iOS JSON、NSDictionary互转

#import "myCode.h"

@implementation myCode

/*!

 * @brief 把格式化的JSON格式的字符串转换成字典

 * @param jsonString JSON格式的字符串

 * @return 返回字典

 */

+ (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解析失败：%@",err);

        return nil;

    }

    return dic;

}

+ (NSString*)dictionaryToJson:(NSDictionary *)dic

{

    NSError *parseError = nil;

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];

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

}

@end