accessibility

问题 My team produces iOS apps that play video using AVPlayer. We've recently been told that we MUST allow display of closed captions for all videos... but that the closed captions would not be coming as a track within the video files (we already support closed captions that come in this way). Instead, we'll be getting them as a separate text file. I've seen a couple references to including the caption text file in the SMIL, but I've found nothing about how to incorporate this text file into the

问题 My team produces iOS apps that play video using AVPlayer. We've recently been told that we MUST allow display of closed captions for all videos... but that the closed captions would not be coming as a track within the video files (we already support closed captions that come in this way). Instead, we'll be getting them as a separate text file. I've seen a couple references to including the caption text file in the SMIL, but I've found nothing about how to incorporate this text file into the

问题 How do you go about building a complete keyboard-accessible web application? Assuming that this for a controlled deployment environment (for use within an org) where access is restricted (not open to public). Update: Forgot to mention that this is aimed at improving data entry efficiency and is not disability-related. Update 2: Would it make sense to use Flash for the entire application? Considering that the environment is browser based and NOT web-based? 回答1: Well, first of all, you have to

问题 Background I have small project on GitHub in which I am trying to create a section 508 compliant (section508.gov) PDF which has form elements within a complex table structure. The tool recommended to verify these PDFs is at http://www.access-for-all.ch/en/pdf-lab/pdf-accessibility-checker-pac.html and my program’s output PDF does pass most of these checks. I will also know what every field is meant for at runtime, so adding tags to structure elements should not be an issue. The Problem The

问题 I'm trying to give a little more clarity to TTS sentences by indicating emphasis, etc. I'm using the Chrome TTS API, which indicates that it accepts SSML-formatted documents in addition to raw text. After many attempts, and a reading a few comments on the web, it doesn't look like this is actually supported, or possibly that this is up to individual voices for implementation. Does anyone know: Has SSML been abandoned under Chrome? If not, is there any indication whether they expect to support

问题 I have the following xml file. <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <LinearLayout android:id="@+id/linear_layout1" android:layout_width="match_parent" android:layout_height="200dp" android:focusable="true" android:layout_margin="10dp" android:orientation="vertical"> <TextView android:id="@+id/text1" android:layout

问题 iOS 8.x VoiceOver announces dimmed instead of disabled for buttons that have been disabled. Is there a way to programmatically get VoiceOver to say "disabled" instead of "dimmed"? 回答1: There are ways to do what you want, but you absolutely should not use them. The announcement "Dimmed" occurs, when the User Interaction Enabled trait is set to NO . This is the way VoiceOver users are use to on screen, focusable, but disabled elements being announced. Forcing your app to behave in another

问题 When creating HTML5 animations, is there a technique that can be used to "synchronize" the alternate text so that screen-readers reads the given element that appears the moment it appears (or triggered by an event / timeline-driven)? Ideally, something that I could invoke with GSAP (using it as the animation library for my projects). Or could such a thing just make the screen-reader speak and pause repeatedly too often, ending up sounding more frustrating than actually enhancing the

问题 What is the biggest disadvantage to use CSS positioning(From Dreamweaver AP Div) for everything instead Float for fixed width, centered website? if I don't care for Mobile users Small screen users (smaller than 1024 px screen size) But I care for Screen reader user All browser user (including IE6) 回答1: If you don't care about small resolution, it's just a question of flexibility : when you use absolute positionning, you break the flow. So, everything must be exactly sized. For many elements

问题 With VoiceOver enabled a user can use a 3 finger swipe gesture to scroll TableViews. VoiceOver verbally announces to the user a phrase indicating their location on the tableview i.e. the rows that are visible such as "Rows 1 to 4 of 5". I would like to override this verbal prompt and get voiceover to announce something else to the user. 回答1: You can't change only the message. You will have to override accessibilityScroll: and do the scrolling and then post the scroll announcement (at least I