ios RxSwift 使用 bindTo 将 Variable<String> 绑定到 UILabel 不适用于 Swift 3.0 更新
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RxSwift using bindTo for binding Variable<String> to UILabel not working for Swift 3.0 update
提问by JinglesBunny
I use RxSwiftto bind my viewmodelto UILabeland UITexfield. UITextfieldones have no issues converting to Swift 3, just replacing rx_textwith rx.textworked.
我RxSwift用来绑定我的viewmodeltoUILabel和UITexfield。UITextfield转换为 没有问题Swift 3，只需替换rx_text为rx.text工作。
But not for UILabel. On Swift 2.2, I used:
但不是为了UILabel. 在Swift 2.2，我用过：
self.viewModel.shiftNameText.asObservable().bindTo(self.shiftLabel.rx_text).addDisposableTo(self.disposeBag)
For Swift 3, I'm using RxSwift3.0.0-beta.1 and tried just changing rx_text to rx.text, but it doesn't compile and shows this error "Cannot convert value of type 'AnyObserver<String?>' (aka 'AnyObserver<Optional<String>>') to expected argument type 'Variable<String>".
对于Swift 3，我正在使用RxSwift3.0.0-beta.1 并尝试将 rx_text 更改为rx.text，但它无法编译并显示此错误“无法转换类型的值”AnyObserver<String?>' (aka 'AnyObserver<Optional<String>>') to expected argument type 'Variable<String>".
Does anyone know why and how to make this work? Thanks.
有谁知道为什么以及如何使这项工作？谢谢。
回答by marcusficner
UILabel's rx.textproperty is of type AnyObserver<String?>so you need to map the value to an optional
UILabel的rx.text属性属于类型，AnyObserver<String?>因此您需要将该值映射到可选的
self.viewModel.shiftNameText
.asObservable()
.map { text -> String? in
return Optional(text)
}
.bind(to:self.shiftLabel.rx.text)
.disposed(by:self.disposeBag)
or in short:
或简而言之：
self.viewModel.shiftNameText
.asObservable()
.map { ##代码## }
.bind(to:self.shiftLabel.rx.text)
.disposed(by:self.disposeBag)
See https://github.com/ReactiveX/RxSwift/issues/875for other solutions.
有关其他解决方案，请参阅https://github.com/ReactiveX/RxSwift/issues/875。
