So i have gotten my Json data in which i have got:
{
"name": "brad"
}
I am trying to store that individual name as a string.
#try
{
NSError *error;
NSString *url_string = [NSString stringWithFormat: #"http://Share/scripts/newjson.json"];
///Dummy URL
NSData *data = [NSData dataWithContentsOfURL: [NSURL URLWithString:url_string]];
NSMutableArray *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSLog(#"json: %#", json);
}
#catch (NSException *e)
{
NSLog(#"Internet not enabled");
//something went wrong
//populate the NSError object so it can be accessed
}
But when i print out the json file i just get what is shown above, do i need to use a delimiter or something to get this string ?
Thanks
Actually the JSON is a dictionary not an array and with nilOptions not mutable.
To get brad write
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSString *name = json[#"name"];
NSLog(#"name: %#", name);
Related
I want to fetch value of description from the below response. In body few more key-value pairs are there. I have tried, unfortunately am failing to crack. My code is in Objective C.
And My code for Parsing as below
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:notification.request.content.userInfo options:0 error:NULL];
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(#"After Validation JSON VALUE IS : %#", jsonString);
NSData *BodyData = [NSJSONSerialization dataWithJSONObject:[[[notification.request.content.userInfo objectForKey:#"aps"] objectForKey:#"alert"] objectForKey:#"body"] options:0 error:NULL];
NSString *BodyString = [[NSString alloc] initWithData:BodyData encoding:NSUTF8StringEncoding];
NSLog(#"After Validation JSON VALUE IS : %#", BodyString);
Here is my complete response. I want to fetch all the values from body section.
{
"aps":{
"alert":{
"title":"Your bill is ready from shop My Store",
"body":"{\"shop_id\":\"16\",\"shop_name\":\"My Store\",\"description\":\"Thank you for Shopping\",\"notification_type\":\"bill\",\"shop_category\":\"entertainment\",\"bill_date\":\"2018-01-13\",\"bill_url\":\"dXBsb2FkLzRvcmVfMDExMzIwMTgtMTY0NjI5LnBkZg==\",\"approve\":1}"
},
"sound":"1"
},
"gcm.message_id":"0:1515842219916508%a1c76c71a1c76c71",
"gcm.notification.vibrate":"1"
}
convert your body string to json
NSString*bodyKeyValue = #"{\"shop_id\":\"16\",\"shop_name\":\"My Store\",\"description\":\"Thank you for Shopping\",\"notification_type\":\"bill\",\"shop_category\":\"entertainment\",\"bill_date\":\"2018-01-13\",\"bill_url\":\"dXBsb2FkLzRvcmVfMDExMzIwMTgtMTY0NjI5LnBkZg==\",\"approve\":1}"; //[[[notification.request.content.userInfo objectForKey:#"aps"] objectForKey:#"alert"] objectForKey:#"body"];
NSData *data = [bodyKeyValue dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary* jsonOutput = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(#"%#",jsonOutput);
NSLog(#"approve Key value:%#",[jsonOutput objectForKey:#"approve"]);
I have JSON data that looks as such:
{
"dataset": {
"id": ,
"dataset_code": "",
"database_code": "",
"name": "",
"description": "",
"refreshed_at": "",
}
}
When I go to NSLog the JSON data using the "dataset" identifier it prints fine. However I want to access the next level of JSON data which is what I'm looking to use. However, when I try to NSLog the next level I get an error in xcode. My code looks as such:
NSString *query = #"jsonwebsite.com";
NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:query]];
_Array = [[NSMutableArray alloc] init];
_Array = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];
So if I use this it's logs fine.
NSString *testString = [_Array valueForKey:#"dataset"];
NSLog(#"%#",testString);
But as mentioned, I'm looking for the next set of data and when I try this, it gives an error.
NSString *testString = [_Array valueForKey:#"name"];
NSLog(#"%#",testString);
It returns (null). How would I be able to access the name field in this JSON data?
There is a lot wrong with your code.
_Array = [[NSMutableArray alloc] init];
_Array = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];
There is no point to creating an empty array in the first line, only to replace it with a different object in the second line.
Your data contains a dictionary of dictionaries, not an array. You should create a variable dictionary:
NSMutableDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];
You should not use valueForKey to fetch values from your dictionary. That is a KVO method. Use objectForKey instead, or better yet, use modern dictionary syntax:
NSMutableDictionary *dataSet = dictionary[#"dataset"];
NSString *name = dataSet[#"name"];
if (name == nil) {
NSLog(#"name is nil");
}
else if (name.length == 0) {
NSLog(#"name is empty");
}
else {
NSLog(#"Name is %#", name);
}
your json is a NSDictionary not a NSMutableArray,you used a NSMutableArray to recieve a NSDictionary was wrong.
test this:
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];
NSDictionary *subDict = dict[#"dataset"];
NSLog(#"%#", subDict);
NSLog(#"%#", subDict[#"name"]);
Change this code:
NSString *query = #"jsonwebsite.com";
NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:query]];
_Array = [[NSMutableArray alloc] init];
_Array = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];
NSString *testString = [_Array valueForKey:#"name"];
NSLog(#"%#",testString);
into this:
NSString *query = #"jsonwebsite.com";
NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:query]];
_Array = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];
NSDictionary *dataSet = [_Array objectForKey:#"dataset"];
NSString *testString = [dataSet objectForKey:#"name"];
NSLog(#"%#",testString);
I use openweathermap API to print current weather. I need to parse this JSON (JSON with available cities). I tried to parse it with NSJSONSerializer, but the answer was :"error NSError * domain: #"NSCocoaErrorDomain" - code: 3840".
