-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathwwdc18-notes-what-is-new-in-cocoa-touch.html
More file actions
845 lines (394 loc) · 30.6 KB
/
Copy pathwwdc18-notes-what-is-new-in-cocoa-touch.html
File metadata and controls
845 lines (394 loc) · 30.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
<!doctype html>
<html class="theme-next mist use-motion" lang="zh-Hans">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
<link href="/lib/fancybox/source/jquery.fancybox.css?v=2.1.5" rel="stylesheet" type="text/css" />
<link href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic&subset=latin,latin-ext" rel="stylesheet" type="text/css">
<link href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2" rel="stylesheet" type="text/css" />
<link href="/css/main.css?v=5.1.0" rel="stylesheet" type="text/css" />
<meta name="keywords" content="roczhang" />
<link rel="alternate" href="/atom.xml" title="Roc Zhang's Blog" type="application/atom+xml" />
<link rel="shortcut icon" type="image/x-icon" href="/favicon.ico?v=5.1.0" />
<meta name="description" content="WWDC18 - Session 202 笔记">
<meta property="og:type" content="article">
<meta property="og:title" content="WWDC18 Notes - What's New in Cocoa Touch">
<meta property="og:url" content="http://www.roczhang.com/wwdc18-notes-what-is-new-in-cocoa-touch.html">
<meta property="og:site_name" content="Roc Zhang's Blog">
<meta property="og:description" content="WWDC18 - Session 202 笔记">
<meta property="og:image" content="https://www.roczhang.com/images/wwdc18-notes-what-is-new-in-cocoa-touch/1.png">
<meta property="og:image" content="https://www.roczhang.com/images/wwdc18-notes-what-is-new-in-cocoa-touch/2.png">
<meta property="og:image" content="https://www.roczhang.com/images/wwdc18-notes-what-is-new-in-cocoa-touch/3.png">
<meta property="article:published_time" content="2018-06-11T23:30:13.000Z">
<meta property="article:modified_time" content="2018-11-10T07:02:11.562Z">
<meta property="article:author" content="Roc Zhang">
<meta name="twitter:card" content="summary">
<meta name="twitter:image" content="https://www.roczhang.com/images/wwdc18-notes-what-is-new-in-cocoa-touch/1.png">
<script type="text/javascript" id="hexo.configurations">
var NexT = window.NexT || {};
var CONFIG = {
root: '/',
scheme: 'Mist',
sidebar: {"position":"left","display":"post","offset":12,"offset_float":0,"b2t":false,"scrollpercent":false},
fancybox: true,
motion: true,
duoshuo: {
userId: 'undefined',
author: '博主'
},
algolia: {
applicationID: '',
apiKey: '',
indexName: '',
hits: {"per_page":10},
labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
}
};
</script>
<link rel="canonical" href="http://www.roczhang.com/wwdc18-notes-what-is-new-in-cocoa-touch.html"/>
<title> WWDC18 Notes - What's New in Cocoa Touch | Roc Zhang's Blog </title>
<meta name="generator" content="Hexo 4.2.1"></head>
<body itemscope itemtype="http://schema.org/WebPage" lang="zh-Hans">
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-128981660-1', 'auto');
ga('send', 'pageview');
</script>
