从iOS中的NSArray检索数据

我对这个很陌生。我已将所有

NSDictionary

存储到

NSArray

中，现在我要检索数据。我不知道怎么做。请帮我做这个。我想获取密钥和数据，并基于此在

UITableView

中显示数据。我有所有的东西，只有检索部分待定

下面是我的

NSArray

：

 {
    Code = MCP3441G;
    "Needle Description" = "1/2 Circle Round Body MH";
    "Needle Dimension" = "31 MM";
    "No. of foils per box" = 12;
    "Per box maximum retail price" = 7440;
    "Per box price to retailers & hospitals" = 5474;
    Size = "2/0";
    "Suture type and length" = "MONOCRYL monofilament 70 CM Violet";
    nid = 86;
},
    {
    Code = NW1641;
    "Needle Description" = "1/2 Circle Round Body";
    "Needle Dimension" = "30 MM";
    "No. of foils per box" = 12;
    "Per box maximum retail price" = 4800;
    "Per box price to retailers & hospitals" = 3510;
    Size = "2/0 Only";
    "Suture type and length" = "MONOCRYL Undyed Monofilament 70 CM";
    nid = 86;
},
    {
    Code = NW1642;
    "Needle Description" = "1/2 Circle Round Body";
    "Needle Dimension" = "30 MM";
    "No. of foils per box" = 12;
    "Per box maximum retail price" = 4800;
    "Per box price to retailers & hospitals" = 3510;
    Size = "1/0";
    "Suture type and length" = "MONOCRYL Undyed Monofilament 70 CM";
    nid = 86;
},
    {
    Code = NW1648;
    "Needle Description" = "3/8 Circle Round Body";
    "Needle Dimension" = "16 MM";
    "No. of foils per box" = 12;
    "Per box maximum retail price" = 3600;
    "Per box price to retailers & hospitals" = 2687;
    Size = "4/0";
    "Suture type and length" = "MONOCRYL Undyed Monofilament 70 cm";
    nid = 86;
},
    {
    Code = NW1663;
    "Needle Description" = "1/2 Circle Oval Round Body J.B";
    "Needle Dimension" = "22 MM";
    "No. of foils per box" = 12;
    "Per box maximum retail price" = 5280;
    "Per box price to retailers & hospitals" = 3870;
    Size = "3/0";
    "Suture type and length" = "MONOCRYL Undyed Monofilament 70 CM";
    nid = 86;
},
    {
    Code = NW1664;
    "Needle Description" = "1/2 Circle Oval Round Body J.B";
    "Needle Dimension" = "26 MM";
    "No. of foils per box" = 12;
    "Per box maximum retail price" = 5880;
    "Per box price to retailers & hospitals" = 4347;
    Size = "3/0";
    "Suture type and length" = "MONOCRYL Undyed Monofilament 70 CM";
    nid = 86;
},

---

有几种访问数据的方法。首先，我建议您查看NSArray（）和NSDictionary（）的文档

要访问NSArray的特定元素，可以执行以下操作：

NSDictionary *dict = (NSDictionary*) myArray[0]; //gets the first item of the array.

NSString *desc = dict[@"Needle Description"]; //gets the value for the key Needle Description

一旦有了字典，就有许多可能的方法来访问密钥和数据。如果您有密钥并且需要特定的值，可以执行以下操作：

NSDictionary *dict = (NSDictionary*) myArray[0]; //gets the first item of the array.

NSString *desc = dict[@"Needle Description"]; //gets the value for the key Needle Description

（注意，上面使用的是速记——您也可以使用更详细的

[dict objectForKey:@“针描述”]

）

您还可以获取所有键的数组（如您在问题中所述，用于在表中列出），但执行以下操作：

NSArray *keys = [dict allKeys];

然后，您可以循环遍历这些键，并逐项轮询值

同样，查看文档，了解更多获取信息的方法