57 lines
1.7 KiB
Swift
57 lines
1.7 KiB
Swift
//
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// Copyright 2022 New Vector 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 UIKit
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public extension UIFont {
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// MARK: - Convenient methods
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/// Update current font with a SymbolicTraits
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func withTraits(_ traits: UIFontDescriptor.SymbolicTraits) -> UIFont {
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guard let descriptor = fontDescriptor.withSymbolicTraits(traits) else {
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return self
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}
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// Size 0 means keep the size as it is
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return UIFont(descriptor: descriptor, size: 0)
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}
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/// Update current font with a given Weight
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func withWeight(weight: Weight) -> UIFont {
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// Add the font weight to the descriptor
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let weightedFontDescriptor = fontDescriptor.addingAttributes([
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UIFontDescriptor.AttributeName.traits: [
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UIFontDescriptor.TraitKey.weight: weight
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]
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])
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return UIFont(descriptor: weightedFontDescriptor, size: 0)
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}
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// MARK: - Shortcuts
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var bold: UIFont {
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withTraits(.traitBold)
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}
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var semiBold: UIFont {
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withWeight(weight: .semibold)
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}
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var italic: UIFont {
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withTraits(.traitItalic)
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}
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}
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