I am trying to get first char from String. It should be easy but I can't do in Swift 2.0 (with Xcode beta 6).
Get nth character of a string in Swift programming language
I have tried that method also. It use extension but I can't retrieve using that method. May I know how to do?
Two solutions without casting to NSString
let string = "Hello"
let firstChar1 = string.substringToIndex(string.startIndex.successor())
let firstChar2 = string.characters.first
Update for Swift 2:
Since Swift 2 returns Character rather than String a new String must be created.
let firstChar2 = String(string.characters.first!)
Update for Swift 3:
successor() has been replaced with index(after:..)
let firstChar1 = string.substring(to:string.index(after: string.startIndex))
For what it's worth (and for people searching for and finding this topic), without casting the String to NSString, you need to do the following with Swift 2.1:
let myString = "Example String"
let mySubString = myString.substringWithRange(Range<String.Index>(start: myString.startIndex.advanceBy(0), end: myString.startIndex.advanceBy(4)))
print(mySubString) //'Exam'
This would printout "Exam". Must say that it's much more verbose than in Obj-C. And that's saying something... ;-) But it gets the job done and without casting to NSString.
Try this
let myString = "My String" as NSString
myString.substringWithRange(NSRange(location: 0, length: 3))
In Swift 2 a String is not a collection of anything. According to the documentation:
/// `String` is not itself a collection of anything. Instead, it has
/// properties that present the string's contents as meaningful
/// collections:
///
/// - `characters`: a collection of `Character` ([extended grapheme
/// cluster](http://www.unicode.org/glossary/#extended_grapheme_cluster))
/// elements, a unit of text that is meaningful to most humans.
///
/// - `unicodeScalars`: a collection of `UnicodeScalar` ([Unicode
/// scalar
/// values](http://www.unicode.org/glossary/#unicode_scalar_value))
/// the 21-bit codes that are the basic unit of Unicode. These
/// values are equivalent to UTF-32 code units.
///
/// - `utf16`: a collection of `UTF16.CodeUnit`, the 16-bit
/// elements of the string's UTF-16 encoding.
///
/// - `utf8`: a collection of `UTF8.CodeUnit`, the 8-bit
/// elements of the string's UTF-8 encoding.
Assuming you want to find the second character,
var str = "Hello, playground"
let chars = str.characters
let n = 2
let c = str.characters[str.characters.startIndex.advancedBy(n)]
var mySuperCoolString = "Hello, World!!!!!!!!1!!";
println(mySuperCoolString.substringWithRange(Range<String.Index>(start: advance(mySuperCoolString.startIndex, 0), end: advance(mySuperCoolString.startIndex, 1))));
This should print out H
Swift 2.2 and Swift 3.0
let string = "12134"
string.substringWithRange(string.startIndex..<string.startIndex.advancedBy(2))
