Question

I found this article about parsing JSON response from a URL request i iOS: http://www.raywenderlich.com/2965/how-to-write-an-ios-app-that-uses-a-web-service.

The article uses JSON Framework. I’ve downloaded the newest “SBJson_v3.0.4.zip” from the webpage and dragged in into a new group in my project. But then the build returns 62 errors like:

• ARC forbids explicit message send of ‘release’
• Existing ivar ‘delegate’ for unsafe_unretained property ‘delegate’ must be __unsafe_unretained
• ‘retain’ is unavailable: not available in automatic reference counting mode

Does anybody know why? Is the JSON Framework not compatible with the newest Xcode?

Answer 1

Since iOS 5, iOS has its own JSON parser (thank you Twitter!)

NSError *err = nil;
id result = [NSJSONSerialization JSONObjectWithData:data options:0 error:&err];

Do make sure to check the type of the output – it can be anything from a string to a number to a dictionary to an array.