一年一度的苹果全球开发者大会(WWDC)于美国太平洋时间6月8日在旧金山举行。“效率”是本届大会的中心词，一方面是iOS、Mac OS X以及WatchOS 2三大系统带来的史无前例的高效工作，另一方面也是Apple Watch在上市不足两月就发布了重大更新，这种速度也是前所未有的。如果单纯从开发者的角度来说，特别值得兴奋的是Metal语言开源了，从现场雷鸣般的掌声中就能听出大家对它的拥护；而对于普通用户来说，一次看到三大系统同时更新，也是开天辟地头一次。
亮点在此！
三大系统更新：用于手机的iOS、用于电脑的OS X系统功能优化补充，用于手表的Watch OS则大幅更新，手表将不再依赖手机。
Apple Music音乐服务上线。
Apple Pay支付功能加强，但何时进入国内尚无消息。
图解如下！
Apple Inc. unveiled new operating systems for smartphones and computers and a new music streaming service on Monday at an annual event in San Francisco.
With Chief Executive Officer Tim Cook delivering a keynote address, the company kicked off the Worldwide Developer Conference (WWDC) of the year with a series of announcements for software upgrades or improvements.
About the new OS X, for Macintosh computers, Cook said it brings "a whole bunch of new capabilities" to the machine. And the iOS 9, for iPhones and iPads, comes with a new "proactive assistant" system designed to learn users' musical taste and help users coordinate events. In addition, Apple introduced Watch OS2, for Apple Watch.
Operating system, or OS, is software that manages hardware and software resources and provides a platform for more specialized functional applications, or apps.
Some other changes unveiled on Monday include new features for Apple Pay and in Maps navigational app, a new app known as News, and a new service dubbed Apple Music.
At a monthly cost of 10 U.S. dollars, Apple Music will be available for iPhone, iPod Touch and iPad later this month and for devices working on Android operating system in the fall to access music streaming and a 24/7 radio station.
Cook was visibly thrilled to announce that Apple's app store has passed 100 billion downloads.
Apple, headquartered in Cupertino, north California, is the most valued tech company in the world.
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