两个字符串的比较失败 [英] comparison of two strings fails

问题描述

我比较两个明显相同的字符串。不幸的是，我的if子句不能按预期工作：

  NSLog（@％@ ==％@？，strippedString1， strippedString2）; 
 
 if（strippedString1 = strippedString2）{
 [_newBuild setTextColor：[NSColor greenColor]]; 
 [_OldBuild setTextColor：[NSColor greenColor]]; 
} 
  

这是我的NSLog输出：Build：2A12-046 == Build：2A12

即使逐个字节比较，两个字符串都是相同的：

解决方案

<用 == 比较指针地址，比较您可以使用的字符串的内容：

  [strippedString1 isEqualToString：strippedString2]; 
  

I make a comparison of two strings which are obviously identical. Unfortunately my if clause doesn´t work as expected:

NSLog(@"%@ == %@ ?",strippedString1,strippedString2);

if (strippedString1 == strippedString2) {
    [_newBuild setTextColor: [NSColor greenColor] ]; 
    [_OldBuild setTextColor: [NSColor greenColor] ]; 
}

This is my NSLog output: Build: 2A12-046 == Build: 2A12

Even a byte by byte comparison says both strings are identical:

Any clues ?

解决方案

With == you are comparing pointer address, to compare the contents of the strings you could use:

 [strippedString1 isEqualToString: strippedString2];

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