<div class="container sidebar-position-left page-post-detail ">
<div class="headband"></div>
<header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
<div class="header-inner"><div class="site-brand-wrapper">
<div class="site-meta ">
<div class="custom-logo-site-title">
<a href="/" class="brand" rel="start">
<span class="logo-line-before"><i></i></span>
<span class="site-title">Roc Zhang's Blog</span>
<span class="logo-line-after"><i></i></span>
</a>
</div>
<h1 class="site-subtitle" itemprop="description"></h1>
</div>
<div class="site-nav-toggle">
<button>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
</button>
</div>
</div>
<nav class="site-nav">
<ul id="menu" class="menu">
<li class="menu-item menu-item-home">
<a href="/" rel="section">
<i class="menu-item-icon fa fa-fw fa-home"></i> <br />
首页
</a>
</li>
<li class="menu-item menu-item-categories">
<a href="/categories" rel="section">
<i class="menu-item-icon fa fa-fw fa-th"></i> <br />
分类
</a>
</li>
<li class="menu-item menu-item-archives">
<a href="/archives" rel="section">
<i class="menu-item-icon fa fa-fw fa-archive"></i> <br />
归档
</a>
</li>
<li class="menu-item menu-item-me">
<a href="/me" rel="section">
<i class="menu-item-icon fa fa-fw fa-user"></i> <br />
关于我
</a>
</li>
</ul>
</nav>
</div>
</header>
<main id="main" class="main">
<div class="main-inner">
<div class="content-wrap">
<div id="content" class="content">
<div id="posts" class="posts-expand">
<article class="post post-type-normal " itemscope itemtype="http://schema.org/Article">
<link itemprop="mainEntityOfPage" href="http://www.roczhang.com/wwdc18-notes-what-is-new-in-cocoa-touch.html">
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="Roc Zhang">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/avatar.png">
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="Roc Zhang's Blog">
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
WWDC18 Notes - What's New in Cocoa Touch
</h2>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">发表于</span>
<time title="创建于" itemprop="dateCreated datePublished" datetime="2018-06-12T07:30:13+08:00">
2018-06-12
</time>
</span>
<span class="post-category" >
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-folder-o"></i>
</span>
<span class="post-meta-item-text">分类于</span>
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/Code/" itemprop="url" rel="index">
<span itemprop="name">Code</span>
</a>
</span>
</span>
<span class="post-comments-count">
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-comment-o"></i>
</span>
<a href="/wwdc18-notes-what-is-new-in-cocoa-touch.html#comments" itemprop="discussionUrl">
<span class="post-comments-count disqus-comment-count"
data-disqus-identifier="wwdc18-notes-what-is-new-in-cocoa-touch.html" itemprop="commentCount"></span>
</a>
</span>
</div>
</header>
<div class="post-body" itemprop="articleBody">
<p><a href="https://developer.apple.com/videos/play/wwdc2018/202/" target="_blank" rel="external">WWDC18 - Session 202</a> 笔记<br><a id="more"></a></p>
