Why is the assignment to jsonString not including braces{}?
Here's what I'm getting:
["anemail#chdr.com"]
CODE
if (_allEmails)
{
NSError *error = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:_allEmails options:0 error:&error];
if (!error)
{
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
[dictionary setObject:jsonString forKey:#"AllEmails"];
}
}
The _allEmails variable must be an array (you tell me) and for braces you need to store your data in a dictionary.
Perhaps what you're looking for is:
if ([_allEmails count] > 0)
{
NSError *error = nil;
NSDictionary *dict = #{ #"AllEmails" : _allEmails };
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict
options:0
error:&error];
// Note: Check returned object and not NSError object
if (jsonData) {
NSString *jsonString = [[NSString alloc] initWithData:jsonData
encoding:NSUTF8StringEncoding];
// Do thing with string
} else {
NSLog(#"Failed to serialize JSON: %#", [error localizedDescription]);
}
}
Because a JSON array is not enclosed braces, and what you have above is a JSON array. A JSON "object" is enclosed in braces.
Related
I received NSData object data from REST API. That contains JSON data which I want to parse.
{
JsonResult = "[{
\"IsAuth\":\"true\",
\"User\":\"
[
{
\\\"userid\\\":\\\"josephH\\\",
\\\"firstname\\\":\\\"joseph\\\",
\\\"lastname\\\":\\\"Henry\\\",
}
]\"}]"
}
This statement gave me the result as a String like below which I am not able to parse as JSON.
myData = [data valueForKey:#"JsonResult"];
"[{
\"IsAuth\":\"true\",
\"User\":\"
[
{
\\\"userid\\\":\\\"josephH\\\",
\\\"firstname\\\":\\\"joseph\\\",
\\\"lastname\\\":\\\"Henry\\\",
}
]\"}]"
When I try to pass this mydata to JSONSerialization the code crashes.
How do I cast the above string to NSDictionary so that I can parse them and use the values of IsAuth and User.?
Code:
[LDService authenticateUser:Uname.text passwordString:Password.text completeBlock:^(NSData * data){
NSError *error;
NSData *jsonData;
NSString *jsonString = nil;
NSMutableDictionary *jsonDict;
if([NSJSONSerialization isValidJSONObject:data])
{
jsonData = [NSJSONSerialization dataWithJSONObject:data
options:kNilOptions
error:&error];
jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}
NSString *formattedString = [jsonString stringByReplacingOccurrencesOfString:#"\\\"" withString:#"'"];
NSLog(#"Formatted string %#",formattedString);
[jsonDict setObject:formattedString forKey:#"JsonResult"];
NSLog(#"Parsed json %#",jsonDict);
}];
Pass your data as data
NSError *error;
NSString *jsonString = nil;
if([NSJSONSerialization isValidJSONObject:data])
{
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:data
options:kNilOptions
error:&error];
jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}
then replace occurance of #"\\\" with #"'"
NSString *formattedString = [jsonString stringByReplacingOccurrencesOfString:#"\\\"" withString:#"'"];
then use this formattedString.
I have investigates your json file from Json formatter & Validator, there are lots of error in your json file, so first check your file from this validator and this formatter gives you error with description. Re-build your json file, if you still getting any problem then ask.
I am new to iOS development. I am trying to covert JSOn array values to Objective-C values. My JSON values are like this:
{"result":
[{"alternative":
[{"transcript":"4"},
{"transcript":"four"},
{"transcript":"so"},
{"transcript":"who"}],
"final":true}],
"result_index":0}
I have tried it this way:
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:speechrequestString]];
NSError *error;
NSDictionary *speechResult= [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSArray *speechArray= [speechResult valueForKey:#"result"];
NSLog(#"%#",speechArray);
NSLog(#"Response is of type: %#", [speechArray class]);
speechArray is always null. How to resolvee this problem?
At the same time I would like to print transcript values.
I think the problem might be in initializing the array and Dictionary.
Try doing this,
NSDictionary *speechResult = [NSDictionary new];
NSArray *speechArray = [NSArray new];
Hope it helps..
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];//data is your response from server as NSData
if ([json isKindOfClass:[NSDictionary class]]){ //Added instrospection as suggested in comment.
NSArray * speechArray = json[#"result"];
}
NSLog(#"speech array %#",speechArray);
Did you check the value in NSDictionary (speechResult).
If it is nil, check the json data isValid or not.
NSError *error;
if ([NSJSONSerialization JSONObjectWithData:data
options:kNilOptions
error:&error] == nil)
{
// Check the error here
}else {
// here check whether it is a dictionary and it has key like #Bhadresh Mulsaniya mentioned.
