實例方法
reversed()
返回以相反順序呈現集合元素的視圖。
聲明
func reversed() -> ReversedCollection<Self>
詳述
通過調用此reversed()
方法,您可以在不為其元素分配新空間的情況下反轉集合。 ReversedCollection
實例包裝了一個基礎集合,並以相反的順序提供對其元素的訪問。此示例以相反的順序打印字符串的字符:
let word = "Backwards"
for char in word.reversed() {
print(char, terminator: "")
}
// Prints "sdrawkcaB"
如果您需要相同類型的反向集合,您可以使用集合的基於序列或基於集合的初始化程序。例如,要獲取字符串的反轉版本,請反轉其字符並從結果中初始化一個新的 String
實例。
let reversedWord = String(word.reversed())
print(reversedWord)
// Prints "sdrawkcaB"
可用版本
iOS 8.0+, iPadOS 8.0+, macOS 10.10+, Mac Catalyst 13.0+, tvOS 9.0+, watchOS 2.0+
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注:本文由純淨天空篩選整理自apple.com大神的英文原創作品 UnsafeMutableBufferPointer reversed()。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。