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38 lines
1.2 KiB
Swift
38 lines
1.2 KiB
Swift
// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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import UIKit
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import SessionUIKit
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public extension UIView {
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func applyScaleAspectFitLayout(subview: UIView, aspectRatio: CGFloat) -> [NSLayoutConstraint] {
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guard subviews.contains(subview) else { return [] }
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// This emulates the behavior of contentMode = .scaleAspectFit using
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// iOS auto layout constraints.
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//
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// This allows ConversationInputToolbar to place the "cancel" button
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// in the upper-right hand corner of the preview content.
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return [
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subview.center(.horizontal, in: self),
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subview.center(.vertical, in: self),
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subview.set(.width, to: .height, of: subview, multiplier: aspectRatio),
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subview.set(.width, lessThanOrEqualTo: .width, of: self),
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subview.set(.height, lessThanOrEqualTo: .height, of: self)
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]
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}
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}
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public extension UIView {
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func setShadow(
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radius: CGFloat = 2.0,
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opacity: Float = 0.66,
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offset: CGSize = .zero,
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color: ThemeValue = .black
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) {
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layer.themeShadowColor = color
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layer.shadowRadius = radius
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layer.shadowOpacity = opacity
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layer.shadowOffset = offset
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}
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}
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