Swift字符串拼接核心之Rang
2021-11-01 本文已影响0人
我一不小心就
var myString = "abcde"
let start = myString.index(myString.startIndex, offsetBy: 1)
let end = myString.index(myString.startIndex, offsetBy: 4)
let myRange = start..<end
myString.substring(with: myRange) // "bcd"
myString = "a😀cde"
let start2 = myString.index(myString.startIndex, offsetBy: 1)
let end2 = myString.index(myString.startIndex, offsetBy: 4)
let myRange2 = start2..<end2
myString.substring(with: myRange2) // "😀cd"
print("-------")
print(myString)