<p>在 iOS 12 中，Apple 进一步增强了 Cocoa Touch 框架，着重提高了应用的性能表现，同时也带来了不少新功能。在 What’s New in Cocoa Touch 中，对性能上的最佳实践、安全改进、多尺寸与形状屏幕的适配工具、用于 iMessage Apps 的新 API、Siri Shortcuts 以及 Swift 优化等方面进行了概括介绍。</p>
<h2 id="Framework-Updates"><a href="#Framework-Updates" class="headerlink" title="Framework Updates"></a>Framework Updates</h2><h3 id="Performance"><a href="#Performance" class="headerlink" title="Performance"></a>Performance</h3><p>此 Session 中主要通过 Scrolling、Memory 以及 Auto Layout 三个方面介绍了 iOS 12 中的性能改进。</p>
<h4 id="Scrolling"><a href="#Scrolling" class="headerlink" title="Scrolling"></a>Scrolling</h4><p>首先通过 UITableView 举例，介绍 UIKit 中滑动加载的常见流程：</p>
<ul>
<li>在 <code>UITableViewDataSource</code> <code>cellForRowAt</code> 方法中，重用或新初始一个 cell。</li>
<li>使用模型数据中的内容来填充此 cell 。</li>
<li>系统在 cell 上调用 <code>layoutSubviews</code> 方法，对 cell 中的内容进行布局。</li>
<li>系统在 cell 上调用 <code>draw</code> 方法。</li>
</ul>
<p>以上所有这些事务都必须在一次刷新间隔中完成，才能够保证流畅的滚动不掉帧。在 120 Hz 的 iPad Pro 上，间隔时间更短，所以需要尽可能快速的完成这些工作。在 iOS 10 中，UIKit 引入了 <code>UITableViewDataSourcePrefetching Protocol</code> 预加载，实现 <code>prefetchRowsAt</code> 方法之后，就能够提前在后台进行数据准备工作以提升性能表现，但加载当前 cell与预加载将来要显示的数据会同时发生。而在 iOS 12 中，将预加载工作放在了加载 cell 完成之后进行，如下图所示。<br><img src="https://www.roczhang.com/images/wwdc18-notes-what-is-new-in-cocoa-touch/1.png" alt="Markdown preferences pane"><br>同时，在先前的版本中，从简单开销小的内容滑动到复杂开销大的内容时，由于 CPU 性能调度器进行调度需要时间，因此可能会造成卡顿。而在 iOS 12 中，会更加智能的进行 CPU 调度，由上层 UIKit 通知 CPU 准备调度，预先估算在 deadline 之前需要多少 CPU 性能来满足需求，进一步提升滑动流畅度。这些改进都无需开发者做额外的适配工作即可获得性能提升，但开发者仍应尽可能控制并减少开销时间。 </p>
<h4 id="Memory"><a href="#Memory" class="headerlink" title="Memory"></a>Memory</h4><p>关注内存的原因在于 Memory Is Performance。当应用发出较大的内存请求而处于 Free 状态的内存不够时，系统就需要从其他 App 与系统使用的内存中挪出部分试图满足需求。但腾出其他 App 占用的内存并不代表对自己的 App 没有影响，内核需要做很多工作花费 CPU 时间来准备出需要的内存，因此需要花费时间进行等待。减少内存占用有很多方法，但 iOS 12 中带来了一项新技术 - Automatic Backing Store。根据图像中的信息自动减少色彩位深度以减少内存占用。<br><img src="https://www.roczhang.com/images/wwdc18-notes-what-is-new-in-cocoa-touch/2.png" alt="Markdown preferences pane"><br>在 iOS 12 中，<code>UIView.draw()</code>、<code>UIGraphicsImageRenderer</code>以及<code>UIGraphicsImageRendererFormat.Range</code>会默认启用。在 <a href="https://developer.apple.com/videos/play/wwdc2018/219/" target="_blank" rel="external">Session 219 - Image and Graphics Best Practices</a> 中，Apple 详细介绍了 Automatic Backing Store 的内容。</p>
<h4 id="Auto-Layout"><a href="#Auto-Layout" class="headerlink" title="Auto Layout"></a>Auto Layout</h4><p>在 iOS 12 中，Auto Layout 有了巨大的变化，在默认情况下都会变得更快。在处理较基础的独立同层视图布局约束时，在原先随视图数量计算耗时线性增长的基础上进一步减小了耗时。而在计算相互依赖的同层视图布局约束、嵌套的视图布局约束时，iOS 12 将原先随视图数量计算耗时指数级增长优化至了线性增长。如下图所示：<br><img src="https://www.roczhang.com/images/wwdc18-notes-what-is-new-in-cocoa-touch/3.png" alt="Markdown preferences pane"><br>在 <a href="https://developer.apple.com/videos/play/wwdc2018/220/" target="_blank" rel="external">Session 220 - High Performance Auto Layout</a> 中对此做了更详细的介绍。</p>
<h3 id="Swiftification"><a href="#Swiftification" class="headerlink" title="Swiftification"></a>Swiftification</h3><p>在 Swift 4.2 中，让 UIKit 进一步 Swift 化，通过嵌套 Types/Constants/Functions，让 Swift 味更浓，用起来感觉更自然。如下： </p>
<ul>
