I want to use the response object of AFHTTPRequestOperation outside of the success block. Here is my code below:
NSMutableArray *arr = [[NSMutableArray alloc] init];
NSURL *URL = [NSURL URLWithString:#"my_url"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
NSURLCredential *credential = [NSURLCredential credentialWithUser:#"user" password:#"pass" persistence:NSURLCredentialPersistenceNone];
AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[op setCredential:credential];
op.responseSerializer = [AFJSONResponseSerializer serializer];
[op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON: %#", responseObject);
for(NSDictionary *item in responseObject){
[arr addObject:item];
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
[[NSOperationQueue mainQueue] addOperation:op];
NSLog(#"%#",arr);// here arr getting null or empty
I am getting the response object fine but if I want to use responseObject outside of the success block then object gets null.
Can anybody help me?
Related
I want to get some data from web service and it works fine bu now I want to store the returned value from a variable from a block, but the variable's value is changed only inside the block and it returns null outside the block, how can I do it ? here is my code:
-(void)getDataFromServer:(NSString *) urlString{
__block id returnedData;
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSURLCredential *credential = [NSURLCredential credentialWithUser:username password:password persistence:NSURLCredentialPersistenceNone];
NSMutableURLRequest *request = [manager.requestSerializer requestWithMethod:#"GET" URLString:urlString parameters:nil];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setCredential:credential];
[operation setResponseSerializer:[AFJSONResponseSerializer alloc]];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
// NSLog(#"Success: %#", responseObject);
returnedData = responseObject;
NSLog(#"returned data%#" , returnedData); // here returnedData contains the value that I need to store
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failure: %#", error);
} ];
[manager.operationQueue addOperation:operation];
NSLog(#"returned data%#" , returnedData); // here it returns null value !!
}
The problem is not with access to the variable, it is with the timing.
Your second NSLog statement is running before the completion block is run. The operation runs asynchronously, and you're logging returnedData before it is set in the completion block.
Edit to add an example solution:
One solution would be to create the completion block in your calling class and past into the operation in the getDataFromServer: method.
- (void)getDataFromServer:(NSString *)urlString completion:(void (^)(AFHTTPRequestOperation *operation, id responseObject))completion {
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSURLCredential *credential = [NSURLCredential credentialWithUser:username password:password persistence:NSURLCredentialPersistenceNone];
NSMutableURLRequest *request = [manager.requestSerializer requestWithMethod:#"GET" URLString:urlString parameters:nil];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setCredential:credential];
[operation setResponseSerializer:[AFJSONResponseSerializer alloc]];
[operation setCompletionBlockWithSuccess:completion];
[manager.operationQueue addOperation:operation];
}
How can I run multiple requests inside the success block of 1 request and wait for it to finish?
[manager GET:url parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"%# Response: \n%#", url, responseObject);
resultsArray = [[NSMutableArray alloc] init];
for (NSDictionary *json in [responseObject objectForKey:#"items"]) {
[self getDetails:json];
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[SVProgressHUD dismiss];
}];
Where in getDetails:(id)json is the method to load the group of requests whose parameters are based on the result of the main request.
For example:
I would like to request from the API a list of students, then on the success block. For each student, I would like to get the related data from another table (another request) and put them on my NSObject.
EDIT Here is my getDetails method
- (AFHTTPRequestOperation *)getDetails:(NSDictionary *)json
{
NSLog(#"Start Op %#",[json objectForKey:#"related_salon"]);
NSString *url = [NSString stringWithFormat:#"%#read/salons/%#",SERVER_API_URL,[json objectForKey:#"related_salon"]];
NSURLRequest *req = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:req];
//op.responseSerializer = [AFJSONResponseSerializer serializer];
[op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"Success %#",[json objectForKey:#"name"]);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failed Op %#",error.localizedDescription);
}];
//AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:req];
//op.responseSerializer = [AFJSONResponseSerializer serializer];
[op start];
return op;
}
The AFNetworking GET method returns a ATHTTPRequestOperation (an NSOperation subclass). You could have your getDetails method return that object. You can then create a new operation dependent upon those operations, which you'd run at the end:
NSOperation *completionOperation = [NSBlockOperation blockOperationWithBlock:^{
// add here whatever you want to perform when all the getDetails calls are done,
// e.g. maybe you want to dismiss your HUD when all the requests are done.
