# AsReaderNFCDeviceDelegate

> **⚠️ Note:**  
> These delegate methods are called back only when the AsReader device is properly connected and the corresponding methods have been called.  
> No callbacks occur if the model is unsupported or not connected.

---

## `nfcReadMultiBlockReceived`

Receives data and status from an NFC tag.  
Called back with the result after executing [`readMultiBlockWithBlockIndex`](./9_AsReaderNFCDevice.md#readmultiblockwithblockindex-count).

```objectivec
- (void)nfcReadMultiBlockReceived:(NSArray *)dataArray statusCode:(SDK4StatusCode)statusCode;
```

### Parameters

```{list-table}
:align: left
:class: list-table

* - Name
  - Type
  - Description
* - `dataArray`
  - NSArray
  - Data read from the NFC tag
* - `statusCode`
  - SDK4StatusCode
  - Status data of the NFC operation (see [`SDK4StatusCode`](../common/enum/12_AsReaderInfoDefine.md#sdk4statuscode)).  
  If the return value is not `SDK4_STS_OK`, `dataArray` will be null.
```

### Return Value

```{list-table}
:align: left
:class: list-table

* - Type
  - Description
* - void
  - None (callback method)
```

### Sample Code

```objectivec
- (void)nfcReadMultiBlockReceived:(NSArray *)dataArray statusCode:(SDK4StatusCode)statusCode{
    // dataArray: Data read from the NFC tag
    // statusCode: Status data of the NFC operation (see section 6.1 SDK4StatusCode for details).
}
```

---

## `nfcWriteSingleBlockStatusCode`

Receives the status of writing to an NFC tag.  
Called back with the result after executing [`writeSingleBlockWithBlockIndex`](./9_AsReaderNFCDevice.md#writesingleblockwithblockindex-writedata-uid).

```objectivec
- (void)nfcWriteSingleBlockStatusCode:(SDK4StatusCode)statusCode;
```

### Parameters

```{list-table}
:align: left
:class: list-table

* - Name
  - Type
  - Description
* - `statusCode`
  - SDK4StatusCode
  - Status data of the NFC operation (see [`SDK4StatusCode`](../common/enum/12_AsReaderInfoDefine.md#sdk4statuscode))
```

### Return Value

```{list-table}
:align: left
:class: list-table

* - Type
  - Description
* - void
  - None (callback method)
```

### Sample Code

```objectivec
- (void)nfcWriteSingleBlockStatusCode:(SDK4StatusCode)statusCode{
    // statusCode: Status data of the NFC operation (see section 6.1 SDK4StatusCode for details).
}
```

---

## `nfcWriteBytesStatusCode`

Receives the status of writing bytes to an NFC tag.  
Called back with the result after executing [`writeBytesWithBlockIndex`](./9_AsReaderNFCDevice.md#writebyteswithblockindex-writedata-uid).

```objectivec
- (void)nfcWriteBytesStatusCode:(SDK4StatusCode)statusCode;
```

### Parameters

```{list-table}
:align: left
:class: list-table

* - Name
  - Type
  - Description
* - `statusCode`
  - SDK4StatusCode
  - Status data of the NFC operation (see [`SDK4StatusCode`](../common/enum/12_AsReaderInfoDefine.md#sdk4statuscode))
```

### Return Value

```{list-table}
:align: left
:class: list-table

* - Type
  - Description
* - void
  - None (callback method)
```

### Sample Code

```objectivec
- (void)nfcWriteBytesStatusCode:(SDK4StatusCode)statusCode{
    // statusCode: Status data of the NFC operation (see section 6.1 SDK4StatusCode for details).
}
```