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Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>
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en/application-dev/reference/apis/js-apis-cardEmulation.md
浏览文件 @ aa620b33
# Standard NFC Card Emulation # Standard NFC Card Emulation
The cardEmulation module implements Near-Field Communication (NFC) card emulation. The **cardEmulation** module implements Near-Field Communication (NFC) card emulation.
> **NOTE**<br> > **NOTE**<br>
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version. > The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
## Modules to Import ## Modules to Import
...@@ -19,7 +19,7 @@ isSupported(feature: number): boolean ...@@ -19,7 +19,7 @@ isSupported(feature: number): boolean
Checks whether a certain type of card emulation is supported. Checks whether a certain type of card emulation is supported.
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
...@@ -27,11 +27,11 @@ Checks whether a certain type of card emulation is supported. ...@@ -27,11 +27,11 @@ Checks whether a certain type of card emulation is supported.
| -------- | -------- | | -------- | -------- |
| boolean | Returns **true** if the card emulation is supported; returns **false** otherwise.| | boolean | Returns **true** if the card emulation is supported; returns **false** otherwise.|
## HceService ## HceService<sup>8+</sup>
Implements Host-based Card Emulation (HCE). Before calling any API in **HceService**, you must use **new cardEmulation.HceService()** to create an **HceService** instance. Implements Host-based Card Emulation (HCE). Before calling any API in **HceService**, you must use **new cardEmulation.HceService()** to create an **HceService** instance.
### startHCE ### startHCE<sup>8+</sup>
startHCE(aidList: string[]): boolean startHCE(aidList: string[]): boolean
...@@ -39,7 +39,7 @@ Starts HCE. ...@@ -39,7 +39,7 @@ Starts HCE.
**Required permissions**: ohos.permission.NFC_CARD_EMULATION **Required permissions**: ohos.permission.NFC_CARD_EMULATION
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Parameters** **Parameters**
...@@ -47,7 +47,7 @@ Starts HCE. ...@@ -47,7 +47,7 @@ Starts HCE.
| ------- | -------- | ---- | ----------------------- | | ------- | -------- | ---- | ----------------------- |
| aidList | string[] | Yes | Application ID (AID) list to be registered for card emulation.| | aidList | string[] | Yes | Application ID (AID) list to be registered for card emulation.|
### stopHCE ### stopHCE<sup>8+</sup>
stopHCE(): boolean stopHCE(): boolean
...@@ -55,9 +55,9 @@ Stops HCE. ...@@ -55,9 +55,9 @@ Stops HCE.
**Required permissions**: ohos.permission.NFC_CARD_EMULATION **Required permissions**: ohos.permission.NFC_CARD_EMULATION
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
### on ### on<sup>8+</sup>
on(type: "hceCmd", callback: AsyncCallback<number[]>): void; on(type: "hceCmd", callback: AsyncCallback<number[]>): void;
...@@ -65,7 +65,7 @@ Subscribes to messages from the peer device after **startHCE()**. ...@@ -65,7 +65,7 @@ Subscribes to messages from the peer device after **startHCE()**.
**Required permissions**: ohos.permission.NFC_CARD_EMULATION **Required permissions**: ohos.permission.NFC_CARD_EMULATION
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Parameters** **Parameters**
...@@ -74,7 +74,7 @@ Subscribes to messages from the peer device after **startHCE()**. ...@@ -74,7 +74,7 @@ Subscribes to messages from the peer device after **startHCE()**.
| type | string | Yes | Event type to subscribe to. The value is **hceCmd**. | | type | string | Yes | Event type to subscribe to. The value is **hceCmd**. |
| callback | AsyncCallback<number[]> | Yes | Callback invoked to return the subscribed event. The input parameter is a data array that complies with the Application Protocol Data Unit (APDU).| | callback | AsyncCallback<number[]> | Yes | Callback invoked to return the subscribed event. The input parameter is a data array that complies with the Application Protocol Data Unit (APDU).|
### sendResponse ### sendResponse<sup>8+</sup>
sendResponse(responseApdu: number[]): void; sendResponse(responseApdu: number[]): void;
...@@ -82,7 +82,7 @@ Sends a response to the peer device. ...@@ -82,7 +82,7 @@ Sends a response to the peer device.
