Dictionary and JSON format strings are converted to each other

Source: Internet
Author: User

In iOS development, and server interactions, dictionaries and JSON format strings are often used to convert to each other.

1. JSON format string to dictionary

+ (Nsdictionary *) dictionarywithjsonstring: (NSString *) jsonstring {        if (jsonstring = nil) {        return nil;    }        NSData *jsondata = [jsonstring datausingencoding:nsutf8stringencoding];        Nserror *err;        Nsdictionary *dic = [nsjsonserialization jsonobjectwithdata:jsondata                                                                                 options:nsjsonreadingmutablecontainers                                                                                   error:&err];        if (err) {                NSLog (@ "JSON parse failed:%@", err);                return nil;    }    return DIC;}

2. Dictionary to JSON format string

+ (nsstring*) Dictionarytojson: (nsdictionary *) dic{        nserror *parseerror = nil;        NSData *jsondata = [nsjsonserialization datawithjsonobject:dic options:nsjsonwritingprettyprinted error:& ParseError];        return [[NSString alloc] Initwithdata:jsondata encoding:nsutf8stringencoding];    }

Dictionary and JSON format strings are converted to each other

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