70 lines
2.8 KiB
Swift
70 lines
2.8 KiB
Swift
//
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// Copyright (c) 2018 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import RxSwift
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import RxCocoa
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public typealias ScrollViewHolderView = UIView & ScrollViewHolder
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/// Base controller configurable with view model and ScrollViewHolder custom view.
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open class BaseScrollContentController<ViewModel, View: ScrollViewHolderView>: BaseCustomViewController<ViewModel, View> {
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private var bottomInsetDisposable: Disposable?
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/// Bind given driver to bottom inset of scroll view. Takes into account default bottom insets.
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///
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/// - Parameter bottomInsetDriver: Driver that emits CGFloat bottom inset changes.
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public func bindBottomInsetBinding(from bottomInsetDriver: Driver<CGFloat>) {
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let contentInsetObservable = customView.scrollView.rx
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.observe(UIEdgeInsets.self, #keyPath(UIScrollView.contentInset))
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let bottomInset = contentInsetObservable.map { $0?.bottom ?? 0 }
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bottomInsetDisposable = bottomInsetDriver.asObservable()
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.withLatestFrom(bottomInset) { $0 + $1 }
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.bind(to: customView.scrollView.rx.bottomInsetBinder)
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}
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/// Unbind scroll view from previous binding.
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public func unbindBottomInsetBinding() {
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bottomInsetDisposable?.dispose()
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}
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/// Contained UIScrollView instance.
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public var scrollView: UIScrollView {
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return customView.scrollView
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}
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}
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public extension BaseScrollContentController {
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/// On iOS, tvOS 11+ sets contentInsetAdjustmentBehavior to .never.
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/// On earlier versions sets automaticallyAdjustsScrollViewInsets to false.
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func disableAdjustsScrollViewInsets() {
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if #available(iOS 11.0, tvOS 11.0, *) {
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customView.scrollView.contentInsetAdjustmentBehavior = .never
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} else {
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automaticallyAdjustsScrollViewInsets = false
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}
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}
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}
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