char 到 ascii - Objective-C [英] char to ascii - Objective-C

问题描述

我想将char数组转换为ascii，

i want to convert char array to ascii,

我开始尝试使用 NSString、characterAtIndex(由于缺乏操作 unichar 的知识而失败)

i started trying with NSString, characterAtIndex ( failed due to lack of knowledge about manipulating unichar )

创建一个字符数组并使用 stringWithCString 将其传递给 NSString(由于缺乏编码知识而失败)

creating a char array and passing it to a NSString using stringWithCString ( failed due to lack of knowledge about encoding )

现在最后我说服自己使用普通的 char 数组并将其类型转换为 int.

now at the end i am convincing myself using normal char array and type casting it into int.

但我认为这不是一个好习惯.

but my mind says this is not a good practice.

请告诉我是否有另一种 Objective-C 类型的解决方案，或者这是唯一的解决方案.

Please tell me is there another Objective-C type solution, or is this the only solution.

我是初学者，正在研究 GNUStep.

I'm a beginner and am working on GNUStep.

推荐答案

NSString 模拟 Unicode 字符串.要获取 C 字符串编码，请使用 -[NSString cStringUsingEncoding:] 返回一个 const char *.您必须提供要使用的编码.对于 ASCII，使用 NSASCIIStringEncoding 常量:

NSString models a Unicode string. To get the C-string encoding, use -[NSString cStringUsingEncoding:] which returns a const char *. You'll have to supply the encoding you want to use. For ASCII, use the NSASCIIStringEncoding constant:

const char *asciiCString = [myString cStringWithEncoding:NSASCIIStringEncoding];

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