類型別名
Mirror
Mirror.Children
用於表示子結構的類型。
聲明
typealias Children = AnyCollection<Mirror.Child>
詳述
使用反映雙向或隨機訪問集合的鏡像時,您可能會發現 “upgrade” 這種類型的實例對 AnyBidirectionalCollection
或 AnyRandomAccessCollection
很有用。例如,要顯示鏡像的最後 20 個子項(如果它們可以有效訪問),請編寫以下代碼:
if let b = AnyBidirectionalCollection(someMirror.children) {
for element in b.suffix(20) {
print(element)
}
}
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 Mirror.Children。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。