WWDC17如期而至，苹果这一次体现了足够的诚意，也展现了其继续改变世界的决心和情怀，在Keynote环节用两个多小时阐述和演示了苹果生态系统软硬件方面的更新，有升级优化，也有创造革新，可谓亮点多多。
苹果一直声称要以技术和情怀改变世界，正如本次主题词:
Technology alone is not enough.
Technology must intersect with the liberal arts and the humanities,
to create new ideas and experiences that push society forward.
This summer we bring together thousands of brilliant minds representing many diverse perspectives,passions, and talents to help us change the world.
仅仅靠技术是不够的。
技术必须与文科和人文相交，创造新的思想和经验，推动社会向前发展。
今年夏天，我们汇集了成千上万的才华横溢的人才，代表着许多不同的观点，激情和才华，以帮助我们改变世界。
那么，快来看看苹果将怎样改变世界吧
硬件方面：发布了包括21.5/27寸iMac/iMac Pro、10.5寸超窄边iPad Pro、7代酷睿的MacBook、A10X处理器的iPad Pro，支持Siri和HomeKit的全新硬件HomePad扬声器等。
软件方面：tvOS细微改进、watchOS 4、macOS High Sierra、iOS 11等。
tvOS
Changes on tvOC
Add Amzon and suppot it’s prime video
tvOS本次没有实质上的更新，仅仅宣布了亚马逊的加入并为其带来了更多优秀的视频。
watchOS
Changes on watchOS
watchOS 4 updates
i. Card View UI
ii. Activity new UI
iii. Great support for workout
iv. Music app added and support background play
watch OS在UI上学习了Google Material UI的Card View,使得iWatch在视觉呈现上更加美观，同时在通知栏UI上有了较大改变。在运动、天气、交通等方面更好地支持户外生活，运动数据呈现更加生动直观。新加入的Music app让用户可以直接在手表上享受音乐，并可支持无线蓝牙。
Features
Screen autorotate
Background navigation
Background audio recording
Single-propress runtime
Full screen
Overlapping layers
Water lock API
Core Bluetooth
以上是watchOS许多细节上的特性。此外，watchOS新加入了万花筒新表盘和玩具总动员表盘。
macOS High Sierra & New Macs
Updates on macOS High Sierra
Safari ( more faster )
World’s most fast desktop browser
Modern JavaScript performance
Intelligent tracking prevention
Safari的更新最显著的是速度，比Chrome快了80%，号称目前最快速的桌面浏览器。
Full-screen split view
Storage space required for mail up to 35% less
邮箱可支持全屏左右分屏操作，可以对着收件内容编辑回复，方便直观；同时，邮件的空间占用减少了35%。
Photo
更好地根据人工智能进行分类，更精准人脸识别，帮助用户科学管理照片。
Data
APFS ( Apple File System )
Advanced architecture
Optimized for morden storage
64-bit data structure
Easily adapted to future storage
Safe and Secure
Crash protection
Safe document saves
Stable snapshots
Native encryption
Ultra Responsive
Instant file and directory cloning
Fast directory sizing
Zero copy snapshots
Parallelized metedata operations
Frequently used items in inode
Sparse file write
文件系统由HFS升级为APFS，提升了易用性和安全性，复制操作显著变快。
Video
H.265( High Efficiency Video Coding ) —up to 40% better compression than H.264
支持更加快速高效的H.265视频编码，压缩速率比H.264快了40%。
Graphics ( All about GPU )
i. Metal 2 updated,up to 10x better draw call throughput
Driver optimizeations
Indirect argument buffers
SIMD group data exchange
Uniform variables
Sampler arrays
Resource heaps
由Metal到Metal 2，性能提高10倍。
ii. Used for machine learning
Metal perfance shaders
Recurrent nature network kernels
Binary convolution
Dilated convolution
L-2 norm pooling
Dilated pooling
加入人工智能，功能更强大。
iii. Metal for external graphics
Thunderbolt 3 enclosure
AMD Redern RX 580
USB-C hub
外部设备支持升级。
iv. VR content creation ( Metal for VR )
VR -optimized display pipeline
Viewport arrays
System trace stereo timelines
GPU quene priorities
Frame debugger stereoscopic
Visualization
可支持VR内容创造。
今天起可在开发者网站下载macOS High Sierra Bate版本
New iMacs
Features
Best Mac displayers ever
500 nits
43% brighter
10-bit dithering
One billion colrs
Faster processors
7th-gen Intel core
“Kaby lake”
Higher base & turbo frequencies
10-bit HEVC decode
更快的数据处理器
