NSArray、NSDictionary 转成 JSONString

1.NSArray转换成JSONString

 //NSArray+JSONString.h

@interface NSArray (JSONString)

- (NSString *)jsonStringWithPrettyPrint:(BOOL)prettyPrint;

@end

@implementation NSArray (JSONString)

-(NSString*) jsonStringWithPrettyPrint:(BOOL) prettyPrint {

    NSError *error;

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:self

                                                       options:(NSJSONWritingOptions) (prettyPrint ? NSJSONWritingPrettyPrinted : 0)

                                                         error:&error];



    if (! jsonData) {

        NSLog(@"jsonStringWithPrettyPrint: error: %@", error.localizedDescription);

        return @"[]";

    } else {

        return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

    }

}

@end

2.NSDictionary 转成 JSONString

 //NSDictionary+JSONString.h

@interface NSDictionary (JSONString)

-(NSString*) jsonStringWithPrettyPrint:(BOOL) prettyPrint;

@end

//NSDictionary+JSONString.m

@implementation NSDictionary (JSONString)



  -(NSString*) jsonStringWithPrettyPrint:(BOOL) prettyPrint {

     NSError *error;

     NSData *jsonData = [NSJSONSerialization dataWithJSONObject:self

                                                   options:(NSJSONWritingOptions)    (prettyPrint ? NSJSONWritingPrettyPrinted : 0)

                                                     error:&error];



     if (! jsonData) {

        NSLog(@"jsonStringWithPrettyPrint: error: %@", error.localizedDescription);

        return @"{}";

     } else {

        return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

     } 

 }

@end