在IOS中从2个数组创建JSON

我正在尝试创建字典以将JSON数据发布到服务器：

NSArray *keys = [NSArray arrayWithObjects:@"lat", @"lon", nil];
NSArray *values = [NSArray arrayWithObjects: orderClass.extraLat, orderClass.extraLon, nil];
NSDictionary *postDict = [NSDictionary dictionaryWithObjects:values forKeys:keys];

这给了我：

{
    lat =     (
        "54.720746",
        "54.719206",
        "54.717466"
    );
    lon =     (
        "56.011108",
        "56.008510",
        "56.007031"
    );
}

但目的是以以下格式发布来自阵列的数据：

[{"lat":"54.720746", "lon":"56.011108" },
 { "lat":"54.719206", "lon":"56.008510"},
 { "lat":"54.717466", "lon":"56.007031"}]

我需要你的帮助。

---

谢谢你的关注

正如我在评论中所说，你需要朝着你的目标倒退。首先是字典，然后是数组。你会得到你想要的

NSArray *keys = [NSArray arrayWithObjects:@"lat", @"lon", nil];
NSArray *lats = [NSArray arrayWithObjects:@"1", @"2", @"3", nil];
NSArray *lons = [NSArray arrayWithObjects:@"4", @"5", @"6", nil];

// your way (not what you want)
NSArray *values = [NSArray arrayWithObjects: lats, lons, nil];
NSDictionary *postDict = [NSDictionary dictionaryWithObjects:values forKeys:keys];

// my recommendation based on what you want
NSMutableArray *postData = [[NSMutableArray alloc] init];
for (int i = 0; i < lats.count; i++) {
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
    [dict setObject:[lats objectAtIndex:i] forKey:@"lat"];
    [dict setObject:[lons objectAtIndex:i] forKey:@"lon"];
    [postData addObject:dict];
}

及

（lldb）po postData
(
{
lat=1；
lon=4；
},
{
lat=2；
lon=5；
},
{
lat=3；
lon=6；
}
)

您正在创建一个包含两个数组的字典。您需要使用三个字典（在您的示例中，通常是“n”）创建数组。换一下台阶。谢谢你，太多了！目标实现了！

(lldb) po postDict
{
    lat =     (
        1,
        2,
        3
    );
    lon =     (
        4,
        5,
        6
    );
}

(lldb) po postData
<__NSArrayM 0x7ffb5be4d950>(
{
    lat = 1;
    lon = 4;
},
{
    lat = 2;
    lon = 5;
},
{
    lat = 3;
    lon = 6;
}
)