blocks|key|981122|text|下面是我会怎么做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981123|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...
+++}
}|code-block|syntax|javascript|981124|您可以轻松地将其作为类别添加到NSString中|offset|length|style|CODE|981125|@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|981126|entityMap^0|0|0|F|8|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Here's how I would do it:

<pre><code>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...
 }
}
</code></pre>

You can easily add this as a category onto <code>NSString</code>:

<pre><code>@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
</code></pre>

blocks|key|981160|text|一个完整的解决方案将首先扫描字符串(没有添加空格)，然后检查紧挨着的前一个字符是空白还是行首。同样，检查紧随其后的字符是否为空或行尾。如果两个测试都通过了，那么你就匹配了。根据您的需要，您还可以检查,、.、()等。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|981161|当然，另一种方法是将字符串解析为单词，然后逐个检查每个单词。|981162|entityMap^0|2R|1|2T|1|2V|2|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|R|8|@]|D|@]|E|$]]]|I|$]]

A complete solution would first scan for the string (without added blanks), then check if the immediately prior character is either blank or beginning of line. Similarly check if the immediately following character is either blank or end of line. If both tests pass then you have a match. Depending on your needs you might also check for <code>,</code>, <code>.</code>, <code>()</code>, etc.

An alternative approach, of course, is to parse the string into words and check each word individually.

blocks|key|1195616|text|我推荐使用NSLinguisticTagger。我们可以用它来搜索Here+is+my+string.+His+isn't+a+mississippi+isthmus.+It+is?|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1195617|NSLinguisticTagger+*linguisticTagger+=+[[NSLinguisticTagger+alloc]+initWithTagSchemes:@[
++++++++++++++++++++++++++++++++++++++++NSLinguisticTagSchemeTokenType,
++++++++++++++++++++++++++++++++++++++++]
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++options:
++++++++++++++++++++++++++++++++++++++++NSLinguisticTaggerOmitPunctuation+%7C
++++++++++++++++++++++++++++++++++++++++NSLinguisticTaggerOmitWhitespace+%7C
++++++++++++++++++++++++++++++++++++++++NSLinguisticTaggerOmitOther+];
[linguisticTagger+setString:@"Here+is+my+string.+His+isn't+a+mississippi+isthmus.+It+is?"];
[linguisticTagger+enumerateTagsInRange:NSMakeRange(0,
+++++++++++++++++++++++++++++++++++++++++++++++++++[[linguisticTagger+string]+length])
++++++++++++++++++++++++++++++++scheme:NSLinguisticTagSchemeTokenType
+++++++++++++++++++++++++++++++options:
+NSLinguisticTaggerOmitPunctuation+%7C
+NSLinguisticTaggerOmitWhitespace+%7C
+NSLinguisticTaggerOmitOther+%7C
+NSLinguisticTaggerJoinNames
++++++++++++++++++++++++++++usingBlock:%5E(NSString+*tag,+NSRange+tokenRange,+NSRange+sentenceRange,+BOOL+*stop)+{
++++++++++++++++++++++++++++++++NSLog(@"tag:+%25@,+tokenRange:+%25@,+sentenceRange:+%25@,+token:+%25@",
++++++++++++++++++++++++++++++++++++++tag,
++++++++++++++++++++++++++++++++++++++NSStringFromRange(tokenRange),
++++++++++++++++++++++++++++++++++++++NSStringFromRange(sentenceRange),
++++++++++++++++++++++++++++++++++++++[[linguisticTagger+string]+substringWithRange:tokenRange]);
++++++++++++++++++++++++++++}];|code-block|syntax|javascript|1195618|这将输出以下内容：|1195619|tag:+Word,+tokenRange:+{0,+4},+sentenceRange:+{0,+19},+token:+Here
tag:+Word,+tokenRange:+{5,+2},+sentenceRange:+{0,+19},+token:+is
tag:+Word,+tokenRange:+{8,+2},+sentenceRange:+{0,+19},+token:+my
tag:+Word,+tokenRange:+{11,+6},+sentenceRange:+{0,+19},+token:+string
tag:+Word,+tokenRange:+{19,+3},+sentenceRange:+{19,+33},+token:+His
tag:+Word,+tokenRange:+{23,+2},+sentenceRange:+{19,+33},+token:+is
tag:+Word,+tokenRange:+{25,+3},+sentenceRange:+{19,+33},+token:+n't
tag:+Word,+tokenRange:+{29,+1},+sentenceRange:+{19,+33},+token:+a
tag:+Word,+tokenRange:+{31,+11},+sentenceRange:+{19,+33},+token:+mississippi
tag:+Word,+tokenRange:+{43,+7},+sentenceRange:+{19,+33},+token:+isthmus
tag:+Word,+tokenRange:+{52,+2},+sentenceRange:+{52,+6},+token:+It
tag:+Word,+tokenRange:+{55,+2},+sentenceRange:+{52,+6},+token:+is|1195620|它忽略His、mississippi和isthmus，甚至识别isn't内部的is。|1195621|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/ios/#documentation/cocoa/reference/NSLinguisticTagger_Class/Reference/Reference.html^0|X|1M|5|I|0|0|0|0|0|3|3|7|B|J|7|V|5|13|2|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1I|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

I recommend using <a href="http://developer.apple.com/library/ios/#documentation/cocoa/reference/NSLinguisticTagger_Class/Reference/Reference.html" rel="nofollow">NSLinguisticTagger</a>. We can use it to search <code>Here is my string. His isn't a mississippi isthmus. It is?</code>

