Find one string in another with case insensitive in Objective-C

Question

My question is similar to How do I check if a string contains another string in Objective-C?

How can I check if a string (NSString) contains another smaller string but w

Answer 1

You can use -(NSRange)rangeOfString:(NSString *)aString options:(NSStringCompareOptions)mask; to get a range for a substring, the mask parameter is used to specify case insensitive match.

Example :

NSRange r = [str rangeOfString:@"BLA"
                       options:NSCaseInsensitiveSearch];

As stated in the documentation, the method returns a range like {NSNotFound, 0} when the substring isn't found.

BOOL b = r.location == NSNotFound;

Important this method raises an exception if the string is nil.