比较两个NSStrings [英] Compare two NSStrings

问题描述

在我的应用程序中有一个机制，要求在某一点，两个 NSString s将做同样的事情;因为某种原因，当我比较两者，即使他们是相同的，它仍然不认识到。代码如下：

In my app there is a mechanism that requires that at a certain point two NSStrings will be the same to do something; for some reason when I compare the two, even when they are the same, it still doesn't recognize that. The code is something like this:

NSString * aString = [self someMethodThatGetsAString];

NSString * bString;

BOOL areStringsTheSame = NO;

while (areStringsTheSame != YES) {

       bString = [self someMethodThatTakesNSStringsFromAnArrey];
       if (bString == aString) {
             areStringsTheSame = YES;
       { }

我还插入了一个 NSLog code>，并确保在某一点他们是一样的（就我所知，这是 == 代表...），但仍然没有进入如果更改 BOOL 值。

I even inserted an NSLog() and made sure that at a certain point they were the same (and as far as I know this is what == stands for...), but still it didn't get into the if to change the BOOL value.

有另一种方法来做这个比较吗？

Is there another way to do this comparison? Am I missing something?

推荐答案

您可以使用 isEqualToString：：

if ([bString isEqualToString:aString])

= 比较字符串的引用（地址），而不是字符串的值。

== compares the references (addresses of) the strings, and not the value of the strings.

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