- var s="1234567890"
-
- let index = s.startIndex.advancedBy(5) //swift 2.0+
- let index2 = s.endIndex.advancedBy(-6) //swift 2.0+
- var range = Range<String.Index>(start: index2,end: index)
-
- var s1:String=s.substringFromIndex(index)
- var s2:String=s.substringToIndex(index2)
- var s3=s.substringWithRange(range)
-
- print(s1)//67890
- print(s2)//1234
- print(s3)//5
-
- // 扩展String
-
- extension String {
- subscript (r: Range<Int>) -> String {
- get {
- let startIndex = self.startIndex.advancedBy(r.startIndex)
- let endIndex = self.startIndex.advancedBy(r.endIndex)
-
- return self[Range(start: startIndex,end: endIndex)]
- }
- }
- }
-
- var s4 = s[2...4]
- print(s4);//345