实例属性
base
此实例包装的值。
声明
var base: Any { get }
详述
可以使用类型转换运算符之一(as?
、as!
或 as
)将 base
属性转换回其原始类型。
let anyMessage = AnyHashable("Hello world!")
if let unwrappedMessage = anyMessage.base as? String {
print(unwrappedMessage)
}
// Prints "Hello world!"
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:本文由纯净天空筛选整理自apple.com大神的英文原创作品 AnyHashable base。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。