[SVProgressHUD dismiss];
}];
[manager GET:url parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"%# Response: \n%#", url, responseObject);
resultsArray = [[NSMutableArray alloc] init];
for (NSDictionary *json in [responseObject objectForKey:#"items"]) {
NSOperation *operation = [self getDetails:json];
[completionOperation addDependency:operation];
}
[[NSOperationQueue mainQueue] addOperation:completionOperation];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[SVProgressHUD dismiss];
}];
Again, this is presuming that getDetails is doing its own GET call, and that you change getDetails to (a) capture the NSOperation returned by GET and (b) return it.
Here below is my jsp call:
NSString *strURL = [NSString stringWithFormat:#"https://xxx.com/xx/jsp/Implementation/getMyResource.jsp?uid=xxxxx"];
NSURL *urlLink = [[NSURL alloc] initWithString:strURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:urlLink];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:urlRequest];
operation.responseSerializer = [AFXMLParserResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSXMLParser *xmlParser = (NSXMLParser*)responseObject;
NSLog(#"%#",xmlParser);
NSError * parsedError = nil;
NSDictionary *dictUserDetails = [XMLReader dictionaryForNSXMLParser:xmlParser error:&parsedError];
if (parsedError == nil) {
NSLog(#"%#",dictUserDetails);
}
else
{
NSLog(#"wrong while parsing xml data");
}
} failure:^(AFHTTPRequestOperation *request, NSError *error){
NSLog(#"Error:------>%#", [error description]);
}];
No response at all. When i paste strURL link in web browser i get response instantly, so no problem in url.
You need to add your AFHTTPRequestOperation to the queue:
[[NSOperationQueue mainQueue] addOperation:operation];
See https://github.com/AFNetworking/AFNetworking#get-with-afhttprequestoperation
i am really new to IOS developments..i just want to get some JSON response from my web service. when i searched about it i found AFnetworking is good for that. so i downloaded it and did a sample application. but i need to pass some parameters to the service . my service takes two parameters [username and password]. my url like this
http://myweb.mobile.com/WebServices/AppointmentService.asmx/GetValidUser
can anyone please give me some code sample how to pass my parameters to this service to get json response ?
i have tried this code.. but it wont take parameters.. some people telling about AFHTTPClient.. but im using AFN 2.0.. there is no class call AFHTTPCLient here .. i'm so conduced here....please help me
NSURL *url = [NSURL URLWithString:#"https://maps.googleapis.com/maps/api/place/textsearch/json?query=restuarants+in+sydney&sensor=false&key=AIzaSyDn9a-EvJ875yMxZeINmUP7CwbO9YT1w2s"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 2
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
// 3
self.googlePlaces = [responseObject objectForKey:#"results"];
[self.tableView reloadData];
// NSLog(#"JSON RESULT %#", responseObject);
self.weather = (NSDictionary *)responseObject;
self.title = #"JSON Retrieved";
[self.tableView reloadData];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
// 4
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Error Retrieving Weather"
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alertView show];
}];
// 5
[operation start];
EDIT :
i have sloved my problem using below code segments...
NSDictionary *parameters = [[NSDictionary alloc] initWithObjectsAndKeys:#"47", #"caregiverPersonId", nil];
AFSecurityPolicy *policy = [[AFSecurityPolicy alloc] init];
[policy setAllowInvalidCertificates:YES];
AFHTTPRequestOperationManager *operationManager = [AFHTTPRequestOperationManager manager];
[operationManager setSecurityPolicy:policy];
operationManager.requestSerializer = [AFJSONRequestSerializer serializer];
operationManager.responseSerializer = [AFJSONResponseSerializer serializer];
[operationManager POST:#"your full url goes here"
parameters:parameters
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON: %#", [responseObject description]);
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", [error description]);
}
];
Try this
-(void)login
{
NSMutableDictionary *dict=[[NSMutableDictionary alloc]initWithCapacity:3];
[dict setObject:_usernameTextField.text forKey:#"userName"];
[dict setObject:_passwordTextField.text forKey:#"password"];
AFHTTPClient *client=[[AFHTTPClient alloc]initWithBaseURL:[NSURL URLWithString:#""]];
[client registerHTTPOperationClass:[AFJSONRequestOperation class]];
[client setDefaultHeader:#"Accept" value:#"application/json"];
client.parameterEncoding = AFJSONParameterEncoding;
[client postPath:#"GetValidUser" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSDictionary *op=(NSDictionary *)responseObject;
NSLog(#"%#",op);
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:MESSAGE_EN message:#"Unable to login. Please try again." delegate:self cancelButtonTitle:OK_EN otherButtonTitles:nil, nil];
[alert show];
NSLog(#"error.localizedDescription %#",error.localizedDescription);
}];
}
Note : Please do fill the fields with proper values and try.
