[iOS][watchOS] 位元代碼 (Bitcode)
還沒看到有高人翻譯，所以我暫且稱之為位元代碼 (Bitcode)，看來我被中國化了⋯⋯台灣用語應為位元程式碼！其實在WWDC 2015，Apple只是提到它，並沒有詳細介紹它架構與運作，謎樣地描述什麼是位元代碼 (Bitcode)：
Bitcode is an intermediate representation of a compiled program. Apps you upload to iTunes Connect that contain bitcode will be compiled and linked on the App Store. Including bitcode will allow Apple to re-optimize your app binary in the future without the need to submit a new version of your app to the store.
Xcode hides symbols generated during build time by default, so they are not readable by Apple. Only if you choose to include symbols when uploading your app to iTunes Connect would the symbols be sent to Apple. You must include symbols to receive crash reports from Apple.
Note: For iOS apps, bitcode is the default, but optional. If you provide bitcode, all apps and frameworks in the app bundle need to include bitcode. For watchOS apps, bitcode is required.
如果以圖示來描繪是：
Written
on 2014 年 08 月 24 日