How can I use the iTunes search API from within iOS/Obj-c ?
I know of this link of course..
http://www.apple.com/itunes/affiliates/resources/documentation/itunes-store-web-service-search-api.html
I just don't understand how you use obj-c/iOS with it.
I want to be able to read the JSON results, whether they be broad or just 1 result and store the apps name (or would that be ID?), any images, rating etc in my server database (using parse.com).
How can I do that, and is that allowed by the Apple developer terms?
It looks like you just make the requests and parse the results. No auth or anything else fancy...
NSString *urlString = #"https://itunes.apple.com/search?term=jack+johnson";
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
if (!error) {
NSError* parseError;
id parse = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&parseError];
NSLog(#"%#", parse);
}
}];
The JSON parser will yield arrays of dictionaries for collection calls and (probably) dictionaries for single objects.
Related
Trying to parse simple JSON data from Instagram but stuck with this problem.
JSON data returns truncated in application, but everything is ok via browser on my mac.
Tried to do that many different ways, but all the same.
First way:
NSURL *instaGetRecentOwnerPhotosURL = [NSURL URLWithString:#"https://api.instagram.com/v1/users/self/media/recent/?access_token=MY_PROPER_TOKEN"];
NSData *jsonData = [NSData dataWithContentsOfURL:instaGetRecentOwnerPhotosURL];
Another way, assync:
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:#"https://api.instagram.com/v1/users/self/media/recent/?access_token=MY_PROPER_TOKEN"]];
__block NSDictionary *json;
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
json = [NSJSONSerialization JSONObjectWithData:data
options:0
error:nil];
NSLog(#"Async JSON: %#", json);
}];
JSON data returns like that:
screenshot of truncated json
Absolutely have no idea what is wrong.
It's not truncated. The log simply only shows part of the output. If it was really truncated it either wouldn't have parsed at all or it would just have fewer entries. But the data did parse. There is nothing wrong with json.
BTW - do proper error checking:
NSError *error = nil;
json = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
if (json) {
// Data is good. Work with 'json'
} else {
NSLog(#"Unable to parse JSON. Error: %#", error);
}
I have a web service that allows me to update records on in our database.
The columns in the table are as follows:
allowsActions
assetID
inventoryObjectID
objectDescription
quantity
retired
serialNumber
action
I'm using the following to GET data from the webservice.
NSString *urlString = [NSString stringWithFormat:#"%#", inventoryAndActionsWebservice];
NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"GET"];
Then shoving into a dictionary like so:
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError)
{
if (data.length > 0 && connectionError == nil)
{
NSLog(#"WE HAS THE DATAS");
NSDictionary *inventory = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];
// Then storing the values in CoreData here
}
}
What would be the syntax for updating the webservice? It expects an object in the body of the service call (POST).
NSMutableURLRequest let's you setHTTPBody: and setHTTPMethod:.#"POST"is the way to do a post. Most services need to know the body length and encoding set in headers. (seeaddValue:forHTTPHeaderField:`) for that.
The only reason this topic is tricky is because the developer is forced to grapple with two problems at once: what constitutes a valid request for my server, and (2) how do I form that request with iOS? Part (2) is actually pretty easy once you get a valid request.
The best way to proceed is to get an example working using curl (or something equivalent). Then move on to producing that request in iOS. If you have trouble, ask a question here of the form: "I know my server needs X, here's my code to produce X, but I'm getting this error Y".
So the syntax that I was looking for was ultimately this:
NSString *jSONString = [NSString stringWithFormat:#"{\"MediaInventoryObjectsId\":%d,\"AssetId\":%d,\"Quantity\":%d,\"SerialNumber\":\"%#\",\"Description\":\"%#\",\"AllowActions\":%d,\"Retired\":%d}",inventoryObjectId, assetID, quantity, serialNumber, description, allowActions, retired];
// Convert jSON string to data
NSData *putData = [jSONString dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
// Instantiate a url request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
// Set the request url format
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#"%#/%d", inventoryAndActionsWebservice, inventoryObjectId]]];
[request setHTTPMethod:#"PUT"];
[request setHTTPBody:putData];
[request setValue:#"application/json" forHTTPHeaderField:#"content-type"];
// Send data to the webservice
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
I am new to ios,so inorder to get accesstoken, i followed the link
http://technogerms.com/login-with-google-using-oauth-2-0-for-ios-xcode-objective-c/ .so in these link they used json.h files are they mandatory.if it is yes then explain me about json github in these link.
