正在检测NSString是否包含...? [英] Detecting if an NSString contains...?

问题描述

如何检测字符串是否包含某个单词?例如，我下面有一个字符串，其内容为:

How can I detect if a string contains a certain word? For example, I have a string below which reads:

@"Here is my string."

我想知道是否可以检测到字符串中的单词，例如"is".

I'd like to know if I can detect a word in the string, such as "is" for example.

推荐答案

这是我的处理方式:

NSString *someString = @"Here is my string";
NSRange isRange = [someString rangeOfString:@"is " options:NSCaseInsensitiveSearch];
if(isRange.location == 0) {
   //found it...
} else {
   NSRange isSpacedRange = [someString rangeOfString:@" is " options:NSCaseInsensitiveSearch];
   if(isSpacedRange.location != NSNotFound) {
      //found it...
   }
}

您可以轻松地将其作为类别添加到NSString:

You can easily add this as a category onto NSString:

@interface NSString (JRStringAdditions) 

- (BOOL)containsString:(NSString *)string;
- (BOOL)containsString:(NSString *)string
               options:(NSStringCompareOptions)options;

@end

@implementation NSString (JRStringAdditions) 

- (BOOL)containsString:(NSString *)string
               options:(NSStringCompareOptions)options {
   NSRange rng = [self rangeOfString:string options:options];
   return rng.location != NSNotFound;
}

- (BOOL)containsString:(NSString *)string {
   return [self containsString:string options:0];
}

@end

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