处理JSON响应中的字符串或整数

Question

If catData is a dictionary returned from a rest API call:

NSString* catId = catData[@"id"];

This is fine if catData[@"id"] is a string. Not so much if it's an int or something else.

I tried this:

NSString* catId = [catData[@"id"] stringValue];

But that results in this:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSTaggedPointerString stringValue]: unrecognized selector sent to instance 0xa000030383130365'

How can I properly handle any type of value and get it converted to the string that I need?

I'm using AFNetworking with AFJSONResponseSerializer.

Answer 1

instead of using

NSString* catId = [catData[@"id"] stringValue

both case use

NSString* catId = catData[@"id"];

crash happen because you are trying to convert string to string value