ios 怎么把字典转换成字符串

- (void)viewDidLoad {

[super viewDidLoad];

NSDictionary *dict = @{@"aaa":@"11",@"bb":@"22",@"cc":@"33"};

NSString *str = [self dictionaryToJson:dict];

NSDictionary *dict1 = [self dictionaryWithJsonString:str];

NSLog(@"%@",str);

NSLog(@"%@",dict1);

}

/*!

* @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;

}

//词典转换为字符串

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

{

NSError *parseError = nil;

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

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

}