How to convert NSArray ( in string format) to real Array format? [duplicate]

Question

When i parse one JSON i got following result inside my NSArray

(
    {
    category = Allergies;
    group = Allergies;
    name = "Food Allergies";
    option = "";
    subGroup = "";
    type = VARCHAR;
},
    {
    category = Allergies;
    group = Allergies;
    name = "Drug Allergies";
    option = "";
    subGroup = "";
    type = VARCHAR;
},
    {
    category = Allergies;
    group = "";
    name = "Blood Group";
    option = "[{\"id\":1,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"A+\"},{\"id\":2,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"A-\"},{\"id\":3,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"B+\"},{\"id\":4,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"B-\"},{\"id\":5,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"O+\"},{\"id\":6,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"O-\"},{\"id\":7,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"AB+\"},{\"id\":8,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"AB-\"}]";
    subGroup = "";
    type = SINGLESELECT;
}
)

Now when i tried to take value for key "option"
[array valueForKey:@"option"]objectAtIndex:indexPath.row];

i got following result

 [{"id":1,"isDefault":false,"additionalOption":false,"optionName":"A+"},{"id":2,"isDefault":false,"additionalOption":false,"optionName":"A-"},{"id":3,"isDefault":false,"additionalOption":false,"optionName":"B+"},{"id":4,"isDefault":false,"additionalOption":false,"optionName":"B-"},{"id":5,"isDefault":false,"additionalOption":false,"optionName":"O+"},{"id":6,"isDefault":false,"additionalOption":false,"optionName":"O-"},{"id":7,"isDefault":false,"additionalOption":false,"optionName":"AB+"},{"id":8,"isDefault":false,"additionalOption":false,"optionName":"AB-"}]

but when tried to access "optionName" like following format

[optionArray valueForKey:@"optionName"]; then i got this error

 *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<__NSCFConstantString 0x10d8638a0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key optionName.'

Please help me to fix this..

try using enumeration block

Teja Nandamuri
– Teja Nandamuri

2015-12-02 13:53:59 +00:00
Commented Dec 2, 2015 at 13:53 — Teja Nandamuri
– Teja Nandamuri, Commented Dec 2, 2015 at 13:53

Infinite Recursion · Accepted Answer · 2015-12-09 06:45:07Z

1

Assuming you are using ios 5 or higher, JSON serialization is built in:

NSArray *json = [NSJSONSerialization 
        JSONObjectWithData:[string dataUsingEncoding:NSUTF8StringEncoding]
        options:kNilOptions 
        error:&error];

Prior to ios5, you can use SBJSON to achieve the same:

NSArray *jsonObjects = [jsonParser objectWithString:string error:&error];

edited Dec 9, 2015 at 6:45

Infinite Recursion

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answered Dec 2, 2015 at 13:52

Shubham bairagi

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Comments

Dharmbir Singh · Accepted Answer · 2015-12-02 13:56:49Z

0

Use this method

- (NSArray *)convertStringToDictionary:(NSString *)str{
    NSError *jsonError;
    NSData *objectData = [str dataUsingEncoding:NSUTF8StringEncoding];
    NSArray *json = [NSJSONSerialization JSONObjectWithData:objectData                                               options:NSJSONReadingMutableContainers error:&jsonError];

    return json;
}

And call like this

NSArray *arr =  [self convertStringToDictionary:@"[{\"id\":1,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"A+\"},{\"id\":2,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"A-\"},{\"id\":3,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"B+\"},{\"id\":4,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"B-\"},{\"id\":5,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"O+\"},{\"id\":6,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"O-\"},{\"id\":7,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"AB+\"},{\"id\":8,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"AB-\"}]"];

NSLog(@"Option Name ---->  %@",[[arr objectAtIndex:0] valueForKey:@"optionName"]);

OUTPUT

Option Name ----> A+

edited Dec 2, 2015 at 13:56

answered Dec 2, 2015 at 13:44

Dharmbir Singh

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6 Comments

Kreiri Over a year ago

Why Swift? OP tagged the question with [objective-c].

Bangalore Over a year ago

can u make it in objc pls

Dharmbir Singh Over a year ago

@Kreiri Converted it in ObjC.

Dharmbir Singh Over a year ago

@Bangalore Please have a look on updated answer.

Dharmbir Singh Over a year ago

@Bangalore Please see updated answer which is working perfect.

|

Pinank Lakhani · Accepted Answer · 2015-12-02 14:04:42Z

0

Try using below got to convert to array

 NSArray *tmpDayArray=[[NSArray alloc]init];
 NSError *error;
 NSData *dictData = [NSJSONSerialization dataWithJSONObject:tmpDayArray options:NSJSONWritingPrettyPrinted error:&error];
 NSString *open_days = [[NSString alloc] initWithData:dictData encoding:NSUTF8StringEncoding];

Try Below code for convert it to NSArray

    NSArray * array =[NSJSONSerialization JSONObjectWithData:[[NSString stringWithFormat:@"%@",@"YOUR STRING"] dataUsingEncoding:NSUTF8StringEncoding]options: NSJSONReadingMutableContainers error:nil];

answered Dec 2, 2015 at 14:04

Pinank Lakhani

1

Comments

Duncan C · Accepted Answer · 2015-12-02 14:05:54Z

0

You have a complex "object graph." It looks like your outer object is an array, and inside that you have dictionaries.

If optionArray is an NSArray then it will give you exactly the error you are reporting if you try to treat it as a dictionary.

Your code:

[array valueForKey:@"option"]objectAtIndex:indexPath.row];

Is doing that (Although you are using KVC, where you should be using array and dictionary methods directly.)

Your code should look like this instead:

NSDictionary* aDict = array[indexPath.row];
NSString *optionString = aDict[@"option];

answered Dec 2, 2015 at 14:05

Duncan C

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Comments

Bhuvan Bhatt · Accepted Answer · 2015-12-02 14:09:58Z

0

Without using any third party like SBJson

NSString *optionString  = [[array valueForKey:@"option"]objectAtIndex:indexPath.row];

Actually you are getting optionString as json String so you have to parse it and then use like this

NSData *data = [optionString dataUsingEncoding:NSUTF8StringEncoding];

NSArray * optionArray = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

NSLog(@"%@",[optionArray valueForKey:@"optionName"]);

answered Dec 2, 2015 at 14:09

Bhuvan Bhatt

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