I am looking at the latest version of the “App Development with Swift” iBook on
page 122. There’s a code example I’ll paste below.
“Maybe you want to check if one string is somewhere within another string. You
can use the contains(_:) method to return a Boolean value that indicates
whether or not the substring was found.
let greeting = "Hi Rick, my name is Amy."
if greeting.contains("my name is") {
print("Making an introduction")
}”
Excerpt From: Apple Education. “App Development with Swift.” Apple Inc. -
Education, 2017. iBooks.
https://itunes.apple.com/us/book/app-development-with-swift/id1219117996?mt=11
<https://itunes.apple.com/us/book/app-development-with-swift/id1219117996?mt=11>
When I try to run this code, I get the following error:
error: cannot convert value of type 'String' to expected argument type
'String.Element' (aka 'Character')
if greeting.contains("my name is") {
^~~~~~~~~~~~
>From what I can tell, the Swift 4 Strings are once again collections, so the
>contains method will only work with characters.
What can I use to find a substring inside a String in Swift 4?
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