I'm trying to get the list of friends from twitter.
I'm trying this code: But i receive a NSDictionary with 5 keys: Next cursor, previous cursors, next cursor str, previous cursor str and users: the key user has 20 objects in value..but all are empty...
Whats wrong?
-(void) obterInformacoesTwitter {
NSURL *url = [NSURL URLWithString:#"https://api.twitter.com/1.1/friends/list.json"];
NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init];
[parameters setObject:_contaSelecionada.username forKey:#"screen_name"];
NSLog(#"Screen name %#", _contaSelecionada.username);
TWRequest *request = [[TWRequest alloc] initWithURL:url parameters:parameters requestMethod:TWRequestMethodGET];
request.account = _contaSelecionada;
[request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error)
{
if (responseData) {
NSError *error = nil;
NSDictionary* dict = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableLeaves error:&error];
NSArray *dictArray = [dict valueForKey:#"users"];
if([dict objectForKey:#"error"]!=nil)
{
}
else
{
}
}
}];
[parameters release];
[request release];
}
Have you tried if the JSON valid? With some online JSON viewers, I get:
JSON data URL inaccessable.
Related
Unable to parse this json data to object. Same code i tried with other URL, working correct. Please Suggest where i am doing wrong?
-(void)callAPI{
NSData *data=[NSData dataWithContentsOfURL:[NSURL URLWithString:#"https:s.json"]];
NSError *error=nil;
id response=[NSJSONSerialization JSONObjectWithData:data options:
NSJSONReadingMutableContainers | NSJSONReadingMutableLeaves error:&error];
if (error) {
NSLog(#"%#",[error localizedDescription]);
} else {
NSLog(#"%#",response);}}
Output The data couldn’t be read because it isn’t in the correct format.
I got the very perfect solution for your question which works fine now.Please check the below answer
- (void)callAPI
{
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setHTTPMethod:#"GET"];
[request setURL:[NSURL URLWithString:#"https://dl.dropboxusercontent.com/s/2iodh4vg0eortkl/facts.json"]];
[[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:
^(NSData * data,
NSURLResponse * response,
NSError * error) {
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
NSLog(#"jsonString is: %#", jsonString);
NSData *dataCon = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
id jsonVal = [NSJSONSerialization JSONObjectWithData:dataCon options:0 error:nil];
if([jsonVal isKindOfClass:[NSDictionary class]]) {
NSLog(#"The response starts with NSDictionary");
NSArray *arrJsonVal = [jsonVal objectForKey:#"rows"];
NSMutableArray *arrTitle = [[NSMutableArray alloc]init];
NSMutableArray *arrDesc = [[NSMutableArray alloc]init];
NSMutableArray *arrImage = [[NSMutableArray alloc]init];
for(NSDictionary *dict in arrJsonVal) {
NSString *strTitle = [dict objectForKey:#"title"];
NSString *strDesc = [dict objectForKey:#"description"];
NSString *strImage = [dict objectForKey:#"imageHref"];
[arrTitle addObject:strTitle];
[arrDesc addObject:strDesc];
[arrImage addObject:strImage];
}
NSLog(#"arrTitle is - %#",arrTitle);
NSLog(#"arrDesc is - %#",arrDesc);
NSLog(#"arrImage is - %#",arrImage);
}else {
NSLog(#"The response starts with NSArray");
}
}] resume];
}
The Printed results are
After that
Then Array results are
Finally the results are
I'm trying to build an app on the Feedly API. In order to be able to mark categories as read, I need to post some data to the API. I'm having no success, though.
This is what the API needs as input:
{
"lastReadEntryId": "TSxGHgRh4oAiHxRU9TgPrpYvYVBPjipkmUVSHGYCTY0=_1449255d60a:22c3491:9c6d71ab",
"action": "markAsRead",
"categoryIds": [
"user/c805fcbf-3acf-4302-a97e-d82f9d7c897f/category/design",
"user/c805fcbf-3acf-4302-a97e-d82f9d7c897f/category/photography"
],
"type": "categories"
}
And this is my method:
- (void)markCategoryAsRead: (NSString*)feedID{
NSLog(#"Feed ID is: %#", feedID);
NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];
NSString *accessToken = [standardUserDefaults objectForKey:#"AccessToken"];
NSString *feedUrl = [NSURL URLWithString:#"https://sandbox.feedly.com/v3/markers"];
NSError *error = nil;
NSDictionary *tmp = [[NSDictionary alloc] initWithObjectsAndKeys:
#"markAsRead", #"action",
#"categories", #"type",
#[feedID], #"categoryIds",
#"1367539068016", #"asOf",
nil];
NSData *postdata = [NSJSONSerialization dataWithJSONObject:tmp options:0 error:&error];
NSLog(#"Postdata is: %#", postdata);
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:feedUrl];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-type"];
[request addValue:accessToken forHTTPHeaderField:#"Authorization"];
//[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[url host]];
NSError *errror = [[NSError alloc] init];
NSHTTPURLResponse *response = nil;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&errror];
NSLog(#"Response code: %ld", (long)[response statusCode]);
if ([response statusCode] >= 200 && [response statusCode] < 300)
{
NSLog(#"It's marked as read.");
} else {
if (error) NSLog(#"Error: %#", errror);
NSLog(#"No success marking this as read. %#", response);
}
}
It keeps throwing a 400 error though, saying bad input. What am I doing wrong?
