NoDisposable
类似于telegram中SwiftSignalKit中的EmptyDisposable
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private struct NopDisposable : Disposable {
fileprivate static let noOp: Disposable = NopDisposable()
private init() {
}
/// Does nothing.
public func dispose() {
}
}
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extension Disposables {
/**
Creates a disposable that does nothing on disposal.
*/
static public func create() -> Disposable {
return NopDisposable.noOp
}
}
Disposable见另一篇
注：文中源码来自RxSwift