我从MVVM开始,以便从视图中很好地分离逻辑代码。但是我有点担心在点击发出请求的按钮时将与progressHUD相关的代码放在哪里。
以前,我曾经这样做:
//Before
@IBAction func startRequestTapped() {
SVProgressHUD.show()
self.apiClient.requestObservable().subscribe(onError: { (error) in
SVProgressHUD.hide()
}, onCompleted: {
SVProgressHUD.hide()
})
}
但是当我使用mvvm时,我会这样:
//In the viewModel
public var validateButtonDidTap = PublishSubject<Void>()
init() {
validateButtonDidTap.flatMap { (_)
return self.apiClient.requestObservable()
}
}
// In the viewController
viewDidLoad() {
let tap = self.validateButton.rx.tap
tap.bindTo(self.viewModel.validateButtonDidTap)
}
其中,我不知道将ProgressHUD隐藏或显示在何处。
标记答案是正确的,但我将逐步指导您。
假设您要尝试登录。
在您的项目中复制ActivityIndicator.swift文件。
在viewModel
:
//MARK: - Properties
/// The http client
private let apiClient: YourApiClient
/// Clousure when button is tapped
var didTappedButton: () -> Void = {}
/// The user
var user: Observable<User>
/// Is signing process in progress
let signingIn: Observable<Bool> = ActivityIndicator().asObservable()
//MARK: - Initialization
init(client: YourApiClient) {
self.client = client
self.didTappedButton = { [weak self] in
self.user = self.apiClient
.yourSignInRequest()
.trackActivity(self.signingIn)
.observeOn(MainScheduler.instance)
}
}
创建SVProgressHUD的扩展:(我不知道SVProgressHUD库,但是会是这样。请根据需要进行修复)
extension Reactive where Base: SVProgressHUD {
/// Bindable sink for `show()`, `hide()` methods.
public static var isAnimating: UIBindingObserver<Base, Bool> {
return UIBindingObserver(UIElement: self.base) { progressHUD, isVisible in
if isVisible {
progressHUD.show() // or other show methods
} else {
progressHUD.dismiss() // or other hide methods
}
}
}
}
在您的viewController
:
@IBAction func startRequestTapped() {
viewModel.didTappedButton()
}
override func viewDidLoad() {
// ...
viewModel.signingIn
.bindTo(SVProgressHUD.rx.isAnimating)
.addDisposableTo(disposeBag)
}
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