I have a JSON string as an NSString object in iOS. I want to parse this and pull out the given parameters in the JSON string. Is there a efficient way to parse this or is the only way to search for substrings etc.?
Add a comment |
2 Answers
The way to do it with iOS 5 is to use the NSJSONSerialization class. You will want to first convert your string to an NSData object, and call the class method JSONObjectWithData
NSData *jsonData = [myJsonString dataUsingEncoding:NSUTF8StringEncoding]; NSError *e; NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:jsonData options:nil error:&e]; Note that JSONObjectWithData will return either an NSDictionary or an NSArray, depending whether your JSON string represents an a dictionary or an array.
1 Comment
Tom Susel
Notice that you should use 0 or NSJSONReadingMutableContainers for the options to suppress the compiler warning.
A good framework for converting JSON strings to Objective-C objects (NSArray and NSDictionary) is SBJson (Github).
Usage:
NSDictionary *dict = [myJsonString JSONValue]; 
3 Comments
user1120008
Is there a way to do it with iOS 5 JSON?
Evan Mulawski
Yes, but it is more involved and limits your application to running only on iOS 5.
aroth
I agree, SBJSON is your friend. Much more convenient than the official API, and works with older iOS versions too.