Hacktoberfest 2026：メンテナが10月に向けて印を付けた、オープンで初心者向けの issue。 Hacktoberfest の issue を見る

iOS selector click taps a point resolved from a pre-tap capture, so a layout shift between capture and tap retargets it silently

クローズ
  • 何か問題がありますか？
#3,354 コメント 0 件 リアクション 0 件 担当者 0 名 GitHub で見る

メンテナーはふだん 1 日以内に返信

@thymikee がすでに取り組んでいます。

2026年10月10日 から。

  • #3376 @thymikee による — オープン

評価

難易度
4/5
見積もり時間
3〜5日
初心者へのやさしさ
25/100
issue の種類
バグ
明瞭さ
おおむね明確
活発さ
停滞
技術スタック
ios, typescript
領域
mobile

調査の方向性

Start with settleAppleOpen in packages/platform-apple/src/open-policy.ts, where the fixed post-open sleep fallback lives, and with the runtime-selector tap path that takes its point from the pre-tap capture. The issue asks you to pick one owning fix, so first settle the design, then update the guarantee cell in packages/contracts/src/interaction-guarantees.ts. Done means a fixture or live run where a moved target either gets tapped at its new location or fails with a typed reason, with warm click timing unchanged. Linked PR #3356 is already open, so check it before starting.

索引モデルが issue の本文から書いたものです。

説明

Purpose

An iOS selector click taps the point it resolved from its own pre-tap snapshot. If the layout moves between that capture and the tap, the tap lands on whatever is now under the old point, and the click still reports success. Nothing re-checks where the target is at dispatch time.

Evidence

Main run 37815426076 (2026-10-08, iOS 26 lane), 01-settings.ad. Times are from the session runner.log:

open            postOpenObservation: unobservable  -> fixed POST_OPEN_SETTLE_MS sleep
17:41:31.77 COMMAND_ACCEPTED  command=snapshot        (click's pre-tap capture)
17:41:34.57 COMMAND_COMPLETED command=snapshot ok=1   (2.80 s capture)
17:41:35.56 SYNTHESIZED_DISPATCH kind=tap point=(201.0,319.0)   attempt 1 -> following wait failed
17:42:10.96 SYNTHESIZED_DISPATCH kind=tap point=(201.0,406.0)   attempt 2 -> passed

General was at y=319 in a capture taken about 0.5 s after open returned. On the settled root list it is at y=406, 87 pt lower. Attempt 1's tap probably hit the Apple Account band.

This alone does not prove the tap missed. In #2936 a failing first attempt tapped the settled (201,406) and its wait still failed, so a stale point is one cause among others. Diagnostic history: #2948.

Where it happens

  • settleAppleOpen (packages/platform-apple/src/open-policy.ts): when the bridge can't read the app, the open falls back to a fixed sleep. When the bridge does read it, observable only means the tree was readable, not that the layout is stable.
  • The runtime-selector path takes its tap point from the rect in the pre-tap capture. Neither the offscreen/nonHittable checks nor anything in the runner confirm that the node is still at that point when the tap goes out.

Required behavior

  • Choose one owning fix and justify it against the evidence. Candidates:
    • re-resolve or re-check the target's frame in the runner right before tapping;
    • require the target's frame to be stable across captures before tapping;
    • gate the first post-open interaction on the layout settling.
  • A bounded check must have a budget shorter than the click itself and must not add a capture to warm clicks whose layout is already stable.
  • A target that moved and can't be confirmed must fail with a typed reason, not tap the old point.
  • Update the guarantee cell this changes in packages/contracts/src/interaction-guarantees.ts.

Completion

  • A fixture or live run where the target moves between capture and tap either taps the new location or fails with a typed reason.
  • Warm click p50 on 01-settings.ad (about 2.6 s locally) does not regress.

Related: #3335 (click reports dispatch, not landing), #2948, #2491/#3328 (wait observation stall).

主要言語
TypeScript
スター
4.9k
フォーク
328
平均マージ
12時間 18分
マージ済み PR（30日）
538

環境構築

はじめの一歩

  1. issue を最後まで読み、次にプロジェクトのコントリビューションガイドを読みます。
  2. 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
  3. リポジトリをフォークし、ブランチを切って変更します。
  4. issue 番号を参照したプルリクエストを送ります。

callstack/agent-device のほかの issue

callstack/agent-device の issue をすべて見る

似ている issue

TypeScript の issue をもっと見る

新しい issue をメールで受け取る

初心者向けの GitHub issue を短くまとめたダイジェスト。