71 lines
3.1 KiB
Swift
71 lines
3.1 KiB
Swift
/*
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Copyright 2014 OpenMarket Ltd
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Copyright 2020 Vector Creations Ltd
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 UITableView {
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/// Returns safe area insetted separator inset. Should only be used when custom constraints on custom table view cells are being set according to separator insets.
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@objc var vc_separatorInset: UIEdgeInsets {
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var result = separatorInset
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result.left -= self.safeAreaInsets.left
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result.right -= self.safeAreaInsets.right
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return result
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}
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/// Since UITableView does not manage Auto Layout for header, it'd be appropriate calling this after tableView bounds change
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@objc func vc_relayoutHeaderView() {
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guard let headerView = tableHeaderView else { return }
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let height = ceil(headerView.systemLayoutSizeFitting(CGSize(width: bounds.width, height: 0),
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withHorizontalFittingPriority: .required,
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verticalFittingPriority: .fittingSizeLevel).height)
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// compare heights to avoid infinite loop
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if height != headerView.frame.height {
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var headerFrame = headerView.frame
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headerFrame.size.height = height
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headerView.frame = headerFrame
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tableHeaderView = headerView
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}
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}
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/// Since UITableView does not manage Auto Layout for footer, it'd be appropriate calling this after tableView bounds change
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@objc func vc_relayoutFooterView() {
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guard let footerView = tableFooterView else { return }
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let height = ceil(footerView.systemLayoutSizeFitting(CGSize(width: bounds.width, height: 0),
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withHorizontalFittingPriority: .required,
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verticalFittingPriority: .fittingSizeLevel).height)
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// compare heights to avoid infinite loop
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if height != footerView.frame.height {
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var headerFrame = footerView.frame
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headerFrame.size.height = height
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footerView.frame = headerFrame
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tableFooterView = footerView
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}
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}
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/// Checks a given index path exists in the table view
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/// - Parameter indexPath: index path to check
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/// - Returns: True if table view has the index path, otherwise false
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@objc func vc_hasIndexPath(_ indexPath: IndexPath) -> Bool {
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return numberOfSections > indexPath.section
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&& numberOfRows(inSection: indexPath.section) > indexPath.row
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}
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}
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