macOS How can find a string in NSString?

OMG, are you serious !!!???? WTF. Look in the NSString class reference. Particularly look under Finding Characters and Substrings.

As jiminaus said... the documentation is your friend:
http://developer.apple.com/library/...lasses/NSString_Class/Reference/NSString.html

The appropriate method is rangeOfStringptions: with NSCaseInsensitiveSearch as your option mask.

It sounds like, based on your posts, that you are trying to write a program without having learned the language/frameworks. You might want to start here:
http://developer.apple.com/library/...bjectiveC.html#//apple_ref/doc/uid/TP30001163

http://developer.apple.com/library/...roduction.html#//apple_ref/doc/uid/TP40002974

-Lee

Variable Names

Learner said:

this is correct way

Code:

BOOL match = ([main_str rangeOfString:find_str options:NSCaseInsensitiveSearch].location != NSNotFound);

Click to expand...

I'm assuming "main_str" is an NSString you've created somewhere else. In which case you should make your variable names more useful (and match the Cocoa development guidelines). Something like "nameOfBaby" or "typeOfBuilding".

Also "match" should be "nicknameFoundInNameOfBaby" or "subtypeFoundInTypeOfBuilding" or something like that.

LearnerSixMonthsFromNow will thank Learner.