Accessibility 輔助功能

翻譯目錄

iOS offers extensive accessibility features for users with vision loss, hearing loss, and other disabilities. Most UIKit-based apps can be made accessible with very little effort, allowing more people to use your app while providing an equally engaging experience for all.

iOS給弱視，弱聽，和有其他障礙的使用者提供了大量可用特性。幾乎基於UIKit框架的應用都能輕而易舉的使用，讓更多的人使用你的應用同時為大家提供同樣有吸引力的體驗。

Reduce Transparency  降低透明度

VoiceOver 語音播報

Button Shapes 按鈕形狀

Play 開始

Provide alternative text labels for images, icons, and interface elements.Alternative text labels aren’t visible onscreen, but they let VoiceOver audibly describe what's onscreen, making navigation easier for people with visual impairments.

給圖片，圖示，和介面元素提供代替文字標籤。替代的文字標籤在介面上不可見，但會語音提示介面上有什麼，讓視覺缺陷的使用者可以容易導航。

Respond to accessibility preferences.If your app uses UIKit to implement its user interface, text and interface elements automatically adapt to certain accessibility preferences, such as bold and larger text. Your app should also check and respond to accessibility preferences when appropriate, such as when the option to reduce motion is enabled. Apps implementing custom fonts should attempt to match the accessibility behavior of the system fonts.

響應可訪問設定，如果你的應用使用UIKit框架實現使用者介面，文字和介面元素自動的採用特定的輔助功能，例如更大字型和粗體文字。你的應用應該會適時的檢查和響應輔助功能設定，如減弱動態效果的選項已啟用， 應用實現定製字型應該嘗試匹配系統字型的可訪問設定。

Test your app with accessibility features.In addition to text and motion changes, accessibility options can change contrast, invert colors, reduce transparency, and more. Enable these settings and observe how your app will look and behave for people who enable these features.

測試你應用的可訪問特性。除了文字和動效改變，可訪問選項能調節對比度，反轉顏色，降低透明度等等。啟用這些設定，為啟用這些特性的使用者觀察你的應用看起來使用起來怎麼樣。

Include closed captions and audio descriptions.Closed captions allow the deaf and hard-of-hearing to perceive spoken dialogue and other audible content in videos. Audio descriptions provide spoken narration of important video content for the visually impaired.

引入隱藏式字幕和口述影像。隱藏式字幕允許失聰和聽力障礙的使用者以視訊的形式感知口語對話或其它音訊內容。口述影像為視覺受損的使用者提供重要內容的語音描述。

For more information, seeiOS AccessibilityandAccessibility Programming Guide for iOS.

更多資訊參閱 iOS Accessibility 和 Accessibility Programming Guide for iOS 文章。