得到j(luò)son文件，并且轉(zhuǎn)換為data類型

//step1:文件路徑
    NSString *jsonPath = [[NSBundle mainBundle]pathForResource:@"MovieList" ofType:@"txt"];
//step2:轉(zhuǎn)化為nsdata類型 
    NSData *jsondata = [NSData dataWithContentsOfFile:jsonPath];
    //解析json數(shù)據(jù)  
    NSDictionary *resultDic = [NSJSONSerialization JSONObjectWithData:jsondata options:NSJSONReadingAllowFragments error:nil];

將Foundtion框架下的對象（一般包括字典和數(shù)組）轉(zhuǎn)化為json串

if ([NSJSONSerialization isValidJSONObject:resultDic]) {
            NSData *strData = [NSJSONSerialization dataWithJSONObject:resultDic options:NSJSONWritingPrettyPrinted error:nil];
            //將data轉(zhuǎn)換為字符串
            NSString *Printstr = [[NSString alloc]initWithData:strData encoding:NSUTF8StringEncoding];
            NSLog(@"%@",Printstr);
        }