You're not doing anything with postdata after creating it. Attach it to the request.
[request setHTTPBody:postData];
There are a few problems in your code. Here are some I noticed:
You're not using postData.
The dictionary you make in tmp doesn't look like the dictionary you said you wanted to send. Where's lastReadEntryId, for example?
NSString *feedUrl should be NSURL *feedUrl
Stylistically, you should be using the dictionary literal syntax to create your dictionary. This will make it easier to debug.
How would I loop through the JSON returned by a TWRequest to get the geo information of a tweet? I am using the code below - I have marked up the bit I am unsure about. the text component works fine, I'm just not sure how to create the array of geo data and access this...
- (void)fetchTweets
{
AppDelegate *delegate = (AppDelegate*)[[UIApplication sharedApplication]delegate];
//NSLog(#"phrase carried over is %#", delegate.a);
// Do a simple search, using the Twitter API
TWRequest *request = [[TWRequest alloc] initWithURL:[NSURL URLWithString:
[NSString stringWithFormat:#"http://search.twitter.com/search.json?q=%#", delegate.a]]
parameters:nil requestMethod:TWRequestMethodGET];
// Notice this is a block, it is the handler to process the response
[request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error)
{
if ([urlResponse statusCode] == 200)
{
// The response from Twitter is in JSON format
// Move the response into a dictionary and print
NSError *error;
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
//NSLog(#"Twitter response: %#", dict);
NSArray *results = [dict objectForKey:#"results"];
//Loop through the results
for (NSDictionary *tweet in results) {
// Get the tweet
NSString *twittext = [tweet objectForKey:#"text"];
//added this one - need to check id NSString is ok??
NSString *twitlocation = [tweet objectForKey:#"geo"];
// Save the tweet to the twitterText array
[_twitterText addObject:twittext];
//this is the loop for the location
[twitterLocation addObject:twitlocation];
}
dispatch_async(dispatch_get_main_queue(), ^{
[self.tableView reloadData];
});
}
else
NSLog(#"Twitter error, HTTP response: %i", [urlResponse statusCode]);
}];
}
"geo" is deprecated and probably not filled at all. I far as I remember it was deprecated in Twitter API v1.0 too. Try this code:
- (void)fetchTweets
{
AppDelegate *delegate = (AppDelegate*)[[UIApplication sharedApplication]delegate];
//NSLog(#"phrase carried over is %#", delegate.a);
// Do a simple search, using the Twitter API
TWRequest *request = [[TWRequest alloc] initWithURL:[NSURL URLWithString:
[NSString stringWithFormat:#"http://search.twitter.com/search.json?q=%#", delegate.a]]
parameters:nil requestMethod:TWRequestMethodGET];
// Notice this is a block, it is the handler to process the response
[request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error)
{
if ([urlResponse statusCode] == 200)
{
// The response from Twitter is in JSON format
// Move the response into a dictionary and print
NSError *error;
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
//NSLog(#"Twitter response: %#", dict);
NSArray *results = [dict objectForKey:#"results"];
//Loop through the results
for (NSDictionary *tweet in results) {
// Get the tweet
NSString *twittext = [tweet objectForKey:#"text"];
//added this one - need to check id NSString is ok??
id jsonResult = [tweet valueForKeyPath:#"coordinates.coordinates"];
if ([NSNull null] != jsonResult) {
if (2 == [jsonResult count]) {
NSDecimalNumber* longitude = [jsonResult objectAtIndex:0];
NSDecimalNumber* latitude = [jsonResult objectAtIndex:1];
if (longitude && latitude) {
// here you have your coordinates do whatever you like
[twitterLocation addObject:[NSString stringWithFormat:#"%#,%#", latitude, longitude]];
}
else {
NSLog(#"Warning: bad coordinates: %#", jsonResult);
}
}
else {
NSLog(#"Warning: bad coordinates: %#", jsonResult);
}
}
// Save the tweet to the twitterText array
[_twitterText addObject:twittext];
}
dispatch_async(dispatch_get_main_queue(), ^{
[self.tableView reloadData];
});
}
else
NSLog(#"Twitter error, HTTP response: %i", [urlResponse statusCode]);
}];
}
I'm making URL Request to an API but I dont know how to render the JSON, It generates an array of multiple users like this [{"user": "value"}, {"user":"value"}] and I was trying to use a TableView so I need an NSDictionary but i think is better to render a JSON like {users: [{"user": "value"}, {"user":"value"}]}. I have this code to make the request
#import "JSONKit.h"
NSError *error = nil;
NSURLResponse *response = nil;
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: #"http://localhost:3000/getusers"]];
[request setHTTPMethod:#"GET"];
NSData *jsonData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
users = [[jsonData objectFromJSONData] objectForKey:#"users"];
usersKeys = [users allKeys];
but I'm getting this error
2012-09-16 18:51:11.360 tableview[2979:c07] -[JKArray allKeys]: unrecognized selector sent to instance 0x6d30180
2012-09-16 18:51:11.362 tableview[2979:c07] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[JKArray allKeys]: unrecognized selector sent to instance 0x6d30180'
I dont really know how to accomplish this so any help is useful, thanks
You are getting that error because whatever got parsed out of "jsonData" isn't necessarily what you expected (i.e. a dictionary).
