有没有办法可以使用 SwiftUI 将文本限制为 2 / 3 行？

Posted 2023-02-24

【中文标题】有没有办法可以使用 SwiftUI 将文本限制为 2 / 3 行？

【英文标题】：Is there a way that I can limit the text to 2 / 3 lines using SwiftUI?

【发布时间】：2019-06-06 10:33:21

【问题描述】：

我正在尝试使用

var body: some View 
    Text("This is large text. Is there a way that I can unwrap the large text as discussed").lineLimit(2)

仅供参考： 我知道

var body: some View 
    Text("This is large text. Is there a way that I can unwrap the large text as discussed").lineLimit(nil)

它将文本换行成 n 行。

【参考方案1】：

在Text 元素上调用.lineLimit(3)。 （从技术上讲，它可以在 any View 上调用，在这种情况下，它将限制该视图中 all Text 元素的行数。）

来自SwiftUI.View：

    /// Sets the maximum number of lines that text can occupy in this view.
    ///
    /// The line limit applies to all `Text` instances within this view. For
    /// example, an `HStack` with multiple pieces of text longer than three
    /// lines caps each piece of text to three lines rather than capping the
    /// total number of lines across the `HStack`.
    ///
    /// - Parameter number: The line limit. If `nil`, no line limit applies.
    /// - Returns: A view that limits the number of lines that `Text` instances
    ///   display.
    public func lineLimit(_ number: Int?) -> Self.Modified<_EnvironmentKeyWritingModifier<Int?>>

【参考方案2】：

因为.linelimit 暂时没有按预期工作，如果您有多个文本（如标题和副标题），您可以简单地将 Text 元素包装在 VStack 中或者您可以将.multilineTextAlignment(.center) 修饰符直接添加到文本元素：

 VStack
        Text("This is large text. Is there a way that I can unwrap the large text as discussed")
        .font(.title3)
        .foregroundColor(.white)
                             
        .padding()
         .multilineTextAlignment(.center)