如何在Objective-C中将HEX转换为NSString？ [英] How to convert HEX to NSString in Objective-C?

问题描述

我有一个带有十六进制字符串的NSString，如68656C6C6F，意思是你好。

I have a NSString with hex string like "68656C6C6F" which means "hello".

现在我想将十六进制字符串转换为另一个显示hello的NSString对象。怎么做？

Now I want to convert the hex string into another NSString object which shows "hello". How to do that ?

推荐答案

我确信有更好，更聪明的方法来做到这一点，但这个解决方案确实有效。

I am sure there are far better, cleverer ways to do this, but this solution does actually work.

NSString * str = @"68656C6C6F";
NSMutableString * newString = [[[NSMutableString alloc] init] autorelease];
int i = 0;
while (i < [str length])
{
    NSString * hexChar = [str substringWithRange: NSMakeRange(i, 2)];
    int value = 0;
    sscanf([hexChar cStringUsingEncoding:NSASCIIStringEncoding], "%x", &value);
    [newString appendFormat:@"%c", (char)value];
    i+=2;
}

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