iOS 9 is the ninth major release of the iOS mobile operating system developed by Apple Inc., being the successor to iOS 8. It was announced at the company's Worldwide Developers Conference on June 8, 2015, and was released on September 16, 2015.

2024年12月20日 · iOS 必须要与设备通过苹果服务器进行激活，激活方式可以通过 iTunes，iOS 5.0及以上版本可以通过 iCloud 服务激活，并且自动同步。 iOS 12.4之后的版本更可以通过旧iPhone将资料无线传输到新iPhone。 iOS会依据手机的存储大小分配系统所占用的储存空间。

Tables showing the first and maximum iOS versions for each iPhone, iPad, and iPod touch.

Download current and previous versions of Apple's iOS, iPadOS, macOS, watchOS, tvOS, audioOS and visionOS firmware and receive notifications when new firmwares are released.

2021年7月8日 · 下面教授就带大家走进 iOS 的进化史，看看 iOS 从 1 到 15 都变化了什么！ iOS 1. 让我们先来介绍一下 iOS 1 …… 等等，iOS 1 ？ 其实 iOS 第一代并不叫 iOS 1，它叫 iPhone OS，在 2007 年与第一部 iPhone 一起发布。 从第四代开始，iPhone OS 才正式改名为现在的 iOS。 iPhone OS 1 在应用界面和操作上和现在的系统很像，里面也有了邮件、日历、照片、时钟、文本、Safari、便笺等应用。 但是由于乔布斯认为未来是 web 的，所以并没有推出 App …

iOS 9.3.5 为您的 iPhone 或 iPad 提供了重要的安全性更新，推荐所有用户安装。 有关 Apple 软件更新的安全性内容，请访问此网站： https://support.apple.com/zh-cn/HT201222

Download current and previous versions of Apple's iOS, iPadOS, watchOS, tvOS, audioOS and macOS firmware and receive notifications when new firmwares are released.

2021年9月16日 · 这篇博客详细介绍了iPhone屏幕的高度组成部分，包括屏幕尺寸、statusBar、navigationBar和tabBar等，并提供了它们的具体高度数据，为iOS应用开发者提供参考，确保界面适配和布局的准确性。

iOS 9 (codenamed Monarch) [1] is a version of iOS released on September 16, 2015. iOS 9 added many things to make the operating system better. Some of the things it added were a new News application, updates to the Notes and Map applications, and improvements to Siri and the Spotlight feature. For the iPad, iOS 9 also added a split screen feature.

2019年3月25日 · iOS 9 is the ninth major release of the iOS mobile operating system developed by Apple Inc., serving as the successor to iOS 8 and predecessor to iOS 10. It was announced on June 8th at the 2015 Worldwide Developers Conference, alongside tvOS 9, watchOS 2 and OS X El Capitan. Released on...