Objective-C将十六进制字符串解析为整数 [英] Objective-C parse hex string to integer

问题描述

我想知道如何在Objective-C中解析表示数字的十六进制字符串。例如：


pre> ＃01FFFFAB


应解析为整数：
33554347

任何帮助将不胜感激！

约书亚Weinberg的回答大部分都是正确的，但是当扫描十六进制整数时， 0x 前缀是可选的。如果您的格式为＃01FFFFAB ，您仍然可以使用 NSScanner ，但您可以跳过第一个字符。

 无符号结果= 0; 
 NSScanner * scanner = [NSScanner scannerWithString：@＃01FFFFAB]; 
 
 [scanner setScanLocation：1]; //绕过'＃'字符
 [scanner scanHexInt：& result]; 
  

I would like to know how to parse a hex string, representing a number, in Objective-C. I am willing to use both an objective, or a C-based method, either is fine.

example:

#01FFFFAB

should parse into the integer: 33554347

Any help would be appreciated!

解决方案

Joshua Weinberg's answer is mostly correct, however the 0x prefix is optional when scanning hexadecimal integers. If you have a string in the format #01FFFFAB, you can still use NSScanner, but you can skip the first character.

unsigned result = 0;
NSScanner *scanner = [NSScanner scannerWithString:@"#01FFFFAB"];

[scanner setScanLocation:1]; // bypass '#' character
[scanner scanHexInt:&result];

这篇关于Objective-C将十六进制字符串解析为整数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！