空格未从字符串中删除

Question

我正在使用“ trimmingCharacters”从字符串中删除空格，但是空格并未删除。

    let number = "123 456"
    let replaced = number.trimmingCharacters(in: .whitespaces)
     print(username)
     print(replaced)

Answer 1

在replacingOccurrences(of:with:)上使用 String 方法，即

let number = "123 456"
let replaced = number.replacingOccurrences(of: " ", with: "")

print(replaced) //Output: 123456

Answer 2

使用字符串 replacingOccurrences

let number = "123 456"
let replaced = number.replacingOccurrences(of: " ", with: "")
print(replaced)

或

使用过滤器

let removed = number.filter{!$0.isWhitespace}
print(removed)

  

输出123456