I am new to iOS i need to show particular object for key in textview or picker view using post method response.
coding:
NSString *parameter = [NSString stringWithFormat:#"username=%#",user];
NSData *parameterData = [parameter dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
url = [NSURL URLWithString: URL];
NSLog(#"%#", parameterData);
request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPBody:parameterData];
NSString *content = [NSString stringWithUTF8String:[parameterData bytes]];
}
[request setHTTPMethod:method];
[request addValue: #"application/x-www-form-urlencoded; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
if( connection )
{
mutableData = [NSMutableData new];
}
}
delegate method:
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *responseStringWithEncoded = [[NSString alloc] initWithData: mutableData encoding:NSUTF8StringEncoding];
// NSLog(#"Response from Server : %#", responseStringWithEncoded);
NSError* error;
NSDictionary* json = [NSJSONSerialization JSONObjectWithData: mutableData
options:kNilOptions
error:&error]; //Now we got top level dictionary
// (2)
arrdata =[json objectForKey:#"Branches"];
//(2)
NSLog(#"%#",[arrdata valueForKey:#"id"]);
NSAttributedString * attrStr = [[NSAttributedString alloc] initWithData:[responseStringWithEncoded dataUsingEncoding:NSUnicodeStringEncoding] options:#{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
serverResponse.attributedText = attrStr;
//serverResponse.text = arrdata;
}
I am successfully showed in NSLOG as below :
But in textview it is not updating. How can I fix this?
serverResponse.text = [arrdata valueForKey:#"id"];
Try out the below code:
dispatch_async(dispatch_get_main_queue(),^ {
//Update your UI Component here
serverResponse.attributedText = attrStr;
//or uncomment below line and comment upper line
//serverResponse.text = [arrdata valueForKey:#"id"];
});
All the UI changes must be carried out in Main thread.
Hence probably this may be the issue.
so, at the end of connectionDidFinishLoading wrap textview with GCD main queue like below :
dispatch_async(dispatch_get_main_queue(),^ {
//Update text view
serverResponse.attributedText = attrStr;
});
I use the following code to create a dictionary based on a JSON string received from the server. (I have downloaded JSONKit and embedded it into the project). The code below returns a legal JSON string from the server (parsed well on Android) but crashes when I try to convert it to a dictionary.
- (IBAction)submit
{
bool useSSL = true;
char *c_url="http://(rest of URL)";
NSString* url = [NSString stringWithFormat:#"%s" , c_url];
url = [NSString stringWithFormat:#"%#%#%s", url, self.label.text, "/keys"];
NSString * response = [self getDataFrom:url];
NSDictionary *dict = [response objectFromJSONString]; //generates SIGABRT!!
NSLog(#"%#",dict);
NSString *success = [dict valueForKey:#"success"];
}
- (NSString *) getDataFrom:(NSString *)url{
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setHTTPMethod:#"GET"];
[request setURL:[NSURL URLWithString:url]];
NSError *error = [[NSError alloc] init];
NSHTTPURLResponse *responseCode = nil;
NSData *oResponseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&responseCode error:&error];
if([responseCode statusCode] != 200){
NSLog(#"Error getting %#, HTTP status code %i", url, [responseCode statusCode]);
return nil;
}
return [[NSString alloc] initWithData:oResponseData encoding:NSUTF8StringEncoding];
}
THANKS,
Simon
Found an answer here.
Answer says: "Figured it out... I had JSONKIt.h included in the project but for some weird reason, JSONKit.m was not included in the 'Compile Sources' under 'Build Phases' - once I added it manually it started working fine."
My App_Code/IGetEmployees.vb file
<ServiceContract()> _
Public Interface IGetEmployees
<OperationContract()> _
<WebInvoke(Method:="POST", ResponseFormat:=WebMessageFormat.Json, BodyStyle:=WebMessageBodyStyle.Wrapped, UriTemplate:="json/contactoptions")> _
Function GetAllContactsMethod(strCustomerID As String) As List(Of NContactNames)
End Interface
My App_Code/GetEmployees.vb file
<WebMethod()> _
<ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _
Public Function GetAllContactsMethod(strCustomerID As String) As List(Of NContactNames) Implements IGetEmployees.GetAllContactsMethod
Utilities.log("Hit get all contacts at 56")
Dim intCustomerID As Integer = Convert.ToInt32(strCustomerID)
Dim lstContactNames As New List(Of NContactNames)
'I add some contacts to the list.
Utilities.log("returning the lst count of " & lstContactNames.Count)
Return lstContactNames
End Function
NContactNames is a class with 3 properties.
So i am using ASP.NET web services to retrieve information from SQL server and pass it to my iPad in JSON format. I have a problem with parameter passing. So like you see i have 2 files IGetEmployees.vb and GetEmployees.vb. I am implementing the method GetAllContactsMethod. What's happening is the two lines in GetEmployees.vb file (Utilities.log), they never get logged. The function is not getting called at all.
