Is there a way to implement the shouldChangeTextIn UITextView's delegate method in RxSwift way? My goal is to limit the text input of the user. I just have this:
self.textView.rx.text
.orEmpty
.scan("") { (previous, new) -> String in
return new.count > 254 ? previous : new
}
.bind(to: self.viewModel.notes)
.disposed(by: self.disposeBag)
This is for data, but I don't know how to prevent the further input after 254 count.
I also found RxTextViewDelegateProxy but I'm not sure too how to use it.
let rxTVDelegateProxy = RxTextViewDelegateProxy(textView: self.textView)
Try this:
textView.rx.text.orEmpty
.scan("") { (previous, new) -> String in
return new.count < 254 ? new : previous ?? String(new.prefix(254))
}
.bind(to: textView.rx.text)
.disposed(by: disposeBag)