**Required permissions**: ohos.permission.NFC_CARD_EMULATION **Required permissions**: ohos.permission.NFC_CARD_EMULATION
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Parameters** **Parameters**
......
en/application-dev/reference/apis/js-apis-connectedTag.md
浏览文件 @ aa620b33
# Active Tag # Active Tag
The **connectedTag** module provides methods for using active tags. You can use the APIs provided by this module to initialize the active tag chip and read and write active tags.
> **NOTE**<br> > **NOTE**<br>
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version. > The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
...@@ -22,9 +24,9 @@ Initializes the active tag chip. ...@@ -22,9 +24,9 @@ Initializes the active tag chip.
**System capability**: SystemCapability.Communication.ConnectedTag **System capability**: SystemCapability.Communication.ConnectedTag
- Return value - Return value
| **Type** | **Description** | | **Type**| **Description**|
| -------- | -------- | | -------- | -------- |
| boolean | Returns **true** if the initialization is successful; returns **false** otherwise. | | boolean | Returns **true** if the initialization is successful; returns **false** otherwise.|
## connectedTag.uninit ## connectedTag.uninit
...@@ -38,9 +40,9 @@ Uninitializes the active tag resources. ...@@ -38,9 +40,9 @@ Uninitializes the active tag resources.
**System capability**: SystemCapability.Communication.ConnectedTag **System capability**: SystemCapability.Communication.ConnectedTag
- Return value - Return value
| **Type** | **Description** | | **Type**| **Description**|
| -------- | -------- | | -------- | -------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise. | | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
## connectedTag.readNdefTag ## connectedTag.readNdefTag
...@@ -54,14 +56,14 @@ Reads the content of this active tag. This method uses a promise to return the r ...@@ -54,14 +56,14 @@ Reads the content of this active tag. This method uses a promise to return the r
**System capability**: SystemCapability.Communication.ConnectedTag **System capability**: SystemCapability.Communication.ConnectedTag
- Return value - Return value
| **Type** | **Description** | | **Type**| **Description**|
| -------- | -------- | | -------- | -------- |
| Promise&lt;string&gt; | Promise used to return the content of the active tag. | | Promise&lt;string&gt; | Promise used to return the content of the active tag.|
- Example - Example
``` ```
import connectedTag from '@ohos.connectedTag'; import connectedTag from '@ohos.connectedTag';
connectedTag.readNdefTag().then(result => { connectedTag.readNdefTag().then(result => {
console.log("promise recv ndef response: " + result); console.log("promise recv ndef response: " + result);
}); });
...@@ -78,9 +80,9 @@ Reads the content of this active tag. This method uses an asynchronous callback ...@@ -78,9 +80,9 @@ Reads the content of this active tag. This method uses an asynchronous callback
**System capability**: SystemCapability.Communication.ConnectedTag **System capability**: SystemCapability.Communication.ConnectedTag
- Parameters - Parameters
| **Name** | **Type** | **Mandatory** | **Description** | | **Name**| **Type**| **Mandatory**| **Description**|
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| callback | AsyncCallback&lt;string&gt; | Yes | Callback invoked to return the active tag content obtained. | | callback | AsyncCallback&lt;string&gt; | Yes| Callback invoked to return the active tag content obtained.|
- Example - Example
``` ```
...@@ -102,14 +104,14 @@ Writes data to this active tag. This method uses a promise to return the result. ...@@ -102,14 +104,14 @@ Writes data to this active tag. This method uses a promise to return the result.
