35 lines
1.2 KiB
Swift
35 lines
1.2 KiB
Swift
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// UILabel.swift
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// DouYinSwift5
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//
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// Created by lym on 2020/7/23.
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// Copyright © 2020 lym. All rights reserved.
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//
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import UIKit
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class PaddingLabel: UILabel {
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// 1.定义一个接受间距的属性
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var padding = UIEdgeInsets.zero
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// 2. 返回 label 重新计算过 text 的 rectangle
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override func textRect(forBounds bounds: CGRect, limitedToNumberOfLines numberOfLines: Int) -> CGRect {
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guard text != nil else {
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return super.textRect(forBounds: bounds, limitedToNumberOfLines: numberOfLines)
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}
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let insetRect = bounds.inset(by: padding)
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let textRect = super.textRect(forBounds: insetRect, limitedToNumberOfLines: numberOfLines)
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let invertedInsets = UIEdgeInsets(top: -padding.top,
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left: -padding.left,
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bottom: -padding.bottom,
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right: -padding.right)
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return textRect.inset(by: invertedInsets)
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}
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// 3. 绘制文本时，对当前 rectangle 添加间距
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override func drawText(in rect: CGRect) {
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super.drawText(in: rect.inset(by: padding))
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}
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}
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