Instance Method インスタンスメソッド

writeData:error:

Writes the specified data synchronously to the file handle.

Declaration 宣言 

- (BOOL)writeData:(NSData *)data 
            error:(out NSError * _Nullable *)error;

Parameters パラメータ

data

The data to write to the file handle.

error

When the return value is NO, this provides an NSError indicating why the write operation failed.

Return Value 戻り値

Returns YES when the data is successfullly written to the file handle.

Discussion 議論

If the handle represents a file, writing takes place at the file pointer’s current position. After it writes the data, the method advances the file pointer by the number of bytes written. それがデータを書き出す後、メソッドはファイルポインタを書き出されたバイト数だけ前進させます。 This method provides an error if the file descriptor is closed or isn’t valid, if the handle represents an unconnected pipe or socket endpoint, if there isn’t any free space on the file system, or if any other writing error occurs.

See Also 参照

Related Documentation 関連文書

availableData
The data currently available in the receiver. レシーバにおいて現在利用可能なデータ。
- readDataUpToLength:error:
Reads data synchronously up to the specified number of bytes.
- readDataToEndOfFileAndReturnError:
Reads the available data synchronously up to the end of file or maximum number of bytes.