I am getting response from server and saving in NSString like this
NSString *strValue = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"str is %#",strValue);
----here is the strValue
"{\"Response\" : [{\"Responsecode\" : \"0\" , \"Response\" : \"Success\"}] , \"Data\" : [{\"ID\":1,\"DistributorID\":1,\"RoleID\":0,\"UserName\":\"admin\",\"Password\":\"LEDdWe3AXsJy+ECechi3fQ==\",\"Fname\":\"AHPrepaid.Ltd\",\"Lname\":\"\",\"EmailID\":\"info#ahprepaid.com\",\"MobileNumber\":\"9711679656\",\"IsActive\":true,\"ActiveFromDtTm\":\"\\\/Date(1432105200000)\\\/\",\"ActiveToDtTm\":\"\\\/Date(1440918000000)\\\/\",\"CreatedBy\":1,\"CreatedDtTm\":\"\\\/Date(1432190029013)\\\/\",\"ModifiedBy\":1,\"ModifiedDtTm\":\"\\\/Date(1460112809167)\\\/\",\"ClientType\":1,\"Name\":\"Company\",\"Currency\":\"USD\",\"ClientTypeID\":1,\"CurrencyId\":1}]}"
now i want to get NSDictionary from that nsstring (strValue)
i tried like this
NSError *jsonError;
NSData *objectData = [strValue dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:objectData
options:2 error:&jsonError];
NSLog(#"json is : %#",json);
but i am getting json is null . how to get the json object from the strValue.
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.
How to check if a NSString is a valid json string in iOS? Did oc have the api to check a nesting is a valid json string ?
you can use NSJSONSerialization to convert NSString to Dictionary. If invalid json string format function will return error
NSError *error = nil;
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
id json = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
if (error) {
// handle error here
}
Check to NSString class is valid..
NSError *err;
id objJson = [NSJSONSerialization JSONObjectWithData:[yourstring dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:&err];
if ([objJson isKindOfClass:[NSString class]]) {
// valid string
} else {
// Not valid string
}
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);
}
The code:
NSURL * url=[NSURL URLWithString:#"alamghareeb.com/mobileData.ashx?catid=0&No=10"];
NSData * data=[NSData dataWithContentsOfURL:url];
NSError * error;
NSMutableDictionary * json = [NSJSONSerialization JSONObjectWithData:data options: NSJSONReadingMutableContainers error: &error];
NSMutableArray * referanceArray=[[NSMutableArray alloc]init];
NSMutableArray * periodArray=[[NSMutableArray alloc]init];
NSArray * responseArr = [NSArray arrayWithArray:json[#"item"]];
for (NSDictionary * dict in responseArr) {
[referanceArray addObject:[dict objectForKey:#"created"]];
}
The JSON looks like:
{
"item" = [
{
"id" : "2292",
"created" : "10/01/2015 10:21:18 ص",
"title" : "الإمارات: ملابس رياضية فاخرة لتحسين أداء الإبل في السباقات ",
"image_url" : "http://alamghareeb.com/Photos/L63556482078696289044.jpg",
"image_caption" : ""
},
{
"id" : "2291",
"created" : "10/01/2015 09:28:11 ص",
"title" : "طبيبة تجميل 'مزورة' تحقن مرضاها بالغراء والاسمنت",
"image_url" : "http://alamghareeb.com/Photos/L63556478891290039015.jpg",
"image_caption" : ""
}
]
}
This JSON is not valid. Did you build it manually? The "item" = ... should be "item" : ....
In the future, you can run your JSON through http://jsonlint.com to verify any issues. Likewise, you should add error checking in your Objective-C code, e.g.
NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:data options: NSJSONReadingMutableContainers error: &error];
if (!json) {
NSLog(#"JSON parsing error: %#", error);
}
I'd also suggest changing your server code to not build JSON manually, but take advantage of JSON functions (e.g. if PHP, build associative arrays and then generate JSON output using the json_encode function).
So, once you fix the JSON error, to parse the results might look like:
NSError *error;
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
if (!dictionary) {
NSLog(#"NSJSONSerialization error: %#", error);
return;
}
NSArray *items = dictionary[#"item"];
for (NSDictionary *item in items) {
NSString *identifier = item[#"id"];
NSString *created = item[#"created"];
NSString *title = item[#"title"];
NSString *urlString = item[#"image_url"];
NSString *caption = item[#"image_caption"];
NSLog(#"identifier = %#", identifier);
NSLog(#"created = %#", created);
NSLog(#"title = %#", title);
NSLog(#"urlString = %#", urlString);
NSLog(#"caption = %#", caption);
}
You can use NSJSONSerialization. No need to import any class.
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:[strResult dataUsingEncoding:NSUTF8StringEncoding] options:0 error:nil];
or use NSData directly as
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:theJSONDataFromTheRequest options:0 error:nil];
Source : Stackoveflow question
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.