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"city.list" ofType:#"json"];
NSString *myJSON = [[NSString alloc] initWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
NSError *error;
NSData *objectData = [myJSON dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:objectData options:NSJSONReadingMutableContainers error:&error];
As i understand, error 3840 says about wrong JSON format, but i have downloaded JSON from official openweathermap page. What's wrong? How parse this JSON correctly?
The file is no valid JSON, but a list of valid JSONs.
{"_id":707860,"name":"Hurzuf","country":"UA","coord":{"lon":34.283333,"lat":44.549999}}
{"_id":519188,"name":"Novinki","country":"RU","coord":{"lon":37.666668,"lat":55.683334}}
{"_id":1283378,"name":"Gorkhā","country":"NP","coord":{"lon":84.633331,"lat":28}}
…
Such a list in a valid JSON would look like this …:
[
{"_id":707860,"name":"Hurzuf","country":"UA","coord":{"lon":34.283333,"lat":44.549999}},
{"_id":519188,"name":"Novinki","country":"RU","coord":{"lon":37.666668,"lat":55.683334}},
{"_id":1283378,"name":"Gorkhā","country":"NP","coord":{"lon":84.633331,"lat":28}},
…
]
… or like this …
{
{"707860": {"name":"Hurzuf","country":"UA","coord":{"lon":34.283333,"lat":44.549999}},
{"519188": {"name":"Novinki","country":"RU","coord":{"lon":37.666668,"lat":55.683334}},
{"1283378":{"name":"Gorkhā","country":"NP","coord":{"lon":84.633331,"lat":28}},
…
However, what you can do is to iterate over the list and convert it item separately:
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"city.list" ofType:#"json"];
NSString *myList = [[NSString alloc] initWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
// Separate the lines
NSArray *myItems = [myList componentsSeperatedByCharactersInSet:[NSCharacterSet newLineCharacterSet];
NSError *error;
for( NSString *JSON in myItems )
{
if( [JSON length]==0)
{
// empty line
continue;
}
NSData *objectData = [JSON dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *object = [NSJSONSerialization JSONObjectWithData:objectData options:NSJSONReadingMutableContainers error:&error];
if( object == nil )
{
NSLog( #"Error %# reading\n%#", error, JSON);
}
}
Your json is not formatted correctly.
{"_id":707860,"name":"Hurzuf","country":"UA","coord":{"lon":34.283333,"lat":44.549999}}
{"_id":519188,"name":"Novinki","country":"RU","coord":{"lon":37.666668,"lat":55.683334}}
should be
[{"_id":707860,"name":"Hurzuf","country":"UA","coord":{"lon":34.283333,"lat":44.549999}},
{"_id":519188,"name":"Novinki","country":"RU","coord":{"lon":37.666668,"lat":55.683334}},
...]
Note the encapsulating square brackets and commas at the end.
Or you could parse the text line-by-line (it seems it is ment to be parsed like that).
Here's my JSON
{
"name": "abe",
}
and this is a part of my code
self.fileRoot = [[NSBundle bundleForClass:[self class]] pathForResource:#"name" ofType:#"json"];
self.jsonString = [NSString stringWithContentsOfFile:self.fileRoot encoding:NSUTF8StringEncoding error:nil];
self.jsonParser = [[SBJsonParser alloc] init];
self.dict = [self.jsonParser objectWithString:self.jsonString];
NSLog(#"\njsonString: %#\njsonParser: %#\ndict: %#\n", self.jsonString, self.jsonParser, self.dict);
the log is:
jsonString: {
"name": "abe",
}
jsonParser: <SBJsonParser: 0x8d6b7f0>
dict: (null)
I have the problem that's why dict said "(null)"
I'm pretty sure this code used to work when I tested it last time(about 3 months ago)
Any suggestion? Thank you in advance.
Remove the comma from the key value pair, since you just have a single name-value pair in json string
//convert string to NSData
NSString* str = #"{'name':'abe'}";
NSData* data = [str dataUsingEncoding:NSUTF8StringEncoding];
//create dictionary
NSError *error = nil;
NSDictionary *dict = [NSJSONSerialization
JSONObjectWithData: data
options:0
error:&error];
NSLog(#"Name: %#", dict[#"name"]);
I am getting the following response from server
[{"id":"16","name":"Bob","age":"37"},{"id":"17","name":"rob","age":"28"}];
I am using AFNetworking framework for it,
I am getting the above response in NSData and then using the the below code, I am able to collect the data in NSDictionary
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingAllowFragments error:&error];
But how to parse the "name" and "age" value from that NSDictionary?
You expected NSDictionary but your response gives you array of dictionaries, try this:
NSArray *array = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingAllowFragments error:&error];
for (NSDictionary *dict in array)
{
NSLog(#"Name: %#, age: %#", dict[#"name"], dict[#"age"]);
}
//Extended
From the comment below it looks like you have a string from the response, not NSArray as you show in the code above.
You can parse string to get the data you want or you can convert it back to the json and NSArray:
NSString * jsonString = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingAllowFragments error:&error];
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSArray *array = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
//As I post above
Now you should have an NSArray and my code should do the job.