未验证 提交 32445386 编写于 作者: K king_he 提交者: Gitee

update en/application-dev/reference/apis/js-apis-connectedTag.md.

Signed-off-by: Nking_he <6384784@qq.com>
上级 8fa5632e
# Active Tag # Active Tag
> ![icon-note.gif](public_sys-resources/icon-note.gif)**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 +22,9 @@ Initializes the active tag chip. ...@@ -22,9 +22,9 @@ 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 +38,9 @@ Uninitializes the active tag resources. ...@@ -38,9 +38,9 @@ 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
...@@ -54,9 +54,9 @@ Reads the content of this active tag. This method uses a promise to return the r ...@@ -54,9 +54,9 @@ 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
``` ```
...@@ -78,9 +78,9 @@ Reads the content of this active tag. This method uses an asynchronous callback ...@@ -78,9 +78,9 @@ 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 +102,14 @@ Writes data to this active tag. This method uses a promise to return the result. ...@@ -102,14 +102,14 @@ 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
``` ```
...@@ -136,10 +136,10 @@ Writes data to this active tag. This method uses an asynchronous callback to ret ...@@ -136,10 +136,10 @@ 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 operation result. |
- Example - Example
``` ```
...@@ -168,13 +168,13 @@ Registers the NFC field strength state events. ...@@ -168,13 +168,13 @@ 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. |
...@@ -191,10 +191,10 @@ Unregisters the NFC field strength state events. ...@@ -191,10 +191,10 @@ 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 +206,10 @@ Unregisters the NFC field strength state events. ...@@ -206,10 +206,10 @@ Unregisters the NFC field strength state events.
console.info("nfc rf receive state: " + result); console.info("nfc rf receive state: " + result);
} }
// Register event // Register event notification
connectedTag.on(NFC_RF_NOTIFY, recvNfcRfNotifyFunc); connectedTag.on(NFC_RF_NOTIFY, recvNfcRfNotifyFunc);
// Unregister event // Unregister event notification
connectedTag.off(NFC_RF_NOTIFY, recvNfcRfNotifyFunc); connectedTag.off(NFC_RF_NOTIFY, recvNfcRfNotifyFunc);
``` ```
...@@ -217,7 +217,7 @@ Unregisters the NFC field strength state events. ...@@ -217,7 +217,7 @@ Unregisters the NFC field strength state events.
Enumerates the NFC states. Enumerates the NFC states.
| Name| Default Value| Description| | Name | Default Value | Description |
| -------- | -------- | -------- | | -------- | -------- | -------- |
| NFC_RF_LEAVE | 0 | Field off. | | NFC_RF_LEAVE | 0 | Field off. |
| NFC_RF_ENTER | 1 | Field on. | | NFC_RF_ENTER | 1 | Field on. |
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