**System capability**: SystemCapability.Communication.ConnectedTag **System capability**: SystemCapability.Communication.ConnectedTag
- Parameters - Parameters
| **Name** | **Type** | **Mandatory** | **Description** | | **Name**| **Type**| **Mandatory**| **Description**|
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| data | string | Yes | Data to write. The maximum length is 1024 bytes. | | data | string | Yes| Data to write. The maximum length is 1024 bytes.|
- Return value - Return value
| **Type** | **Description** | | **Type**| **Description**|
| -------- | -------- | | -------- | -------- |
| Promise&lt;void&gt; | Promise used to return the result. This method returns no value. | | Promise&lt;void&gt; | Promise used to return the result. This method returns no value.|
- Example - Example
``` ```
...@@ -127,7 +129,7 @@ Writes data to this active tag. This method uses a promise to return the result. ...@@ -127,7 +129,7 @@ Writes data to this active tag. This method uses a promise to return the result.
## connectedTag.writeNdefTag ## connectedTag.writeNdefTag
writeNdefTag(data: string, callback: AsyncCallback&lt;string&gt;): void writeNdefTag(data: string, callback: AsyncCallback&lt;void&gt;): void
Writes data to this active tag. This method uses an asynchronous callback to return the result. Writes data to this active tag. This method uses an asynchronous callback to return the result.
...@@ -136,10 +138,10 @@ Writes data to this active tag. This method uses an asynchronous callback to ret ...@@ -136,10 +138,10 @@ Writes data to this active tag. This method uses an asynchronous callback to ret
**System capability**: SystemCapability.Communication.ConnectedTag **System capability**: SystemCapability.Communication.ConnectedTag
- Parameters - Parameters
| **Name** | **Type** | **Mandatory** | **Description** | | **Name**| **Type**| **Mandatory**| **Description**|
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| data | string | Yes | Data to write. The maximum length is 1024 bytes. | | data | string | Yes| Data to write. The maximum length is 1024 bytes.|
| callback | AsyncCallback&lt;string&gt; | Yes | Callback invoked to return the operation result. | | callback | AsyncCallback&lt;string&gt; | Yes| Callback invoked to return the active tag content obtained.|
- Example - Example
``` ```
...@@ -151,7 +153,7 @@ Writes data to this active tag. This method uses an asynchronous callback to ret ...@@ -151,7 +153,7 @@ Writes data to this active tag. This method uses an asynchronous callback to ret
console.error(`failed to write event because ${err.code}`); console.error(`failed to write event because ${err.code}`);
return; return;
} }
// Data is written to the tag. // Data is written to the tag.
console.log(`success to write event: ${value}`); console.log(`success to write event: ${value}`);
}); });
...@@ -168,16 +170,16 @@ Registers the NFC field strength state events. ...@@ -168,16 +170,16 @@ Registers the NFC field strength state events.
**System capability**: SystemCapability.Communication.ConnectedTag **System capability**: SystemCapability.Communication.ConnectedTag
- Parameters - Parameters
| **Name** | **Type** | **Mandatory** | **Description** | | **Name**| **Type**| **Mandatory**| **Description**|
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| type | string | Yes | Event type. The value is **notify**. | | type | string | Yes| Event type. The value is **notify**.|
| callback | Callback&lt;number&gt; | Yes | Callback invoked to return the field strength state. | | callback | Callback&lt;number&gt; | Yes| Callback invoked to return the field strength state.|
- Enumerates the field strength states. - Enumerates the field strength states.
| **Value** | **Description** | | **Value**| **Description**|
| -------- | -------- | | -------- | -------- |
| 0 | Field off. | | 0 | Field off.|
| 1 | Field on. | | 1 | Field on.|
## connectedTag.off('notify') ## connectedTag.off('notify')
...@@ -191,10 +193,10 @@ Unregisters the NFC field strength state events. ...@@ -191,10 +193,10 @@ Unregisters the NFC field strength state events.
