iOS 4 is the final version of iOS that features the iPod app for music and videos on iPhones and iPads. Starting with iOS 5, iPhones and iPads do not have the iPod app, but instead have the …

iOS 4 是 美国 蘋果公司 旗下 行動作業系統 iOS 的第四個主要版本，取代前代作業系統 iPhone OS 3。 iOS 4於2010年6月的 WWDC 大會中首次公布，並於同年6月21日正式推出。

iOS 4是苹果公司在2010年6月22日发布的操作系统。 iOS 4提供包括多任务在内的100项新功能，除了可以一次性运行多款应用外，该系统还允许用户通过文件夹来整理应用。

Apple announced iOS 4 in April 2010, [43] and released it to the public on June 21, 2010, alongside the iPhone 4. [44] It was the first version of the operating system to be called "iOS", …

2010年6月21日 · iOS 4 is available for download by iPhone 3GS and 3G users, as well as by second- and third-generation iPod touch users. The new OS will also be included with the …

2025年3月16日 · iOS 4 (codenamed Apex) is the fourth version of iOS that was released on 21 June 2010. It was first announced at the Apple Special Event on 8 April 2010. It is the first iOS …

2010年6月30日 · iOS 4（之前被称为 iPhone OS 4）是苹果移动操作系统的一次主要升级，带来了许多重要的改变——引入了“多任务”，对第三方开发者开放了数千个 API——其它改进主要是 …

iOS 4 (codenamed "Apex") was the 4th major release of iOS designed and developed by Apple for the iPhone, iPod touch and iPad, being the successor to iPhone OS 3

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

iPhone 3GS以及较新 (2009年发行)的iPod Touches都能够升级到iOS 4.0了。 什么?您只拥有一款iPhone 3G 或是第一代iPhone?您真是太out了,出去外面见见阳光吧,年青 ...