<pre><code>NSLinguisticTagger *linguisticTagger = [[NSLinguisticTagger alloc] initWithTagSchemes:@[
 NSLinguisticTagSchemeTokenType,
 ]
 options:
 NSLinguisticTaggerOmitPunctuation |
 NSLinguisticTaggerOmitWhitespace |
 NSLinguisticTaggerOmitOther ];
[linguisticTagger setString:@"Here is my string. His isn't a mississippi isthmus. It is?"];
[linguisticTagger enumerateTagsInRange:NSMakeRange(0,
 [[linguisticTagger string] length])
 scheme:NSLinguisticTagSchemeTokenType
 options:
 NSLinguisticTaggerOmitPunctuation |
 NSLinguisticTaggerOmitWhitespace |
 NSLinguisticTaggerOmitOther |
 NSLinguisticTaggerJoinNames
 usingBlock:^(NSString *tag, NSRange tokenRange, NSRange sentenceRange, BOOL *stop) {
 NSLog(@"tag: %@, tokenRange: %@, sentenceRange: %@, token: %@",
 tag,
 NSStringFromRange(tokenRange),
 NSStringFromRange(sentenceRange),
 [[linguisticTagger string] substringWithRange:tokenRange]);
 }];
</code></pre>

This outputs:

<pre><code>tag: Word, tokenRange: {0, 4}, sentenceRange: {0, 19}, token: Here
tag: Word, tokenRange: {5, 2}, sentenceRange: {0, 19}, token: is
tag: Word, tokenRange: {8, 2}, sentenceRange: {0, 19}, token: my
tag: Word, tokenRange: {11, 6}, sentenceRange: {0, 19}, token: string
tag: Word, tokenRange: {19, 3}, sentenceRange: {19, 33}, token: His
tag: Word, tokenRange: {23, 2}, sentenceRange: {19, 33}, token: is
tag: Word, tokenRange: {25, 3}, sentenceRange: {19, 33}, token: n't
tag: Word, tokenRange: {29, 1}, sentenceRange: {19, 33}, token: a
tag: Word, tokenRange: {31, 11}, sentenceRange: {19, 33}, token: mississippi
tag: Word, tokenRange: {43, 7}, sentenceRange: {19, 33}, token: isthmus
tag: Word, tokenRange: {52, 2}, sentenceRange: {52, 6}, token: It
tag: Word, tokenRange: {55, 2}, sentenceRange: {52, 6}, token: is
</code></pre>

It ignores <code>His</code> <code>mississippi</code> and <code>isthmus</code> and even identifies <code>is</code> inside of <code>isn't</code>.

blocks|key|1195695|text|使用以下代码扫描句子中的单词。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1195696|NSString+*sentence+=+@"The+quick+brown+fox";
NSString+*word+=+@"quack";
if+([sentence+rangeOfString:word].location+!=+NSNotFound)+{
++++NSLog(@"Yes+it+does+contain+that+word");
}|code-block|syntax|javascript|1195697|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use the following code to scan the word in sentence.

<pre><code>NSString *sentence = @"The quick brown fox";
NSString *word = @"quack";
if ([sentence rangeOfString:word].location != NSNotFound) {
 NSLog(@"Yes it does contain that word");
}
</code></pre>

blocks|key|1195746|text|我希望这对你有帮助..在.m文件中添加这一行，或者创建一个单独的类并集成此代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1195747|@implementation+NSString+(Contains)

-+(BOOL)+containsString:+(NSString*)+substring
{
NSRange+range+=+[self+rangeOfString+:+substring];
BOOL+found+=+(+range.location+!=+NSNotFound+);
return+found;
}++++
@end|code-block|syntax|javascript|1195748|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I hope this helps you,.. add this line at .m file or create a separate class and integrate this code.

<pre><code>@implementation NSString (Contains)

- (BOOL) containsString: (NSString*) substring
{
NSRange range = [self rangeOfString : substring];
BOOL found = ( range.location != NSNotFound );
return found;
} 
@end
</code></pre>

blocks|key|1195826|text|对于iOS+8和Swift，我们可以使用localizedCaseInsensitiveContainsString方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1195827|+let+string:+NSString+=+"Café"
+let+substring:+NSString+=+"É"

+string.localizedCaseInsensitiveContainsString(substring)+//+true|code-block|syntax|javascript|1195828|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

With iOS 8 and Swift, we can use localizedCaseInsensitiveContainsString method 

<pre><code> let string: NSString = "Café"
 let substring: NSString = "É"

 string.localizedCaseInsensitiveContainsString(substring) // true
</code></pre>

blocks|key|1195881|text|在iOS8中，您现在可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1195882|BOOL+containsString+=+[@"Here+is+my+string."+containsString:@"is"];|code-block|syntax|javascript|1195883|这里有一个关于如何将其“改造”为iOS7的有趣帖子：http://petersteinberger.com/blog/2014/retrofitting-containsstring-on-ios-7/|offset|length|1195884|entityMap|0|LINK|mutability|MUTABLE|url|http://petersteinberger.com/blog/2014/retrofitting-containsstring-on-ios-7/^0|0|0|Q|23|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

In iOS8 you can now use:

<pre><code>BOOL containsString = [@"Here is my string." containsString:@"is"];
</code></pre>

There's an interesting post on how to "retrofit" it to iOS7 here:
<a href="http://petersteinberger.com/blog/2014/retrofitting-containsstring-on-ios-7/" rel="noreferrer">http://petersteinberger.com/blog/2014/retrofitting-containsstring-on-ios-7/</a>

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

<pre><code>@"Here is my string."
</code></pre>

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

Detecting if an NSString contains...?

Swift

如何检测字符串是否包含某个单词？例如，我在下面有一个字符串，内容是：@"Here is my string."我想知道我是否能在字符串中检测到一个单词，例如"is“。

问正在检测NSString是否包含...？
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