**System capability**: SystemCapability.Communication.ConnectedTag **System capability**: SystemCapability.Communication.ConnectedTag
- Parameters - Parameters
| **Name** | **Type** | **Mandatory** | **Description** | | **Name**| **Type**| **Mandatory**| **Description**|
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| type | string | Yes | Event type. The value is **notify**. | | type | string | Yes| Event type. The value is **notify**.|
| callback | Callback&lt;number&gt; | No | Callback used to return the field strength state. If this parameter is not specified, all callbacks associated with the specified event will be unregistered. | | callback | Callback&lt;number&gt; | No| Callback used to return the field strength state. If this parameter is not specified, all callbacks associated with the specified event will be unregistered.|
- Example - Example
``` ```
...@@ -206,10 +208,10 @@ Unregisters the NFC field strength state events. ...@@ -206,10 +208,10 @@ Unregisters the NFC field strength state events.
console.info("nfc rf receive state: " + result); console.info("nfc rf receive state: " + result);
} }
// Register event notification // Register event notification.
connectedTag.on(NFC_RF_NOTIFY, recvNfcRfNotifyFunc); connectedTag.on(NFC_RF_NOTIFY, recvNfcRfNotifyFunc);
// Unregister event notification // Unregister event notification.
connectedTag.off(NFC_RF_NOTIFY, recvNfcRfNotifyFunc); connectedTag.off(NFC_RF_NOTIFY, recvNfcRfNotifyFunc);
``` ```
...@@ -217,7 +219,9 @@ Unregisters the NFC field strength state events. ...@@ -217,7 +219,9 @@ Unregisters the NFC field strength state events.
Enumerates the NFC states. Enumerates the NFC states.
| Name | Default Value | Description | **System capability**: SystemCapability.Communication.ConnectedTag
| -------- | -------- | -------- |
| NFC_RF_LEAVE | 0 | Field off. | | Name| Default Value| Description|
| NFC_RF_ENTER | 1 | Field on. | | -------- | -------- | -------- |
| NFC_RF_LEAVE | 0 | Field on.|
| NFC_RF_ENTER | 1 | Field on.|
en/application-dev/reference/apis/js-apis-nfcController.md
浏览文件 @ aa620b33
# Standard NFC # Standard NFC
Implements Near-Field Communication (NFC). The **nfcController** module implements Near-Field Communication (NFC).
> **NOTE**<br> > **NOTE**<br>
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version. > The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.
## **Modules to Import** ## **Modules to Import**
...@@ -19,6 +19,8 @@ isNfcAvailable(): boolean ...@@ -19,6 +19,8 @@ isNfcAvailable(): boolean
Checks whether NFC is available. Checks whether NFC is available.
**System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
| **Type**| **Description**| | **Type**| **Description**|
...@@ -34,7 +36,7 @@ Opens NFC. ...@@ -34,7 +36,7 @@ Opens NFC.
**Required permissions**: ohos.permission.MANAGE_SECURE_SETTINGS **Required permissions**: ohos.permission.MANAGE_SECURE_SETTINGS
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
...@@ -50,7 +52,7 @@ Closes NFC. ...@@ -50,7 +52,7 @@ Closes NFC.
**Required permissions**: ohos.permission.MANAGE_SECURE_SETTINGS **Required permissions**: ohos.permission.MANAGE_SECURE_SETTINGS
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
...@@ -64,7 +66,7 @@ isNfcOpen(): boolean ...@@ -64,7 +66,7 @@ isNfcOpen(): boolean
Checks whether NFC is open. Checks whether NFC is open.
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
...@@ -78,7 +80,7 @@ getNfcState(): NfcState ...@@ -78,7 +80,7 @@ getNfcState(): NfcState
Obtains the NFC state. Obtains the NFC state.
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
...@@ -92,7 +94,7 @@ on(type: "nfcStateChange", callback: Callback&lt;NfcState&gt;): void ...@@ -92,7 +94,7 @@ on(type: "nfcStateChange", callback: Callback&lt;NfcState&gt;): void
Subscribes to NFC state changes. Subscribes to NFC state changes.
