[英]How can I put each word of a string into an array in Swift?
是否可以將字符串中的每個單詞放入Swift中的數組中?
例如:
var str = "Hello, Playground!"
至:
var arr = ["Hello","Playground"]
謝謝 :)
編輯/更新:
Xcode 10.2•Swift 5或更高版本
我們可以使用集合拆分方法擴展StringProtocol
func split(maxSplits: Int = Int.max, omittingEmptySubsequences: Bool = true, whereSeparator isSeparator: (Character) throws -> Bool) rethrows -> [Self.SubSequence]
將omittingEmptySubsequences
設置為true並將閉包作為謂詞傳遞。 我們還可以利用新的Character
屬性isLetter
來分割字符串。
extension StringProtocol {
var words: [SubSequence] {
return split { !$0.isLetter }
}
}
let sentence = "• Hello, Playground!"
let words = sentence.words // ["Hello", "Playground"]
當字符串中有多個連續的空格時,最后一個解決方案(來自Leo)將在數組中創建空元素。 它還將組合以“ - ”分隔的單詞和處理行尾字符作為單詞。
這個不會:
extension String
{
var wordList: [String]
{
return componentsSeparatedByCharactersInSet(NSCharacterSet.alphanumericCharacterSet().invertedSet).filter({$0 != ""})
}
}
這兩個答案目前都不適用於Swift 4,但以下內容可以涵蓋OP的問題,希望是你的問題。
extension String {
var wordList: [String] {
return components(separatedBy: CharacterSet.alphanumerics.inverted).filter { !$0.isEmpty }
}
}
let string = "Hello, Playground!"
let stringArray = string.wordList
print(stringArray) // ["Hello", "Playground"]
並且使用帶有數字和雙倍空格的較長短語:
let biggerString = "Hello, Playground! This is a very long sentence with 123 and other stuff in it"
let biggerStringArray = biggerString.wordList
print(biggerStringArray)
// ["Hello", "Playground", "This", "is", "a", "very", "long", "sentence", "with", "123", "and", "other", "stuff", "in", "it"]
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