ios - 如何从 ios 中的字符串中查找重音字符？

Question

我需要从字符串中找到重音字符，而不是删除字符。

我尝试使用以下代码但不知道如何识别重音字符？

var str = "Hello, plaAyground"
    var scalars = str.unicodeScalars

    str = "Hello, plåÅyground"
    scalars = str.unicodeScalars
    print(scalars.dropFirst())

Answer 1

您可以创建一个自定义的 CharacterSet，其中包含您需要的所有字符，然后在您的目标字符串中搜索该集合中出现的字符

let str = "Hello, plåÅyground"
let characters = "åÅ" // put all required characters in that string
let characterSet = CharacterSet(charactersIn: characters)
if let _ = str.rangeOfCharacter(from: characterSet) {
     // do stuff here
}

如果要区分大写/小写的出现，请为大写/小写字符创建单独的字符集

let str = "Hello, plåÅyground"
let uppercaseCharacters = "Å"
let lowercaseCharacters = "å"
let uppercaseCharacterSet = CharacterSet(charactersIn: uppercaseCharacters)
let lowercaseCharacterSet = CharacterSet(charactersIn: lowercaseCharacters)
if let _ = str.rangeOfCharacter(from: uppercaseCharacterSet) {
     // uppercase character found
} else if let _ = str.rangeOfCharacter(from: lowercaseCharacterSet) {
    // lowercase character found
}