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Parameter** **Parameter**
...@@ -109,7 +111,7 @@ off(type: "nfcStateChange", callback?: Callback&lt;NfcState&gt;): void ...@@ -109,7 +111,7 @@ off(type: "nfcStateChange", callback?: Callback&lt;NfcState&gt;): void
Unsubscribes from the NFC state changes. Unsubscribes from the NFC state changes.
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Parameter** **Parameter**
...@@ -140,6 +142,8 @@ Unsubscribes from the NFC state changes. ...@@ -140,6 +142,8 @@ Unsubscribes from the NFC state changes.
Enumerates the NFC states. Enumerates the NFC states.
**System capability**: SystemCapability.Communication.NFC.Core
| Name| Default Value| Description| | Name| Default Value| Description|
| -------- | -------- | -------- | | -------- | -------- | -------- |
| STATE_OFF | 1 | Off| | STATE_OFF | 1 | Off|
......
en/application-dev/reference/apis/js-apis-nfcTag.md
浏览文件 @ aa620b33
# Standard NFC Tag # Standard NFC Tag
Manages Near-Field Communication (NFC) tags. The **nfcTag** module provides methods for managing Near-Field Communication (NFC) tags.
> **NOTE**<br> > **NOTE**<br>
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version. > The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.
## **Modules to Import** ## **Modules to Import**
``` ```js
import tag from '@ohos.nfc.tag'; import tag from '@ohos.nfc.tag';
``` ```
## tag.getNfcATag ## tag.getNfcATag
getNfcATag(tagInfo: TagInfo): NfcATag getNfcATag(tagInfo: [TagInfo](#taginfo9)): [NfcATag](js-apis-nfctech.md#nfcatag)
Obtains an **NfcATag** object, which allows access to the tags that use the NFC-A technology. Obtains an **NfcATag** object, which allows access to the tags that use the NFC-A technology.
**Required permissions**: ohos.permission.NFC_TAG **Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
| **Type**| **Description**| | **Type**| **Description**|
| -------- | -------- | | -------- | -------- |
| NfcATag | **NfcATag** object obtained.| | [NfcATag](js-apis-nfctech.md#nfcatag) | **NfcATag** object obtained.|
## tag.getNfcBTag ## tag.getNfcBTag
getNfcBTag(tagInfo: TagInfo): NfcBTag getNfcBTag(tagInfo: [TagInfo](#taginfo9)): [NfcBTag](js-apis-nfctech.md#nfcbtag)
Obtains an **NfcBTag** object, which allows access to the tags that use the NFC-B technology. Obtains an **NfcBTag** object, which allows access to the tags that use the NFC-B technology.
**Required permissions**: ohos.permission.NFC_TAG **Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
| **Type**| **Description** | | **Type**| **Description** |
| -------- | ---------------- | | -------- | ---------------- |
| NfcBTag | **NfcBTag** object obtained.| | [NfcBTag](js-apis-nfctech.md#nfcbtag) | **NfcBTag** object obtained.|
## tag.getNfcFTag ## tag.getNfcFTag
getNfcFTag(tagInfo: TagInfo): NfcFTag getNfcFTag(tagInfo: [TagInfo](#taginfo9)): [NfcFTag](js-apis-nfctech.md#nfcftag)
Obtains an **NfcFTag** object, which allows access to the tags that use the NFC-F technology. Obtains an **NfcFTag** object, which allows access to the tags that use the NFC-F technology.
**Required permissions**: ohos.permission.NFC_TAG **Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
| **Type**| **Description** | | **Type**| **Description** |
| -------- | ---------------- | | -------- | ---------------- |
| NfcFTag | **NfcFTag** object obtained.| | [NfcFTag](js-apis-nfctech.md#nfcftag) | **NfcFTag** object obtained.|
## tag.getNfcVTag ## tag.getNfcVTag
getNfcVTag(tagInfo: TagInfo): NfcVTag getNfcVTag(tagInfo: [TagInfo](#taginfo9)): [NfcVTag](js-apis-nfctech.md#nfcvtag)
Obtains an **NfcVTag** object, which allows access to the tags that use the NFC-V technology. Obtains an **NfcVTag** object, which allows access to the tags that use the NFC-V technology.