Here is the link what you want.
https://github.com/johnezang/JSONKit
Use native NSJSONSerialization class, you can find more info on below link,
iOS NSJSONSerialization
How to use NSJSONSerialization
There is no compulsory to use JSON.h in your project. Now You can use inbuilt apple JSON parser. IF you want to download JSon library then link is
Download JSon file from here
Otherwise you can use this Inbuilt apple JSON Parser by using following method.
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableLeaves || NSJSONReadingMutableContainers error:&myError];
The full code is as below:
NSString *urlString=[NSString stringWithFormat:#"%#listcontact.php?uid=%#&page=0",LocalPath,appdel.strid]; //---- Add your URL for webservice-----
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
There are two NSURLConnection request methods AsynchronousRequest and SynchronousRequest.
(1) For AsynchronousRequest
[NSURLConnection sendAsynchronousRequest:urlRequest queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
{
NSError *error1;
NSDictionary *res=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:&error1];
}];
(2) For SynchronousRequest
NSData *GETReply = [NSURLConnection sendSynchronousRequest:urlRequest returningResponse:nil error:nil];
NSError *myError = nil;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:GETReply options:NSJSONReadingMutableLeaves error:&myError];
I have seen some post which uses google translate web page.
NSString* englishString = [englishInputArray objectAtIndex:i];
NSString *urlPath = [NSString stringWithFormat:#"/translate_a/t?client=t&text=%#&langpair=en|fr",englishString];
NSURL *url = [[NSURL alloc] initWithScheme:#"http" host:#"translate.google.com" path:urlPath];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:url];
[request setHTTPMethod:#"GET"];
NSURLResponse *response;
NSError *error;
NSData *data;
data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *result = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
NSLog(#"Text: %#",result);
I have two questions:
1)the json return from the web page look like this
[[["Bonjour","Hello","",""]],[["interjection",["bonjour","salut","all\u00f4","tiens"]]],"en",,[["Bonjour",[5],1,0,1000,0,1,0]],[["Hello",4,,,""],["Hello",5,[["Bonjour",1000,1,0]],[[0,5]],"Hello"]],,,[],1]
Other than doing string manipulation is there a way to get the the exact translation string alone ie in tis case "Bonjour" alone.
2: Does anybody know if this is this a free service ? Google apis seems to be a paid service. But if you use web page is that a free service.
No. All API's I've used have always been either JSON or XML. There is no reason to use string manipulation when you can just parse the data into a readable structure
If you are looking to use another service that isn't paid, keep in mind there are normally strict limitations. Try something like: SDL https://www.beglobal.com/developers/api-documentation/
Have you read Google's Translate API Documentation?
https://developers.google.com/translate/
For example performing a GET request like so
GET https://www.googleapis.com/language/translate/v2?key=INSERT-YOUR-KEY&source=en&target=de&q=Hello%20world
Should return the following response:
{
"data": {
"translations": [
{
"translatedText": "Hallo Welt"
}
]
}
}
With this you can just parse the JSON and display the data
I have generated JSON data from Java Restful WebServices and I need to put into the Objective C code. How can I use the JSON data and integrate into Objective C? The IDE has generated the local URL, how can I use the generated JSON data in other machine. Thank you
Have a look at NSURLConnection to retrieve the JSON from your web service. Then you can make use of NSJSONSerialization to parse it.
Use any of the many JSON parsers available. This question compares a few of them: Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc)
You can request the NSData from the URL and then use NSJSONSerialization to interpret it. For example:
NSURL *url = [NSURL URLWithString:#"http://www.put.your.url.here/test.json"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
if (error) {
NSLog(#"%s: sendAsynchronousRequest error: %#", __FUNCTION__, error);
return;
}
NSError *jsonError = nil;
NSArray *results = [NSJSONSerialization JSONObjectWithData:data options:0 error:&jsonError];
if (jsonError) {
NSLog(#"%s: JSONObjectWithData error: %#", __FUNCTION__, jsonError);
return;
}
// now you can use the array/dictionary you got from JSONObjectWithData; I'll just log it
NSLog(#"results = %#", results);
}];
Clearly, that assumed that the JSON represented an array. If it was a dictionary, you'd replace the NSArray reference with a NSDictionary reference. But hopefully this illustrates the idea.