}
If returns nil, then you check the error to understand what's wrong.
try this may be it will help you:-
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:speechrequestString]];
NSError *error;
NSDictionary *speechResult = [NSDictionary new];
speechResult= [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSArray *speechArray = [[NSArray alloc]init];
speechArray= [speechResult valueForKey:#"result"];
NSLog(#"%#",speechArray);
NSLog(#"Response is of type: %#", [speechArray class]);
try this code,
restaurantdictionary = [NSJSONSerialization JSONObjectWithData:mutableData options:NSJSONReadingMutableContainers error:&e];
NSMutableArray *main_array=[[NSMutableArray alloc]init];
main_array=[restaurantdictionary valueForKey:#"results"];
NSLog(#"main_array %#", main_array);
its working for me, hope its helpful
You have to initialize the array before using it,
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:speechrequestString]];
NSError *error;
NSDictionary *speechResult= [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSArray *speechArray= [[NSArray alloc] init];
speechArray= [speechResult valueForKey:#"result"];
if (speechArray.count>0) {
NSDictionary * alternativeDictn = [speechArray objectAtIndex:0];
NSArray *alternativeAry= [[NSArray alloc] init];
alternativeAry = [alternativeDictn objectForKey:#"alternative"];
NSLog(#"%#",alternativeAry);
}
NSLog(#"Response is of type: %#", [speechArray class]);
Using this code you will get following result,
(
{
transcript = 4;
},
{
transcript = four;
},
{
transcript = so;
},
{
transcript = who;
}
)
Try out the below code to get the transcripts:
NSData* jsonData = [yourJsonString dataUsingEncoding:NSUTF8StringEncoding];
NSError *error = nil;
NSDictionary *responseObj = [NSJSONSerialization
JSONObjectWithData:jsonData
options:0
error:&error];
if(! error) {
NSArray *responseArray = [responseObj objectForKey:#"result"];
for (NSDictionary *alternative in responseArray) {
NSArray *altArray = [alternative objectForKey:#"alternative"];
for (NSDictionary *transcript in altArray) {
NSLog(#"transcript : %#",[transcript objectForKey:#"transcript"]);
}
}
} else {
NSLog(#"Error in parsing JSON");
}
You should alloc your dictionary first like this-
NSDictionary *speechResult = [[NSDictionary alloc]init];
speechResult= [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSArray *speechArray = [[NSArray alloc]init];
speechArray= [speechResult valueForKey:#"result"];
I have a dictionary that looks like this.
NSDictionary *dict = #{#"cpu" : self.proData ,
#"date" : timeMilliString,
#"memory" : self.memData,
#"battery" : self.batData,
#"deviceID" : #"1"
};
I'm creating json objects from it like this:
self.jsonObj1 = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
self.jsonObj2 = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
self.jsonObj3 = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
Afterwards I want to put the 3 json objects into a json array and then put that json array into another json object. So finally, it should look something like this:
{"mobileData":[
{ "cpu":-991,
"date":"142441374.5834",
"memory":978,
"battery":-96,
"deviceID" : 2
},
{ "cpu":-51,
"date":"142441374.5834",
"memory":978,
"battery":-96,
"deviceID" : 2
},
{ "cpu":-51,
"date":"142441374.5834",
"memory":978,
"battery":-96,
"deviceID" : 2
}
]
}
I have tried it as follows but it's not working.
NSArray *jsonArray = #[self.jsonObj1, self.jsonObj2, self.jsonObj3];
NSDictionary *dict = #{#"mobileData" : jsonArray};
if ([NSJSONSerialization isValidJSONObject:dict])
{
// Serialize the dictionary
json = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error2];
// If no errors, let's view the JSON
if (json != nil && error2 == nil)
{
NSString *jsonString = [[NSString alloc] initWithData:json encoding:NSUTF8StringEncoding];
NSLog(#"JSON: %#", jsonString);
//[jsonString release];
}
}
I'm getting an exception.
Any ideas? Thanks.
Firstly add all dictionaries to a array.
NSMutableArray *mutArrData = [NSMutableArray array];
//Add dictionaries which vary to your requirement.
[mutArrData addObject:yourDictionary]; //1
[mutArrData addObject:yourDictionary]; //2
[mutArrData addObject:yourDictionary]; //3
Now create a main dictionary to add array.
