替换Swift String中的字符？

Question

我有一个包含逗号的字符串。但是，我想用一点代替逗号。不幸的是，这一定是可能的，我无法完成它。我不仅仅是回到.5。不幸的是，逗号也只会删除所有破坏它的东西。

let cijfers = "38,5"
let start = cijfers.startIndex;
let end = cijfers.index(cijfers.startIndex, offsetBy: 3);
let result = cijfers.replacingCharacters(in: start..<end, with: ".")
print(result)

Answer 1

您cijfers.replacingOccurrences没有按照正确的目的使用。尝试这个：

let str = "38,5"
let replaced = str.replacingOccurrences(of: ",", with: ".")
print(replaced)