ios - 在 Swift 中将 UInt32 (UTF-32) 转换为字符串

Question

我有一个 UInt32 的数组值。我想将此数组转换为 String。

这行不通:

let myUInt32Array: [UInt32] = [72, 101, 108, 108, 111, 128049]
let myString = String(myUInt32Array) // error
let myString = String(stringInterpolationSegment: myUInt32Array) // [72, 101, 108, 108, 111, 128049] (not what I want)

这些 SO 帖子显示 UTF8 和 UTF16:

• How can I create a String from UTF8 in Swift?
• Is there a way to create a String from utf16 array in swift?

Answer 1

UnicodeScalar是 UInt32 的类型别名。因此，将您的 UInt32 值转换为 UnicodeScalar，然后将它们附加到 String。

let myUInt32Array: [UInt32] = [72, 101, 108, 108, 111, 128049]

var myString: String = ""

for value in myUInt32Array {
    if let scalar = UnicodeScalar(value) {
        myString.append(Character(scalar))
    }
}

print(myString) // Hello🐱