不区分大小写的字符串搜索 - iphone [英] case insensitive string search - iphone
问题描述
我正在寻找一种在Objective-C中的另一个字符串中执行不区分大小写的字符串搜索的方法。我可以找到搜索区分大小写的字符串的方法,并比较不敏感的情况,但不搜索+不区分大小写。
我想要执行的搜索示例: / p>
john在我告诉约翰给我一个很好的搜索算法
< 我认为发布这个问题是一个非常好的想法中的坏IDEA
我更喜欢坚持只有NSStrings 。
NSRange r = [MyString rangeOfString:@Boo选项:NSCaseInsensitiveSearch] ;
如果您经常使用NSString,可以将其封装到类别中的方法中。像这样:
@interface NSString(MyExtensions)
- (NSRange)rangeOfStringNoCase:(NSString *)s;
@end
@implementation NSString(MyExtensions)
- (NSRange)rangeOfStringNoCase:(NSString *)s
{
return [self rangeOfString:s选项:NSCaseInsensitiveSearch];
}
@end
您的代码可能会变得更具可读性。然后,那些不熟悉的人不太可读。
I am looking for a way to perform a case insensitive string search within another string in Objective-C. I could find ways to search case sensitive strings, and to compare insensitive case, but not searching + case insensitive.
Examples of the search that I would like to perform:
"john" within "i told JOHN to find me a good search algorithm"
"bad IDEA" within "I think its a really baD idea to post this question"
I prefer to stick to only NSStrings.
NSRange r = [MyString rangeOfString:@"Boo" options:NSCaseInsensitiveSearch];
Feel free to encapsulate that into a method in a category over NSString, if you do it a lot. Like this:
@interface NSString(MyExtensions)
-(NSRange)rangeOfStringNoCase:(NSString*)s;
@end
@implementation NSString(MyExtensions)
-(NSRange)rangeOfStringNoCase:(NSString*)s
{
return [self rangeOfString:s options:NSCaseInsensitiveSearch];
}
@end
Your code might become more readable with this. Then again, less readable for those unfamiliar.
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