Question

我对此很新。我已将所有NSDictionary存储到NSArray，现在我想要检索数据。我不知道该怎么做。请帮帮我。我希望获得密钥和数据，并希望在UITableView中显示数据。我有所有东西只检索部分正在等待。

以下是我的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;
},

Answer 1

有几种方法可以访问数据。首先，我建议您查看NSArray（https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/）和NSDictionary（https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSDictionary_Class/）的文档

要访问NSArray的某个元素，您可以执行以下操作：

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

获得字典后，有许多方法可以访问密钥和数据。如果您有密钥并且想要特定值，则可以执行以下操作：

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

（注意上面使用的是速记 - 你也可以做更详细的[dict objectForKey:@"Needle Description"]）

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

NSArray *keys = [dict allKeys];

然后，您可以遍历这些键，并逐项轮询值。

再次，查看文档以了解更多获取信息的方法。

从iOS中的NSArray中检索数据

1 个答案: