<FSFileStreamCallback>协议 参考

继承自 <NSObject> .

构造函数
(BOOL)	- flush
	Flush internal buffer 更多...
(unsigned long long)	- getSize
	Get the current stream size, in bytes. 更多...
(NSData *)	- readBlock:size:
	Read a data block from stream. 更多...
(BOOL)	- writeBlock:offset:
	Write a block data into stream. 更多...

详细描述

This class represents a callback object to do file reading and writing. All the pure virtual functions in this class are used as callback functions and should be implemented by user to do file reading and writing in a customized way.

函数文档

flush()

- (BOOL) flush

required

Flush internal buffer

返回

YES means success, while NO means failure.

getSize()

- (unsigned long long) getSize

required

Get the current stream size, in bytes.

返回

Current stream size, in bytes.

readBlock:size:()

- (NSData *) readBlock: (unsigned long long)  offset size: (unsigned long long)  size

required

Read a data block from stream.

参数

[in]	offset	Byte offset from beginning of the stream, the position to read data.
[in]	size	Number of bytes to be read from stream.

返回

A data block read from stream.

writeBlock:offset:()

- (BOOL) writeBlock: (NSData *)  data offset: (unsigned long long)  offset

required

Write a block data into stream.

参数

[in]	data	The block data.
[in]	offset	Byte offset from beginning of the stream, the position to write data.

返回

YES means success, while NO means failure.