48 lines
1.8 KiB
Swift
48 lines
1.8 KiB
Swift
//
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// Copyright 2020 Vector Creations Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import Foundation
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extension UIScrollView {
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/// Scroll to the given view, which must be a view in the scrollView.
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/// - Parameters:
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/// - view: The view to scroll
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/// - insets: Insets for the scroll area. Provide negative values for more visible area than the view's frame
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/// - animated: animate the scroll
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@objc func vc_scroll(to view: UIView, with insets: UIEdgeInsets = .zero, animated: Bool = true) {
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// find the view's frame in the scrollView with given insets
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let rect = view.convert(view.frame, to: self).inset(by: insets)
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DispatchQueue.main.async {
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self.scrollRectToVisible(rect, animated: animated)
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}
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}
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/// Scroll to bottom of the receiver.
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/// - Parameter animated: animate the scroll
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@objc func vc_scrollToBottom(animated: Bool = true) {
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guard contentSize.height >= bounds.height else {
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return
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}
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let bottomOffset = CGPoint(x: 0, y: contentSize.height - bounds.height + contentInset.bottom)
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if contentOffset != bottomOffset {
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// scroll only if not already there
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setContentOffset(bottomOffset, animated: animated)
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}
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}
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}
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