AnyObserver
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小牛编辑
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2023-12-01
AnyObserver
AnyObserver 可以用来描叙任意一种观察者。
例如:
打印网络请求结果:
URLSession.shared.rx.data(request: URLRequest(url: url))
.subscribe(onNext: { data in
print("Data Task Success with count: \(data.count)")
}, onError: { error in
print("Data Task Error: \(error)")
})
.disposed(by: disposeBag)
可以看作是:
let observer: AnyObserver<Data> = AnyObserver { (event) in
switch event {
case .next(let data):
print("Data Task Success with count: \(data.count)")
case .error(let error):
print("Data Task Error: \(error)")
default:
break
}
}
URLSession.shared.rx.data(request: URLRequest(url: url))
.subscribe(observer)
.disposed(by: disposeBag)
用户名提示语是否隐藏:
usernameValid
.bind(to: usernameValidOutlet.rx.isHidden)
.disposed(by: disposeBag)
可以看作是:
let observer: AnyObserver<Bool> = AnyObserver { [weak self] (event) in
switch event {
case .next(let isHidden):
self?.usernameValidOutlet.isHidden = isHidden
default:
break
}
}
usernameValid
.bind(to: observer)
.disposed(by: disposeBag)
下一节将介绍 Binder 以及 usernameValidOutlet.rx.isHidden
的由来。