Created
January 28, 2021 07:38
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| import Foundation | |
| private class Weakbox { | |
| weak var object: NSObjectProtocol? | |
| init(_ object: NSObjectProtocol) { | |
| self.object = object | |
| } | |
| } | |
| class DelegateForwarder: NSObject { | |
| private var delegates = [Selector: Weakbox]() | |
| func setDelegate(delegate: NSObjectProtocol?, for selectors: [Selector]) { | |
| if let delegate = delegate { | |
| selectors.forEach { selector in | |
| self.delegates[selector] = Weakbox(delegate) | |
| } | |
| } else { | |
| selectors.forEach { selector in | |
| self.delegates.removeValue(forKey: selector) | |
| } | |
| } | |
| } | |
| override func responds(to aSelector: Selector!) -> Bool { | |
| return delegates[aSelector]?.object?.responds(to: aSelector) ?? super.responds(to: aSelector) | |
| } | |
| override func forwardingTarget(for aSelector: Selector!) -> Any? { | |
| return delegates[aSelector]?.object ?? super.forwardingTarget(for: aSelector) | |
| } | |
| } |
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