dict is the Input postdata
I got this one from somewhere in SO question. See this:
- (IBAction)loginButtonPressed {
NSURL *baseURL = [NSURL URLWithString:#"http://myweb.mobile.com/WebServices/AppointmentService.asmx"];
//build normal NSMutableURLRequest objects
//make sure to setHTTPMethod to "POST".
//from https://github.com/AFNetworking/AFNetworking
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:baseURL];
[httpClient defaultValueForHeader:#"Accept"];
NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
[usernameTextField text], kUsernameField,
[passwordTextField text], kPasswordField,
nil];
NSMutableURLRequest *request = [httpClient requestWithMethod:#"POST"
path:#"http://myweb.mobile.com/WebServices/AppointmentService.asmx/GetValidUser" parameters:params];
//Add your request object to an AFHTTPRequestOperation
AFHTTPRequestOperation *operation = [[[AFHTTPRequestOperation alloc]
initWithRequest:request] autorelease];
//"Why don't I get JSON / XML / Property List in my HTTP client callbacks?"
//see: https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-FAQ
//mattt's suggestion http://stackoverflow.com/a/9931815/1004227 -
//-still didn't prevent me from receiving plist data
//[httpClient registerHTTPOperationClass:
// [AFPropertyListParameterEncoding class]];
[httpClient registerHTTPOperationClass:[AFHTTPRequestOperation class]];
[operation setCompletionBlockWithSuccess:
^(AFHTTPRequestOperation *operation,
id responseObject) {
NSString *response = [operation responseString];
NSLog(#"response: [%#]",response);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"error: %#", [operation error]);
}];
//call start on your request operation
[operation start];
[httpClient release];
}
Hope this helps .. :)
EDIT
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager POST:URLString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFormData:[email dataUsingEncoding:NSUTF8StringEncoding]
name:#"email"];
[formData appendPartWithFormData:[pass dataUsingEncoding:NSUTF8StringEncoding]
name:#"password"];
// etc.
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"Response: %#", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
Use below code
NSDictionary *paramDictionary = [NSDictionary dictionaryWithObjectsAndKeys:#"first_Object",#"first_Key",#"second_Object",#"second_Key" nil];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager POST:#"YOUR_URL_STRING" parameters:paramDictionary success:^(AFHTTPRequestOperation *operation, id responseObject) {Success responce} failure:^(AFHTTPRequestOperation *operation, NSError *error) {failure responce}];
if you want you can set
manager.responseSerializer = [AFJSONResponseSerializer serializer];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
manager.securityPolicy.allowInvalidCertificates = YES;
My code currently looks like this
NSURL *URL = [NSURL URLWithString:URLForSend];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]
initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSLog(#"%#", responseObject);
[BoxJsonDataHelper gotNewJson:responseObject];
} failure:^(AFHTTPRequestOperation *operation, NSError *error)
{
NSLog(#"Request Failure Because %#",[error userInfo]);
}];
[operation start];
But when trying to edit dictionaries in object received, I get an error about using methods that belongs to a mutable dictionary rather than a dictionary.
How do I make AFNetworking use nested mutable objects instead?
You tell the AFJSONResponseSerializer that it needs to return mutable containers:
operation.responseSerializer =
[AFJSONResponseSerializer serializerWithReadingOptions: NSJSONReadingMutableContainers]
It is all very well documented: http://cocoadocs.org/docsets/AFNetworking/2.0.0/