未生成 RxSwift 委托绑定？

Posted 2023-03-10

【中文标题】未生成 RxSwift 委托绑定？

【英文标题】：RxSwift Delegate Binding isn't Generated?

【发布时间】：2020-02-03 07:19:28

【问题描述】：

我正在尝试绑定一个委托，这就是我们所做的

/** Delegate Proxy **/
func castOrThrow<T>(_ resultType: T.Type, _ object:Any) throws -> T 
    guard let returnValue = object as? T else 
        throw RxCocoaError.castingError(object: object, targetType: resultType)
    
    return returnValue

@objc
public protocol TestEventGeneratorDelegate:class 
    @objc optional func asyncEventResult(int:Int)

open class TestEventGenerator 
    public var delegate: TestEventGeneratorDelegate?
    func asyncCall() 
        DispatchQueue.global().asyncAfter(deadline: .now() + .seconds(1))  [weak self] in
            guard let self = self else   return 
            self.delegate?.asyncEventResult!(int: 0)
        
    

extension TestEventGenerator: HasDelegate 
    public typealias Delegate = TestEventGeneratorDelegate

open class RxTestDelegateProxy : DelegateProxy<TestEventGenerator,TestEventGeneratorDelegate>,
                                DelegateProxyType,
                                TestEventGeneratorDelegate 
    public weak private(set) var testGenerator: TestEventGenerator?
    public init(testEventGenerator: ParentObject) 
        self.testGenerator = testEventGenerator
        super.init(parentObject: testEventGenerator, delegateProxy: RxTestDelegateProxy.self)
    
    public static func registerKnownImplementations() 
        self.register  RxTestDelegateProxy(testEventGenerator: $0) 
    

extension Reactive where Base: TestEventGenerator 
    public var delegate: DelegateProxy<TestEventGenerator, TestEventGeneratorDelegate> 
        return RxTestDelegateProxy.proxy(for: base)
    
    public var asyncEventResult: Observable<Int> 
        let source =  delegate.methodInvoked(#selector(TestEventGeneratorDelegate.asyncEventResult(int:)))
        .map  (a) in
            return try castOrThrow(Int.self,a[0])
        
        return source
    

/**  Delegate Proxy **/

然后当我使用它时

let testEventGenerator = TestEventGenerator()
textEventGenerator.rx.asyncEventResult.subscribe.... // subscribe here no rx found? 
testEventGenerator.asyncCall() // call and wait for the observable to return to the delegate 

它没有编译并说没有这样的rx

我必须绑定它，因为编写 API 的人没有使用回调来返回值，而是使用委托。

这是他如何编写代码以及我想如何包装它的示例。

有没有办法绑定需要从 asyncCall() 启动的委托？

所以我可以使用 flatmapLatest 以 promiseLike 的方式链接它？

谢谢告知！

我遵循了这些教程： How to convert Delegate to Observable RxSwift? 和 https://blog.ippon.fr/2018/11/13/rxswift-how-to-make-your-favorite-delegate-based-apis-reactive/

【参考方案1】：

符合 TestEventGenerator:ReactiveCompatible 并且会修复它。