My objective c code to call this function
NSString *param = [NSString stringWithFormat:#"strCustomerID=%#",strCustomerID];
jUrlString = [NSString stringWithFormat:#"%#",#"http://xyz-dev.com/GetEmployees.svc/json/contactoptions"];
jurl = [NSURL URLWithString:jUrlString];
NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:jurl];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:[param dataUsingEncoding:NSUTF8StringEncoding]];
NSLog(#" request string is %#",[[request URL] absoluteString]);
NSLog(#"Done");
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
if(theConnection)
{
jData = [NSMutableData data];
NSError *jError;
NSMutableDictionary *json =[NSJSONSerialization JSONObjectWithData:jData options:kNilOptions error:&jError];
NSLog(#"%#",json); //Gets Here and prints (null)
NSLog(#"Done"); //prints this as well.
}
else
{
NSLog(#"No");
}
At the time of posting this code the "if" statement is true and (null) is printed followed by "Done"
The output of my absolute request is:
request string is http://xyz-dev.com/GetEmployees.svc/json/contactoptions
This is the first time i am writing json to accept parameters. So i might be missing something.What is it?Why is the function not getting called at all on the Visual Studio side. If you need more info please ask.Thanks...
this is the moethod in Objetive-C, for that.
-(void) insertEmployeeMethod
{
if(firstname.text.length && lastname.text.length && salary.text.length)
{
NSString *str = [BaseWcfUrl stringByAppendingFormat:#"InsertEmployee/%#/%#/%#",firstname.text,lastname.text,salary.text];
NSURL *WcfSeviceURL = [NSURL URLWithString:str];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:WcfSeviceURL];
[request setHTTPMethod:#"POST"];
// connect to the web
NSData *respData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
// NSString *respStr = [[NSString alloc] initWithData:respData encoding:NSUTF8StringEncoding];
NSError *error;
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData:respData
options:NSJSONReadingMutableContainers
error:&error];
NSNumber *isSuccessNumber = (NSNumber*)[json objectForKey:#"InsertEmployeeMethodResult"];
//create some label field to display status
status.text = (isSuccessNumber && [isSuccessNumber boolValue] == YES) ? [NSString stringWithFormat:#"Inserted %#, %#",firstname.text,lastname.text]:[NSString stringWithFormat:#"Failed to insert %#, %#",firstname.text,lastname.text];
}
}
Before to run the code, test your URL with POSTMAN, is an app from Google Chrome.
regards.
am starting to build login form reading from external server via http request i need to parse json result to get user name
- (IBAction)getlogin:(UIButton *)sender {
NSString *rawStrusername = [NSString stringWithFormat:#"username=%#",_username.text];
NSString *rawStrpassword = [NSString stringWithFormat:#"password=%#",_password.text];
NSString *post = [NSString stringWithFormat:#"%#&%#", rawStrusername, rawStrpassword];
// NSString *post = #"rawStrusername&rawStrpassword";
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
/* NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]]; */
NSURL *url = [NSURL URLWithString:#"http://www.othaimmarkets.com/my_services_path/user/login.json"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"POST"];
/* [request setValue:postLength forHTTPHeaderField:#"Content-Length"]; */
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSURLResponse *response;
NSError *err;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];
NSLog(#"responseData: %#", [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]);
//NSLog(#"responseData: %#", responseData);
}
I get this result:
{"sessid":"g2ev7til6d750ducrkege0cbj2","session_name":"SESS02795057fe9e6b2fc0777bf4057b248f","user":{"uid":"617","name":"mohammed.abdelrasoul#gmail.com","mail":"mohammed.abdelrasoul#gmail.com","mode":"0","sort":"0","threshold":"0","theme":"","signature":"","signature_format":"0","created":"1316602317","access":"1352643854","login":"1352666338","status":"1","timezone":"10800","language":"ar","picture":"","init":"mohammed.abdelrasoul#gmail.com","data":"a:5:{s:18:\"country_iso_code_2\";s:2:\"SA\";s:13:\"timezone_name\";s:11:\"Asia/Riyadh\";s:5:\"block\";a:1:{s:7:\"webform\";a:1:{s:15:\"client-block-88\";i:1;}}s:13:\"form_build_id\";s:37:\"form-3ae73833f08accc7abe5517347ea87eb\";s:7:\"contact\";i:0;}","country_iso_code_2":"SA","timezone_name":"Asia/Riyadh","block":{"webform":{"client-block-88":1}},"form_build_id":"form-3ae73833f08accc7abe5517347ea87eb","contact":0,"roles":{"2":"authenticated user"}}}
Or, formatted for the sake of legibility:
{
"sessid":"g2ev7til6d750ducrkege0cbj2",
"session_name":"SESS02795057fe9e6b2fc0777bf4057b248f",
"user":{
"uid":"617",
"name":"mohammed.abdelrasoul#gmail.com",
"mail":"mohammed.abdelrasoul#gmail.com",
"mode":"0",
"sort":"0",
"threshold":"0",
"theme":"",
"signature":"",
"signature_format":"0",
"created":"1316602317",
"access":"1352643854",
"login":"1352666338",
"status":"1",
"timezone":"10800",
"language":"ar",
"picture":"",
"init":"mohammed.abdelrasoul#gmail.com",
"data":"a:5:{s:18:\"country_iso_code_2\";s:2:\"SA\";s:13:\"timezone_name\";s:11:\"Asia/Riyadh\";s:5:\"block\";a:1:{s:7:\"webform\";a:1:{s:15:\"client-block-88\";i:1;}}s:13:\"form_build_id\";s:37:\"form-3ae73833f08accc7abe5517347ea87eb\";s:7:\"contact\";i:0;}",
"country_iso_code_2":"SA",
"timezone_name":"Asia/Riyadh",
"block":{
"webform":{
"client-block-88":1
}
},
"form_build_id":"form-3ae73833f08accc7abe5517347ea87eb",
"contact":0,
"roles":{
"2":"authenticated user"
}
}
}
how i can get the objects data or parse the result to get user name
any help or examples will be appreciated
You need to use the NSJSONSerialization class method, JSONObjectWithData:options:error: to create an NSDictionary:
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:&error];
if (! error) {
NSLog(#"%#",jsonDict);
}else{
NSLog(#"%#",error.localizedDescription);
}
This will get you to the point where you can look at the dictionary, which will be easier to read. It looks like you need to use objectForKey:#"sessid" to get you to user, then objectForKey#"user", then objectForKey:#"name" to get you to the name.
