iOS对象（数组）转化为JSon字符串

- (void)seabc

{

    NSArray *arry=[NSArray arrayWithObjects:@"0081",@"0082",@"0083", nil];

    NSString *ss = [self objArrayToJSON:arry];

    NSString * datsa = [NSString stringWithFormat:@"pictures=%@",ss];

    NSLog(@"jsonStr==%@",datsa);

    NSString *url = [NSString stringWithFormat:@"http://app.y-x-q.cn/index.php/interfaces/Articleapi/test1"];

    [RequstHttp postWithPathURL:url params:datsa succes:^(NSData *json) {

        NSLog(@"json:%@",[[NSString alloc]initWithData:json encoding:NSUTF8StringEncoding]);

    } failure:^(NSError *error) {

    }];

}

//把多个json字符串转为一个json字符串

- (NSString *)objArrayToJSON:(NSArray *)array {

    NSString *jsonStr = @"[";

    for (NSInteger i = 0; i < array.count; ++i) {

        if (i != 0) {

            jsonStr = [jsonStr stringByAppendingString:@","];

        }

        jsonStr = [jsonStr stringByAppendingString:array[i]];

    }

    jsonStr = [jsonStr stringByAppendingString:@"]"];

    return jsonStr;

}

iOS对象（数组）转化为JSon字符串

原文：http://www.cnblogs.com/shenlaiyaoshi/p/7776784.html