Ios 从字符串到字典？还是先到json再到字典？获取字符串的键的对象

我有一个字符串，然后我需要它作为json，这样我就可以解析它并获得键的对象

例如，我需要数组中ID为key的所有对象显示在表中。 我怎么用绳子呢

建议

下面是字符串：

{
  "COMMON": {
    "RESULT_CD": "0000",
    "RESULT_MSG": "SUCCESS",
    "CATEGORY": "computing",
    "SVC_ID": "7",
    "TARGET": "list(VM)",
    "REQUEST_DATE": "201410271741",
    "PAGE_NO": 0,
    "NUM_PER_PAGE": 0
  },
  "DATA": {
    "VM_LIST": [
      {
        "@SVC_ID": "7",
        "ID": "VMSPE0000000083",
        "VM_ALIAS": "CV00900000083",
        "VM_OPER_DESC": "Power On",
        "MACHIN_STATUS_DESC": "[150748]success:virtual machine power on",
        "USVC_DESC": "7/Running, No Change r/hurhurhur, Inc.",
        "PURPOSE_NM": "Service_Default",
        "VIRT_TYPE_DESC": "Para Virtualization",
        "SERVER_STATUS_MSG": "VM running",
        "VCPU_CNT": "2",
        "MEM_SIZE_MB": "1024",
        "VNIC_CNT": "1",
        "OS_NAME": "CentOS_6.4_en_64"
      },
      {
        "@SVC_ID": "7",
        "ID": "VMSPE0000000093",
        "VM_ALIAS": "CV00900000093",
        "VM_OPER_DESC": "Reboot",
        "MACHIN_STATUS_DESC": "[150749]success:virtual machine reboot",
        "USVC_DESC": "7/Running, No Change r/hurhurhur, Inc.",
        "PURPOSE_NM": "Service_Default",
        "VIRT_TYPE_DESC": "Para Virtualization",
        "SERVER_STATUS_MSG": "VM running",
        "VCPU_CNT": "1",
        "MEM_SIZE_MB": "2048",
        "VNIC_CNT": "1",
        "OS_NAME": "Gentoo _2011-0 _en_64"
      },
      {
        "@SVC_ID": "7",
        "ID": "VMSPE0000000096",
        "VM_ALIAS": "CV00900000096",
        "VM_OPER_DESC": "Vm Initialization",
        "MACHIN_STATUS_DESC": "[163023]success:virtual machine running",
        "USVC_DESC": "7/Running, No Change r/hurhurhur, Inc.",
        "PURPOSE_NM": "Service_Default",
        "VIRT_TYPE_DESC": "Para Virtualization",
        "SERVER_STATUS_MSG": "VM running",
        "VCPU_CNT": "2",
        "MEM_SIZE_MB": "1024",
        "VNIC_CNT": "1",
        "OS_NAME": "OpenSuse_12.1_en_64"
      }
    ]
  }
}

编辑：

下面是我在谷歌上搜索到的内容

NSDictionary *JSON =
                 [NSJSONSerialization JSONObjectWithData: [response dataUsingEncoding:NSUTF8StringEncoding]
                                                 options: NSJSONReadingMutableContainers
                                                   error:nil];

但是，将字符串NSLog与JSON NSLog进行比较

字符串：

{
  "COMMON": {
    "RESULT_CD": "0000",
    "RESULT_MSG": "SUCCESS",
    "CATEGORY": "computing",
    "SVC_ID": "7",
    "TARGET": "list(VM)",
    "REQUEST_DATE": "201410271757",
    "PAGE_NO": 0,
    "NUM_PER_PAGE": 0
  },
  "DATA": {
    "VM_LIST": [
      {
        "@SVC_ID": "7",
        "ID": "VMSPE0000000083",
        "VM_ALIAS": "CV00900000083",
        "VM_OPER_DESC": "Power On",
        "MACHIN_STATUS_DESC": "[150748]success:virtual machine power on",
        "USVC_DESC": "7/Running, No Change r/hurhurhur, Inc.",
        "PURPOSE_NM": "Service_Default",
        "VIRT_TYPE_DESC": "Para Virtualization",
        "SERVER_STATUS_MSG": "VM running",
        "VCPU_CNT": "2",
        "MEM_SIZE_MB": "1024",
        "VNIC_CNT": "1",
        "OS_NAME": "CentOS_6.4_en_64"
      },
      {
        "@SVC_ID": "7",
        "ID": "VMSPE0000000093",
        "VM_ALIAS": "CV00900000093",
        "VM_OPER_DESC": "Reboot",
        "MACHIN_STATUS_DESC": "[150749]success:virtual machine reboot",
        "USVC_DESC": "7/Running, No Change r/hurhurhur, Inc.",
        "PURPOSE_NM": "Service_Default",
        "VIRT_TYPE_DESC": "Para Virtualization",
        "SERVER_STATUS_MSG": "VM running",
        "VCPU_CNT": "1",
        "MEM_SIZE_MB": "2048",
        "VNIC_CNT": "1",
        "OS_NAME": "Gentoo _2011-0 _en_64"
      },
      {
        "@SVC_ID": "7",
        "ID": "VMSPE0000000096",
        "VM_ALIAS": "CV00900000096",
        "VM_OPER_DESC": "Vm Initialization",
        "MACHIN_STATUS_DESC": "[163023]success:virtual machine running",
        "USVC_DESC": "7/Running, No Change r/hurhurhur, Inc.",
        "PURPOSE_NM": "Service_Default",
        "VIRT_TYPE_DESC": "Para Virtualization",
        "SERVER_STATUS_MSG": "VM running",
        "VCPU_CNT": "2",
        "MEM_SIZE_MB": "1024",
        "VNIC_CNT": "1",
        "OS_NAME": "OpenSuse_12.1_en_64"
      }
    ]
  }
}

JSON:

json缺少一些东西

---

这样可以吗？

首先将字符串存储在数组中，然后您可以使用以下命令将其转换为jsonobject

[NSJSONSerialization JSONObjectWithData:[yourArray dataUsingEncoding:NSUTF8StringEncoding] options:0 error:NULL]

---

您可以使用名为NSJSONSerialization的内置iOS功能将NSString转换为Json格式。为此，您必须将NSString转换为NSData

// jsonString = your string
NSError *err;
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
id objectChecker = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&err];

if ([objectChecker isKindOfClass:[NSArray class]])
{
    //your object is NSArray.
}
else if([objectChecker isKindOfClass:[NSDictionary class]])
{
    //your object is NSDictionary.
}
else 
{
    //your string doesn't contain proper json format.
}

---

也许这对你有帮助

你知道关于NSJSONSerialization的任何事情吗？…或者关于Google的任何事情吗？请检查编辑，谢谢你你的JSON被成功解析到NSDictionary。您在控制台中看到的只是NSDictionary的描述字符串表示，它看起来不像JSON。

// jsonString = your string
NSError *err;
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
id objectChecker = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&err];

if ([objectChecker isKindOfClass:[NSArray class]])
{
    //your object is NSArray.
}
else if([objectChecker isKindOfClass:[NSDictionary class]])
{
    //your object is NSDictionary.
}
else 
{
    //your string doesn't contain proper json format.
}