如何字节值转换成int类型的Objective-C [英] how to convert byte value into int in objective-c

问题描述

请告诉我如何字节转换为NSInteger的/ INT在Objective-C在iPhone编程？

Please tell me how to convert bytes to NSInteger/int in objective-c in iPhone programming?

推荐答案

您的问题没有用Objective-C的关系，它只是纯C，它应该被标为C。

Your question is not related with Objective-C, it is just pure c, and it should be tagged "c".

你说的字节是什么意思？
如果你想转换一个字节再presenting整数值INT（或NSInteger的）类型，只要使用=

What do you mean by "Bytes"? If you want convert single byte representing integer value to int (or NSInteger) type, just use "=":

Byte b = 123;
NSInteger x;
x = b;

为字节（同为 unsigned char型 - 1字节的无符号整数）和NSInteger的（同为 INT - 4字节有符号整数）都是简单的整数类型并可以自动转换。你应该阅读更多关于 C数据类型的和转换规则的。
例如的http://www.exforsys.com/tutorials/c-language/c-programming-language-data-types.html

as Byte (the same as unsigned char - 1 byte unsigned integer) and NSInteger (the same as int - 4 bytes signed integer) are both of simple integer types and can be converted automatically. Your should read more about "c data types" and "conversion rules". for example http://www.exforsys.com/tutorials/c-language/c-programming-language-data-types.html

如果要转换多个字节存储一些值为int，然后皈依取决于这些数据结构：每个值多少字节，怎么带符号。

If you want to convert several bytes storing some value to int, then convertion depends on structure of these data: how many bytes per value, signed or unsigned.

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