NSDictionary *dictJsonData = [NSDictionary dictionaryWithObjectsAndKeys:[mutArrData mutableCopy],#"mobileData",nil];
Now create json from dictionary
NSError *error = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dictJsonData options:NSJSONWritingPrettyPrinted error:&error];
if (jsonData && !error)
{
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(#"JSON: %#", jsonString);
}
I am new to iOS. I have this JSON data that I needed to parse:
{
"allseries":[
{
"type":"HR",
"title":"Heart Rate",
"xLabel":"Time",
"yLabel":"Beats per Min",
"defaultUnit":"BPM",
"url":"info/info?user=admin%40korrent.com&type=HR",
"size":18,
"firstTs":1406755651,
"lastTs":1406841254
},
{
"type":"TEMP",
"title":"Temperature",
"xLabel":"Time",
"yLabel":"Temperature",
"defaultUnit":"F",
"url":"info/info?user=admin%40korrent.com&type=TEMP",
"size":6,
"firstTs":1406854147,
"lastTs":1406854283
}
],
"status":"OK"
}
So far this is my code:
NSString *dataReceived= [[NSString alloc] initWithData:_responseData encoding:NSUTF8StringEncoding];
NSLog(#"--> async response data (string): %#", dataReceived);
NSData *jsonData = [dataReceived dataUsingEncoding:NSUTF8StringEncoding];
NSError *jsonError;
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:jsonData options:nil error:&jsonError];
NSLog(#"JSON key and value %#", [dict description]);
NSLog(#" %# ", dict[#"allseries"]);
NSString *jsonString=dict[#"allseries"];
if (_programState == 4){
NSLog(#"state is 4");
NSLog(#"%#",jsonString);
NSData *Data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
However, the code throws invalid argument exception for this line:
NSData *Data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
Further more, jsonString seems totally "inoperable". I cannot split it, append strings to it etc. So what's wrong?
// The following two lines are just for logging and otherwise are not needed.
NSString *dataReceived= [[NSString alloc] initWithData:_responseData encoding:NSUTF8StringEncoding];
NSLog(#"--> async response data (string): %#", dataReceived);
// Deserialize the JSON data into a dictionary
NSError *jsonError;
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData: _responseData options:nil error:&jsonError];
NSLog(#"JSON key and value %#", dict);
// Get the array from the dictionary element "allseries".
NSArray *jsonArray = dict[#"allseries"];
NSLog(#"jsonArray: %#", jsonArray);
Here jsonArray is the array of dictionaries for "allseries" from the JSON
What you did is totally, totally wrong.
dict[#allseries] is not an NSString. It is an NSArray with two elements, and both its elements are NSDictionary.
I am trying to get Dictionary form json, but the following code dosent seem to work. I am getting the JSON, but cannot get the dictionary from it.
NSString *str = [[NSMutableString alloc] initWithData:responseCust encoding:NSUTF8StringEncoding];
NSLog(#"CUSTOMER string -----################ %#", str);
if(str.length>5)
{
SBJSON *jsonparser=[[SBJSON alloc]init];
NSDictionary *res= [jsonparser objectWithString:str];
NSLog(#"Contants Results %#",res);
[jsonparser release];
[str release];
}
Thank You.
Please Follow the below code
NSURL * url=[NSURL URLWithString:str];
NSData * data=[NSData dataWithContentsOfURL:url];
NSError * error;
//Get json data in Dictionary
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options: NSJSONReadingMutableContainers error: &error];
NSLog(#"%#",json);
try this one..
Use NSJSONSerialization and make use of
+ (id)JSONObjectWithData:(NSData *)data options:(NSJSONReadingOptions)opt error:(NSError **)error to convert JSON to foundation object.
hope this helps
Just try to Either
NSDictionary *dict = [str JSONValue];
NSLog(#"%#", dict);
OR
NSError *error;
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseCust options:nil error:&error];
NSLog(#"%#", dict);
+(NSDictionary *)converJsonStringToDictionary:(NSString *)jsonString
{
NSString *stringToConvert = jsonString;
if (![self isObjectEmpty:stringToConvert]) {
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSError *error = nil;
NSDictionary *convertedData = nil;
convertedData = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
if (error != nil){
DLog(#"Error converting jsonString to dictionary: %#", [error description]);
convertedData = nil;
}
else if ([convertedData isKindOfClass:[NSDictionary class]]) {
DLog(#"The converted data is of kind NSDictionary");
}
else if ([convertedData isKindOfClass:[NSArray class]]){
DLog(#"The converted data is of kind NSArray");
convertedData = nil;
}
else{
DLog(#"The converted data is not NSDictionary/NSArray");
convertedData = nil;
}
return convertedData;
}
else{
DLog(#"The received jsonString is nil")
return nil;
}
}
Here, try adding the encoding...
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:&error];
NSLog(#"dict: %#", jsonDict);
Check here for some samples on how to handle json on objective-c