Swift在一个角色的第一场比赛中分裂字符串

I'm trying to make an iOS app in Swift that requires me to split a line of text at the first colon (:) of a line. I've tried using the the componentsSeparatedByString method on the string, but in addition to getting an error stating "'NSString' does not have a member named 'componentSeparatedByString'", that method doesn't actually do what I want. I'm trying to make an iOS app in Swift that req