**Required permissions**: ohos.permission.NFC_TAG **Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC **System capability**: SystemCapability.Communication.NFC.Core
**Return value** **Return value**
| **Type**| **Description** | | **Type**| **Description** |
| -------- | ---------------- | | -------- | ---------------- |
| NfcVTag | **NfcVTag** object obtained.| | [NfcVTag](js-apis-nfctech.md#nfcvtag) | **NfcVTag** object obtained.|
## tag.getIsoDepTag<sup>9+</sup>
getIsoDepTag(tagInfo: [TagInfo](#taginfo9)): [IsoDepTag](js-apis-nfctech.md#isodeptag9 )
Obtains an **IsoDepTag** object, which allows access to the tags that use the ISO-DEP technology.
**Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC.Core
**Return value**
| **Type**| **Description** |
| ---------- | ------------------|
| [IsoDepTag](js-apis-nfctech.md#isodeptag9) | **IsoDepTag** object obtained.|
## tag.getNdefTag<sup>9+</sup>
getNdefTag(tagInfo: [TagInfo](#taginfo9)): [NdefTag](js-apis-nfctech.md#ndeftag9)
Obtains an **NdefTag** object, which allows access to the tags in the NFC Data Exchange Format (NDEF).
**Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC.Core
**Return value**
| **Type**| **Description** |
| ---------| -------------- |
| [NdefTag](js-apis-nfctech.md#ndeftag9) | **NdefTag** object obtained.|
## tag.getMifareClassicTag<sup>9+</sup>
getMifareClassicTag(tagInfo: [TagInfo](#taginfo9)): [MifareClassicTag](js-apis-nfctech.md#mifareclassictag-9)
Obtains a **MifareClassicTag** object, which allows access to the tags that use MIFARE Classic.
**Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC.Core
**Return value**
| **Type**| **Description** |
| ----------------- | ------------------------|
| [MifareClassicTag](js-apis-nfctech.md#mifareclassictag-9) | **MifareClassicTag** object obtained.|
## tag.getMifareUltralightTag<sup>9+</sup>
getMifareUltralightTag(tagInfo: [TagInfo](#taginfo9)): [MifareUltralightTag](js-apis-nfctech.md#mifareultralighttag9)
Obtains a **MifareUltralightTag** object, which allows access to the tags that use MIFARE Ultralight.
**Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC.Core
**Return value**
| **Type**| **Description** |
| -------------------- | ---------------------------|
| [MifareUltralightTag](js-apis-nfctech.md#mifareultralighttag9) | **MifareUltralightTag** object obtained.|
## tag.getNdefFormatableTag<sup>9+</sup>
getNdefFormatableTag(tagInfo: [TagInfo](#taginfo9)): [NdefFormatableTag](js-apis-nfctech.md#ndefformatabletag9)
Obtains an **NdefFormatableTag** object, which allows access to the tags that are NDEF formattable.
**Required permissions**: ohos.permission.NFC_TAG
**System capability**: SystemCapability.Communication.NFC.Core
**Return value**
| **Type**| **Description** |
| ------------------ | --------------------------|
| [NdefFormatableTag](js-apis-nfctech.md#ndefformatabletag) | **NdefFormatableTag** object obtained.|
## TagInfo<sup>9+</sup>
Represents the NFC tag information.
| **Name**| **Type**| **Description**|
| -------- | -------- | -------- |
| uid | string | UID of the tag.|
| technology | number[] | Technology supported by the tag.|
| extrasData | PacMap[] | Additional information about the tag.|
| tagRfDiscId | number | RF discovery ID of the tag.|
| remoteTagService | rpc.RemoteObject | RPC remote object of the tag service.|
| supportedProfiles | number[] | Profiles supported by the tag.|
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