用于在 UIKit 中测试您的 VoiceOver 支持的快照策略，使用 PointFree 的 SnapshotTesting 库。

此策略使用视图层级的文本表示，仅关注与 VoiceOver 相关的信息。（相关工作：AccessibilitySnapshot 是一种用于类似用例的可视化快照测试工具。）

import SnapshotTesting
import AccessibilityTextSnapshot

assertSnapshot(                     // SnapshotTesting gives you this...
    matching: someView,
    as: .recursiveA11yDescription)  // ... but AccessibilityTextSnapshot gives you this

这会生成所有与 voiceover 相关信息的递归（文本）描述，适用于快照测试。

它不显示 UIImageView，我们也许应该在某个时候重新考虑这一点。

* UIView                                       // non-a11y view but has a11y-relevant descendant
   * UIScrollView                              // (same)
     * UIView                                  // (same)
       * UIStackView                           // ...
         * MDViewLayer.ElementView
           * UIStackView
             * MDViewModels.Label              // | hanging from this view means it has a11y-relevant stuff
             | -label: Relaxation exercises    // a11y property
             | -traits: .staticText            // a11y property
             * UIStackView
               * MDViewLayer.MultilineButton
               | -label: Yes
               | -hint: Unselected option
               | -traits: .button
               * MDViewLayer.MultilineButton
               | -label: No
               | -hint: Unselected option
               | -traits: .button
         * MDViewLayer.ConversationListItemView // hanging | means a11y-relevant view
         | -label: Only you. No messages yet    // a11y property
         | -hint: Open conversation             // a11y property
         | * UIStackView                        // subviews that would be a11y-relevant
         |   * UIStackView                      // BUT are not read by VoiceOver because
         |     * UIStackView                    // the parent view overrides, note leading |
         |       * MDViewModels.Label
         |       | -label: Only you
         |     * UIStackView
         |       * MDViewModels.Label
         |       | -label: No messages yet.
         |   * MDViewLayer.Button
         |     * UIView
         |       * MDViewModels.Label
         |       | -label: Ongoing video call
         o MDViewLayer.StepValidationView        // o means isHidden=true (on self or a parent)
         o -label: Please correct the errors above. Actions available
         o -action: Go to first error            // We still show it because we want to
         o * MDViewLayer.MultilineButton         // be reminded that there *could* be something!
         o | -label: Please correct the errors above

辅助功能文本快照

用法

使用 CocoaPods 安装