text,#"password", _Password.text,
nil];
NSURLResponse *response = nil;
NSError *error = nil;
NSData *bodyData = [NSJSONSerialization dataWithJSONObject:mapData options:NSJSONWritingPrettyPrinted error:&error];
[request setHTTPBody:bodyData];
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *strResponce = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSMutableDictionary *dictResponse = [NSJSONSerialization JSONObjectWithData:[strResponce dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableLeaves error:&error];
NSLog(#"Result: %#",dictResponse);
Try the code in this gist I created
Which is generated using PAW .
I'm using this piece of code for hit data in url.
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:#"http://dev1.brainpulse.org/quickmanhelp/webservice/api.php?act=registration"];
NSMutableURLRequest *request1 = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request1 addValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request1 addValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request1 setHTTPMethod:#"POST"];
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: #"company_name", _CompanyName.text,
#"email_id", _Email.text,#"password", _Password.text,nil];
NSLog(#"Result: %#",request1);
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request1 setHTTPBody:postData];
NSURLResponse *response = nil;
// NSError *error = nil;
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request1 completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
//Handle your response here
NSLog(#"Result: %#",mapData);
NSLog(#"Result: %#",request1);
NSLog(#"Result: %#",data);
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
NSLog(#"Result: %#",dictionary);
NSLog(#"Result error : %#",error.description);
}];
[postDataTask resume];
value of uitextfield is not store in url when i clicked on button, what should i do here?
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:#"http://dev1.brainpulse.org/quickmanhelp/webservice/api.php?act=registration"];
NSMutableURLRequest *request1 = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request1 addValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request1 addValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request1 setHTTPMethod:#"POST"];
//NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: _CompanyName.text,#"company_name",
//_Email.text,#"email_id", _Password.text,#"password",nil];
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: #"yyyyy",#"company_name",
#"karthik.saral#gmail.com",#"email_id", #"XXXXX",#"password",nil];
NSLog(#"Result: %#",request1);
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request1 setHTTPBody:postData];
NSURLResponse *response = nil;
// NSError *error = nil;
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request1 completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
//Handle your response here
NSLog(#"Result: %#",mapData);
NSLog(#"Result: %#",request1);
NSLog(#"Result: %#",data);
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
NSLog(#"Result: %#",dictionary);
NSLog(#"Result error : %#",error.description);
NSLog(#"answewrv : %#",dictionary);
NSLog(#"Result error : %#",error.description);
}];
[postDataTask resume];
this is updated code after the amendments. i am getting the same error.
You are wrong here:
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: #"company_name", _CompanyName.text,
#"email_id", _Email.text,#"password", _Password.text,nil];
It should be
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: _CompanyName.text,#"company_name",
_Email.text,#"email_id", _Password.text,#"password",nil];
initWithObjectsAndKeys mean: object,key, object, key
I have done also this type work you can see this , may be it will help you.