Perhaps you need some error checking in that code of yours.
For example:
NSData *jsonData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if(jsonData)
{
id objectReturnedFromJSON = [jsonData objectFromJSONData];
if(objectReturnedFromJSON)
{
if([objectReturnedFromJSON isKindOfClass:[NSDictonary class]])
{
NSDictionary * dictionaryFromJSON = (NSDictionary *)objectReturnedFromJSON;
// assuming you declared "users" & "usersKeys" in your interface,
// or somewhere else in this method
users = [dictionaryFromJSON objectForKey:#"users"];
if(users)
{
usersKeys = [users allKeys];
} else {
NSLog( #"no users in the json data");
}
} else {
NSLog( #"no dictionary from the data returned by the server... check the data to see if it's valid JSON");
}
} else {
NSLog( #"nothing valid returned from the server...");
}
} else {
NSLog( #"no data back from the server");
}
I was thinking on something like this
NSError *error = nil;
NSURLResponse *response = nil;
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: #"http://localhost:3000/getusers"]];
[request setHTTPMethod:#"GET"];
NSData *jsonData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
JSONDecoder *decoder = [[JSONDecoder alloc]
initWithParseOptions:JKParseOptionNone];
NSArray *json = [decoder objectWithData:jsonData];
NSMutableArray *objects = [[NSMutableArray alloc] init];
NSMutableArray *keys = [[NSMutableArray alloc] init];
for (NSDictionary *user in json) {
[objects addObject:[user objectForKey:#"user" ]];
[keys addObject:[user objectForKey:#"value" ]];
}
users = [[NSDictionary alloc] initWithObjects:objects forKeys:keys];
NSLog(#"users: %#", users);
usersKeys = [users allKeys];
But it doesnt look efficient for many items or im wrong?
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
returning UIImage from block
Hi I'm trying to return dictionary of json twitter data so i can use it in my application. How ever it is being called from a async block. I can not save it or return it any thoughts?
-(NSDictionary *)TweetFetcher
{
TWRequest *request = [[TWRequest alloc] initWithURL:
[NSURL URLWithString: #"http://search.twitter.com/search.json?
q=iOS%205&rpp=5&with_twitter_user_id=true&result_type=recent"] parameters:nil
requestMethod:TWRequestMethodGET];
[request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse
*urlResponse,
NSError *error)
{
if ([urlResponse statusCode] == 200)
{
NSError *error;
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseData
options:0 error:&error];
//resultsArray return an array [of dicitionaries<tweets>];
NSArray* resultsArray = [dict objectForKey:#"results"];
for (NSDictionary* internalDict in resultsArray)
NSLog([NSString stringWithFormat:#"%#", [internalDict
objectForKey:#"from_user_name"]]);
----> return dict; // i need this dictionary of json twitter data
}
else
NSLog(#"Twitter error, HTTP response: %i", [urlResponse statusCode]);
}];
}
Thnx in advance!
I feel like I've written a ton of this async code lately.
- (void)tweetFetcherWithCompletion:(void(^)(NSDictionary *dict, NSError *error))completion
{
NSURL *URL = [NSURL URLWithString:#"http://search.twitter.com/search.json?q=iOS%205&rpp=5&with_twitter_user_id=true&result_type=recent"];
TWRequest *request = [[TWRequest alloc] initWithURL:URL parameters:nil requestMethod:TWRequestMethodGET];
[request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
if ([urlResponse statusCode] == 200) {
NSError *error;
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
if (error) {
completion(nil, error);
return;
}
//resultsArray return an array [of dicitionaries<tweets>];
NSArray* resultsArray = [dict objectForKey:#"results"];
for (NSDictionary* internalDict in resultsArray)
NSLog(#"%#", [internalDict objectForKey:#"from_user_name"]);
completion(dict, nil);
}
else {
NSLog(#"Twitter error, HTTP response: %i", [urlResponse statusCode]);
completion(nil, error);
}
}];
}
So, instead of calling self.tweetDict = [self TweetFetcher];, you would call it this way.
[self tweetFetcherWithCompletion:^(NSDictionary *dict, NSError *error) {
if (error) {
// Handle Error Somehow
}
self.tweetDict = dict;
// Everything else you need to do with the dictionary.
}];