Higher memory capacity
Up to 32GB on 21.5-inch
Up to 64GB on 27-inch
更大存储空间
Super fast storage
Fusion drive on all 27-inch
Up to 50% faster SSDs
Up to 2TB
超快存储速度
Comparison
| iMac | Price | Improvement |
| —————– |——-|———————————————–|
|iMac 21.5-inch|$1099|Intl Iris Plus Graphics 640 with 64MB eDRAM & Up to 80% faster graphics|
|iMac Retina 4k 21.5-inch|$1499|Radern Pro 555 & 560 up to 4GB VRAM & Up to 3xfaster graphics|
|iMac Retina 5k 27-inch|$1799|Radern Pro 570,575 & 580 up to 8GB VRAM & Up to 5.5x teraflops
The most powerful Mac ever —iMac Pro
Up to 18-Core Xean Procesor
Up to 22 traflops half precision
Up to 128GB ECC memory
…and so on
工作站级别，性能卓越！
New MacBooks
|MacBook|Price|
|————————-|———|
|MacBook |$1299|
|MacBook Pro |$1299|
|MacBook Pro 13-inch|$1799|
|MacBook Pro 15-inch |$2399|
MacBook没有更新，手上的还可以用。
iOS & HomePod
Tim Cook首先鄙视了一下Android 7安装率
iOS 10: %86
Android 7: %7
大家都知道这不能说明什么问题，Android 7安装率低有其特殊原因，Just for fun。iOS 11 comes,我们主要来看iOS 11有哪些新特性。
Technologies
Message
Redesigned app drawer
Messages in iCloud
Optimized device storage smaller and faster backups iOS & macOS
50% U.S. retailers accpting Apple Pay by end of year send and received money on iMessage
iMessage可储存到iCloud并可备份到iOS设备和macOS设备，年底将有50%的零售商在iMessage支持Apple Pay支付。
Siri
i. 支持更多语言
ii. 支持人工智能
iii. 翻译功能：支持英语与中文、法语、德语、意大利语、西班牙语等互相翻译
iv. Siri Kit can support more
Camera & Photos
H.265 supported
Depth API
Live Photos & Loop Photos & Live Photos倒放
图片变得更有趣了。
Map
新增Do not disturb while driving模式，利用人工智能使用户在驾车模式可打开该模式，防止不必要干扰（如推送、短信、垃圾邮件等），接到短信后可自动发短信回复说明正在驾驶，稍后回复。
Home Kit
Air Play 2
开放Air Play 2 Audio API，开发者可开发相关智能家居功能。
Apple Music
Full access to Apple Music service
Cloud Library access
Users’ for you recommendations
Featured music &charts
Search playlist,stations,,and catalog
更加注重社交和个性化，更智能帮助用户筛选音乐。
App Store —the best platform in the worlld
Trusted and safe place for users great opportunity for all developers
Every single day has new app and new games commend for users
App Store中app和游戏展示更加丰富详细，每日有推荐，值得信任，安全友好。
Machine Learning ( Core ML )
Vision API,learning API
Images recognized per minute
人工智能开放API。
AR ( AR Kit )—the largest AR platform in the world
Fast,stable motion tracking
Plane estimation with basic boundaries
Ambient lighting estimation
Scale extimation
Support for Unity,Unreal,ScenceKit
Xcode app templates
苹果终于祭出AR大招了，会上演示了Demo，非常强大！
Something Special for China
QR code support
SMS fraud extension
Traffic cameras
Shanghainese dictation
English on 10-key Pinyin keyboard
Phone number as Apple ID
苹果又一次在开发者大会上向中国用户示好（毕竟中国用户这么多）。支持了用相机扫二维码、短信诈骗防护、交通摄像机、上海话听写10键拼音键盘和电话号码绑定Apple ID等，诚意满分。
iOS 11 on iPad
Pro motion —120Hz Display refresh rate
Six-Core CPU
Twelve-Core GPU
性能提升。
Deck on iPad
iPad新增Deck，类似于iMac，可呈现与隐藏，方便拖拽与分屏。
Files on iPad
iPad新增文件系统，支持拖来拖去功能，文件操作十分方便，是一个非常强大的文件系统。
HomePod ( $349 )
Reinvent Home Music & Breakthrough Home Speaker
For waht
Rock the house
Spatial awareness
Musicologist
Home assistant
Hardware
7beam-forming tweeter array
Precision acoustic horns
Directional control
Apple designed woofer
Automatic bass equalizetion
Dynamic modeling
Great Home Speaker
HomePod可以有一个非常高大上的中文名：轰趴，具有绝美外观，搭载A8处理器。可支持立体环绕声，也可只朝一个方向发声。可在HomePod中使用Siri，可以直接对它说话，如控制电器、介绍新闻等。具备Anonymous ID，黑白两种颜色。
