Case insensitive comparison NSString

Question

Hi,

Can anyone point me to any resources about case insensitive comparison in Objective C? It doesn't seem to have an equivalent method to str1.equalsIgnoreCase(str2)

Thanks,
Teja

Answer 1

- (NSComparisonResult)caseInsensitiveCompare:(NSString *)aString

Answer 2

if( [@"Some String" caseInsensitiveCompare:@"some string"] == NSOrderedSame ) {
  // strings are equal except for possibly case
}

The documentation is located at http://developer.apple.com/iphone/library/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html#//apple_ref/doc/uid/20000154-caseInsensitiveCompare_

Answer 3

Try this method - (NSComparisonResult)caseInsensitiveCompare:(NSString *)aString

Answer 4

An alternative if you want more control than just case insensitivity is:

[someString compare:otherString options:NSCaseInsensitiveSearch];

Numeric search and diacritical insensitivity are two handy options.