類型方法
from
fromOpaque(_:)
不安全地將不透明的 C 指針轉換為非托管類引用。
聲明
static func fromOpaque(_ value: UnsafeRawPointer) -> Unmanaged<Instance>返回值
對 value 的非托管類引用。
參數
value一個不透明的 C 指針。
詳述
此操作不會更改引用計數。
let str: CFString = Unmanaged.fromOpaque(ptr).takeUnretainedValue()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 Unmanaged fromOpaque(_:)。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。