iOS开发中字符串和字典的转换

1.字符串转字典

NSString * jsonString = @“123”;NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData                                                       options:NSJSONReadingMutableContainers                                                       error:&err];

2.字典转字符串

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic                                                    options:NSJSONWritingPrettyPrinted                                                      error:&parseError];NSString * str = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];