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(tīng)，和有其他障礙的用戶提供了大量可用特性。幾乎基于UIKit框架的應(yīng)用都能輕而易舉的使用，讓更多的人使用你的應(yīng)用同時(shí)為大家提供同樣有吸引力的體驗(yàn)。
Reduce Transparency? 降低透明度
VoiceOver 語(yǔ)音播報(bào)
Button Shapes 按鈕形狀
Play?開(kāi)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，圖標(biāo)，和界面元素提供代替文本標(biāo)簽。替代的文本標(biāo)簽在界面上不可見(jiàn)，但會(huì)語(yǔ)音提示界面上有什么，讓視覺(jué)缺陷的用戶可以容易導(dǎo)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(yīng)可訪問(wèn)設(shè)置，如果你的應(yīng)用使用UIKit框架實(shí)現(xiàn)用戶界面，文本和界面元素自動(dòng)的采用特定的輔助功能，例如更大字體和粗體文本。你的應(yīng)用應(yīng)該會(huì)適時(shí)的檢查和響應(yīng)輔助功能設(shè)置，如減弱動(dòng)態(tài)效果的選項(xiàng)已啟用， 應(yīng)用實(shí)現(xiàn)定制字體應(yīng)該嘗試匹配系統(tǒng)字體的可訪問(wèn)設(shè)置。
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(cè)試你應(yīng)用的可訪問(wèn)特性。除了文本和動(dòng)效改變，可訪問(wèn)選項(xiàng)能調(diào)節(jié)對(duì)比度，反轉(zhuǎn)顏色，降低透明度等等。啟用這些設(shè)置，為啟用這些特性的用戶觀察你的應(yīng)用看起來(lái)使用起來(lái)怎么樣。
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(tīng)力障礙的用戶以視頻的形式感知口語(yǔ)對(duì)話或其它音頻內(nèi)容。口述影像為視覺(jué)受損的用戶提供重要內(nèi)容的語(yǔ)音描述。
For more information, seeiOS AccessibilityandAccessibility?Programming?Guide for iOS.
更多信息參閱 iOS Accessibility 和 Accessibility Programming Guide for iOS 文章。
