How to check if a string contains another string in Objective-C

In this tutorial, we are going to learn about how to check if a string contains another string or substring in Objective-C

Checking the string contains another

To check if a string contains another string in objective-c, we can use the rangeOfString: instance method where it returns the {NSNotFound, 0} if a ‘searchString’ is not found or empty ("").

Here is an example:

NSString *string = @"how are you";

if ([string rangeOfString:@"you"].location == 0) {
  NSLog(@"string does not contain you");
} else {
  NSLog(@"string contains you!");
}

Output:

string contains you!