How do I check if a string contains another string in Swift

Questions

In Objective-C the code to check for a substring in an NSString is:

NSString *string = @"hello Swift";
NSRange textRange =[string rangeOfString:@"Swift"];
if(textRange.location != NSNotFound)
{
    NSLog(@"exists");
}

But how do I do this in Swift?

Answers

You can do exactly the same call with Swift:

  Swift 3.0+   

var string = "hello Swift"

if string.range(of:"Swift") != nil{ 
    println("exists")
}

// alternative: not case sensitive
if string.lowercased().range(of:"swift") != nil {
    println("exists")
}

  Older Swift   

var string = "hello Swift"

if string.rangeOfString("Swift") != nil{ 
    println("exists")
}

// alternative: not case sensitive
if string.lowercaseString.rangeOfString("swift") != nil {
    println("exists")
}

I hope this is a helpful solution since some people, including me, encountered some strange problems by calling containsString().

PS. Don t forget to import Foundation

Source

License : cc by-sa 3.0

http://stackoverflow.com/questions/24034043/how-do-i-check-if-a-string-contains-another-string-in-swift

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