如何在 SwiftUI 中为单行文本设置行高? [英] How to set line height for a single line text in SwiftUI?

问题描述

目前，我一直在使用 .lineSpacing(...)，但这只适用于多行文本.

Currently, I have been using .lineSpacing(...), but this only works for multi-line text.

/// Sets the amount of space between lines of text in this view.
///
/// - Parameter lineSpacing: The amount of space between the bottom of one
///   line and the top of the next line.
@inlinable public func lineSpacing(_ lineSpacing: CGFloat) -> some View

这意味着我很难准确地从草图/figma 翻译字体，我需要调整填充以使其正确.下面是一个示例:

What this means is that it's harder for me to translate fonts exactly from sketch/figma, and I need to play around with the padding to get it right. Here is an example that shows this:

VStack {
    // Line spacing is ignored.
    Text("Hello, World!")
        .background(Color.green)
        .lineSpacing(50)

    Spacer()

    // Line spacing is correct.
    Text("Lorem ipsum is placeholder text commonly used in the graphic, print, and publishing industries for previewing layouts and visual mockups.")
        .background(Color.green)
        .lineSpacing(50)
}

推荐答案

基于 Dan Hassan 的回答我给自己做了一个 ViewModifier 来做到这一点，看起来它按预期工作

Based on the answer by Dan Hassan I made myself a ViewModifier to do this, and it looks like it works as intended

import SwiftUI

struct FontWithLineHeight: ViewModifier {
    let font: UIFont
    let lineHeight: CGFloat

    func body(content: Content) -> some View {
        content
            .font(Font(font))
            .lineSpacing(lineHeight - font.lineHeight)
            .padding(.vertical, (lineHeight - font.lineHeight) / 2)
    }
}

extension View {
    func fontWithLineHeight(font: UIFont, lineHeight: CGFloat) -> some View {
        ModifiedContent(content: self, modifier: FontWithLineHeight(font: font, lineHeight: lineHeight))
    }
}

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