Check out this framework for parsing json. https://github.com/stig/json-framework/
Also check out this answer iPhone/iOS JSON parsing tutorial. You'll find a link to a tutorial you can do to get acquainted with json parsing in ios.
See this answer and some code :
NSMutableData *data; // Contains data received from the URL connection declares in header
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)dataIn
{
// Do it this way because connection doesn't guarantee all the data is in
POLLog(#" Tide View connection");
[data appendData:dataIn];
}
- (void) connectionDidFinishLoading:(NSURLConnection *) conn
{
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *results = [jsonString JSONValue]; // This is a new category added to the NSString by SBJSON
//100 parameters
for (int n=0;n<=100;n++)
{
// Get all the returned results
params[n] = [[results objectForKey:[NSString stringWithFormat:#"param%d",n]] floatValue];
}
To expand upon rdelmar's answer (which I think you should accept), you can use NSJSONSerialization and then navigate the NSDictionary results to extract the userName:
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:responseData
options:0
error:&error];
if (error == nil) {
NSDictionary *userDictionary = [jsonDict objectForKey:#"user"];
NSString *userName = [userDictionary objectForKey:#"name"];
// do what you need with the userName
} else {
NSLog(#"%#",error.localizedDescription);
}
Or if using the latest version of Xcode, you can replace those objectForKey references with the even more concise Modern Objective-C syntax:
NSDictionary *userDictionary = jsonDict[#"user"];
NSString *userName = userDictionary[#"name"];
Suppose i have two classes A & B. class A calls the asynchronus method Foo in class B. Foo method fetches data using asynchronous ASIHTTPRequest and send the data from Foo back as the return value to Class A. Class A will use that returned data and do the things
I am creating a object of my class URLParser here in another class and calling the function getJsonUrl , it will parse and get the json url for me . I am using that returned URL in another ASIHTTPRequest here . But i am getting EXC_BAD_ACCESS ...help me to figure it out ....
......
URLParser *urlParser = [[URLParser alloc] init];
NSString *JsonString = [urlParser getJsonUrl:#"http://mywebs.com/?q=iphone/news"];
NSLog(#" url returned = %#" ,JsonString);
NSURL *JsonUrl = [NSURL URLWithString:JsonString];
newsRequest = [ASIHTTPRequest requestWithURL:JsonUrl];
[newsRequest setDelegate:self];
[newsRequest startAsynchronous];
}
- (void)requestFinished:(ASIHTTPRequest *)request
{
newsDictionary = [[NSMutableDictionary alloc] init];
NSData *responseData = [request responseData];
NSString *response = [[NSString alloc] initWithData:responseData encoding:NSASCIIStringEncoding] ;
self.newsDictionary = [response JSONValue];
[response release];
[self getDataNews:self.newsDictionary];
}
URL Parser Class
#synthesize albumDic;
#synthesize GlobalRequest;
-(NSString*)getJsonUrl:(NSString *)url{
GlobalRequest = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:url]];
[GlobalRequest setDelegate:self];
[GlobalRequest startAsynchronous]; // when i called the [GlobalRequest startSynchronous] ....both cases m getting the same error
return JsonStr;
}
- (void)requestFinished:(ASIHTTPRequest *)request{
albumDic = [[NSMutableDictionary alloc] init];
NSData *responseData = [request responseData];
NSString *response = [[NSString alloc] initWithData:responseData encoding:NSASCIIStringEncoding] ;
self.albumDic = [response JSONValue];
[response release];
[self GetDictionary:self.albumDic];
}
- (void)requestFailed:(ASIHTTPRequest *)request{
[request cancel];
}