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:#" your URL "];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request addValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request addValue:#"*/*" forHTTPHeaderField:#"Accept"];
[request setHTTPMethod:#"POST"];
NSString *mapData = [NSString stringWithFormat:#"username=%#&password=%#&api_key=Your key", usernameField.text,passwordField.text];
NSData *postData = [mapData dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
[request setHTTPBody:postData];
NSLog(#"%#", mapData);
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if(error == nil)
{
NSString * text = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
NSLog(#"Data = %#",text);
NSError *error = nil;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if(error!=nil)
{
NSLog(#"error = %#",error);
}
dispatch_async(dispatch_get_main_queue(), ^{
[self checkUserSuccessfulLogin:json];
});
}
else{
NSLog(#"Error : %#",error.description);
}
}];
[postDataTask resume];
}
- (void)checkUserSuccessfulLogin:(id)json
{
// NSError *error;
NSDictionary *dictionary = (NSDictionary *)json;
if ([[dictionary allKeys] containsObject:#"login"])
{
if ([[dictionary objectForKey:#"login"] boolValue])
{
[self saveLoginFileToDocDir:dictionary];
ItemManagement *i = [[ItemManagement alloc]init];
[self presentViewController:i animated:YES completion:Nil];
}
else
{
NSLog(#"Unsuccessful, Try again.");
UIAlertView *alertLogin = [[UIAlertView alloc]initWithTitle:#"Error" message:#"Wrong Username Or Password" delegate:self cancelButtonTitle:#"cancel" otherButtonTitles:nil];
[alertLogin show];
}
}
}
- (void)saveLoginFileToDocDir:(NSDictionary *)dictionary
{
NSArray *pListpaths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *pListdocumentsDirectory = [pListpaths objectAtIndex:0];
NSString *path = [pListdocumentsDirectory stringByAppendingPathComponent:#"Login.plist"];
BOOL flag = [dictionary writeToFile:path atomically:true];
if (flag)
{
NSLog(#"Saved");
}
else
{
NSLog(#"Not Saved");
}
}
I'm attempting to communicate with a backend using NSURLSession, however, the backend wasn't set up to properly read NSData, so it views the NSData login details I send over as false, I wanna know if its possible to get NSURLSession to send raw strings rather than NSData objects. I've looked in books and the webs and I've been stumped for weeks.
Redoing the backend is not an option, the engineer in charge of that left. Any help is welcome.
Thanks. Here's what I've done so far, in case anyone needs to see some code.
NSError *error;
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration ];
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:self delegateQueue:nil];
NSString *rawUrlString = #"backend_url";
NSURL *url = [NSURL URLWithString:rawUrlString];
NSLog(#"%#", url);
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:
login data here
nil];
//NSLog(#"%#", parameters);
NSData *rawJson = [NSJSONSerialization dataWithJSONObject:parameters options:NSJSONWritingPrettyPrinted error:&error];
NSString *myString = [[NSString alloc] initWithData:rawJson encoding:NSUTF8StringEncoding];
NSData *finalData = [myString dataUsingEncoding:NSUTF8StringEncoding];
NSMutableData *body = [NSMutableData data];
[body appendData:finalData];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:body];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setValue:#"application/json" forHTTPHeaderField:#"charset"];
[request setValue:#"XMLHttpRequest" forHTTPHeaderField:#"X-Requested-With"];
NSURLSessionDataTask *postTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
{
NSLog(#"%#", [NSJSONSerialization JSONObjectWithData:data options:0 error:nil]);
}];
[postTask resume];
`
UPDATE: I've cleaned up the unnecessary bits this is the final code (still doesn't work though)
NSError *error;
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration ];
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:self delegateQueue:nil];
NSString *rawUrlString = #"backend_url";
NSURL *url = [NSURL URLWithString:rawUrlString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:login details nil];
NSData *rawJson = [NSJSONSerialization dataWithJSONObject:parameters options:NSJSONWritingPrettyPrinted error:&error];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:rawJson];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
NSURLSessionDataTask *postTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
{
NSLog(#"%#", [NSJSONSerialization JSONObjectWithData:data options:0 error:nil]);
}];
[postTask resume];
Your backend is setup to handle NSData. It's impossible to send a string over an internet connection, you can only send NSData and all servers expect it.
This code here is wrong:
NSData *rawJson = [NSJSONSerialization dataWithJSONObject:parameters options:NSJSONWritingPrettyPrinted error:&error];
NSString *myString = [[NSString alloc] initWithData:rawJson encoding:NSUTF8StringEncoding];
NSData *finalData = [myString dataUsingEncoding:NSUTF8StringEncoding];
Instead just do this:
NSData *finalData = [NSJSONSerialization dataWithJSONObject:parameters options:NSJSONWritingPrettyPrinted error:&error];
The NSData object will contain a string in the correct format for the server to also recognise as a string. Note it will be in UTF-8 encoding, perhaps on some servers you will want to change that to something else.