Getting object as singleArrayObject, how to convert in NSMutableArray?

Question

in response, i am getting gas_cylinders key as single array object

"gas_cylinders":["[{\"quantity\":\"2\",\"name\":\"Medium Blue\",\"price\":\"100.0\",\"total_price\":\"200.0\"},{\"quantity\":\"3\",\"name\":\"Green\",\"price\":\"100.0\",\"total_price\":\"300.0\"},{\"quantity\":\"1\",\"name\":\"Dark Green\",\"price\":\"100.0\",\"total_price\":\"100.0\"}]"]

Note:- tripDictionary contain below data..

(lldb) po tripDictionary 
{
    "gas_cylinder_total" = 600;
    "gas_cylinders" =     (
        "[{\"quantity\":\"2\",\"name\":\"Medium Blue\",\"price\":\"100.0\",\"total_price\":\"200.0\"},{\"quantity\":\"3\",\"name\":\"Green\",\"price\":\"100.0\",\"total_price\":\"300.0\"},{\"quantity\":\"1\",\"name\":\"Dark Green\",\"price\":\"100.0\",\"total_price\":\"100.0\"}]"
    );
}

i am taking gas_cylinders like below way..

NSArray *arr = [tripDictionary valueForKey:@"gas_cylinders"];
if (arr && arr.count > 0) {
   NSLog(@"first obj = %@",arr[0]);
}

output of above NSLog like..

first obj = [{"quantity":"2","name":"Medium Blue","price":"100.0","total_price":"200.0"},{"quantity":"3","name":"Green","price":"100.0","total_price":"300.0"},{"quantity":"1","name":"Dark Green","price":"100.0","total_price":"100.0"}]

how can i get this object in NSMutableArray ?

Please update your question showing where tripDictionary comes from. — rmaddy
– rmaddy, Commented Mar 12, 2018 at 14:33
Please don't post pictures of text, post actual text. It's easier to read, it's searchable, and the text can be referenced. — rmaddy
– rmaddy, Commented Mar 12, 2018 at 14:38

rmaddy · Accepted Answer · 2018-03-12 14:42:18Z

2

The data is not what you think it is. The value of the gas_cylinders key is an array of JSON string.

NSArray *cylinders = tripDictionary[@"gas_cylinders"];
NSString *firstCylinder = cylinders[0];

At this point, firstCylinder is a JSON string. You need to parse that JSON string to get the desired array of dictionaries contained in the JSON string.

edited Mar 12, 2018 at 14:42

answered Mar 12, 2018 at 14:24

rmaddy

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1 Comment

Nirav Kotecha Over a year ago

thanks.. after your given answer, converted into NSArray and get desired output...

NSData* data = [firstCylinder dataUsingEncoding:NSUTF8StringEncoding];                 NSArray *values = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

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