Swift split string at first match of a character

Question

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 meth

Answer 1

Swift 4.2, Swift 5 answer:

let str = "Hello, this is, a,  playground"
let splitStringArray = str.split(separator: ",", maxSplits: 1).map(String.init)

print(splitStringArray) // ["Hello", " this is, a,  playground"]

Answer 2

the first

It's just a typo, not componentSeparatedByString, but componentsSeparatedByString

let stringArray = contents.componentsSeparatedByString("\n")
//                                  ^ 

the second

You can use builtin split function which can specify maxSplit:

let str:NSString = "test:foo:bar"
let result = split(str as String, { $0 == ":" }, maxSplit: 1, allowEmptySlices: true)
// -> ["test", "foo:bar"]

Note that the type of the result is [String]. If you want [NSString], just cast it:

let result:[NSString] = split(string as String, { $0 == ":" }, maxSplit: 1, allowEmptySlices: true)
//        ^^^^^^^^^^^

Answer 3

Swift 2 answer with split function(for Swift 3 use maxSplitS parameter, just add "s"):

let fullString = "A B C"
let splittedStringsArray = fullString.characters.split(" ", maxSplit: 1).map(String.init)
print(splittedStringsArray) // ["A","B C"]