<li>Nested Constants:<ol>
<li>将 <code>enum UIApplicationState</code> 嵌套至了 <code>class UIApplication</code> 中。</li>
<li>将 <code>enum UITabBarItemPositioning</code> 嵌套至了 <code>class UITabBar</code> 中。</li>
</ol>
</li>
<li>Nested Constants:<ol>
<li>将 <code>NSNotification/Name/didChangeStatusBarOrientation</code>、全局常量 <code>UIApplicationStatusBarOrientationUserInfoKey</code> 移至了 <code>class UIApplication</code> 中。</li>
<li>将 <code>UIFloatRangeZero</code>、<code>UIFloatRangeInfinite</code> 移至了 <code>struct UIFloatRange</code> 中。</li>
</ol>
</li>
<li>Nested Functions:<ol>
<li><code>UIEdgeInsetsInsetRect(originalRect, insets)</code> -> <code>originalRect.insetBy(insets)</code>。</li>
<li><code>UIImagePNGRepresentation(image)</code> -> <code>image.pngData()</code>。</li>
<li>Codable Type 支持: <code>NSStringFrom[CGPoint, CGRect, CGSize, CGVector, CGAffineTransform, UIEdgeInsets, UIOffset] / [CGPoint, CGRect, CGSize, CGVector, CGAffineTransform, UIEdgeInsets, UIOffset]FromString</code> -> <code>JSONEncoder().encode(CGPoint(x: 0, y: 0)) / JSONDecoder().decode(CGPoint.self, from: encoded) / NSCoder.string(for: CGPoint(x: 0, y: 0)) / NSCoder.cgPoint(for: encoded)</code>。</li>
</ol>
</li>
</ul>
<h3 id="NSSecureCoding"><a href="#NSSecureCoding" class="headerlink" title="NSSecureCoding"></a>NSSecureCoding</h3><p>新增默认安全编码与解码，老的 API 现在为 <code>deprecated</code>。<br>关于此部分，详细可见 <a href="https://developer.apple.com/videos/play/wwdc2018/222/" target="_blank" rel="external">Session 222 - Data You Can Trust</a>。</p>
<h2 id="API-Enhancements"><a href="#API-Enhancements" class="headerlink" title="API Enhancements"></a>API Enhancements</h2><h3 id="Notifications"><a href="#Notifications" class="headerlink" title="Notifications"></a>Notifications</h3><p>iOS 12 中对消息通知也做出了较大的改进，主要体现在以下三方面：</p>
<ul>
<li>Interaction<br>自定义的通知界面中，允许添加使用自定义的交互，而不在限定于预先定义的动作。</li>
<li>Grouping<br>分组通知。默认即会使用分组通知，将同一个 App 的通知集合到一个组中。同时也可以设定自己 App 通知消息分组的规则。</li>
<li>Settings<br>在 iOS 12 中，可以在通知页让用户设置是否开启或关闭消息推送。<br>关于通知部分的详情，可见 <a href="https://developer.apple.com/videos/play/wwdc2018/710/" target="_blank" rel="external">Session 710 - What’s New in User Notifications</a> 与 <a href="https://developer.apple.com/videos/play/wwdc2018/711/" target="_blank" rel="external">Session 711 - Using Grouped Notifications</a>。</li>
</ul>
<h3 id="Messages"><a href="#Messages" class="headerlink" title="Messages"></a>Messages</h3><p>在 iOS 12 中，可以将 Message 贴纸置入到 Camera 中。在 Info.plist 中可添加新的 key：<br><figure class="highlight swift"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div></pre></td><td class="code"><pre><div class="line"><key><span class="type">MSSupportedPresentationContexts</span></key></div><div class="line"><array></div><div class="line"><string><span class="type">MSMessagesAppPresentationContextMessages</span></string></div><div class="line"><string><span class="type">MSMessagesAppPresentationContextMedia</span></string></div><div class="line"></array></div></pre></td></tr></table></figure></p>
<h3 id="Automatic-Passwords-and-Security-Code-AutoFill"><a href="#Automatic-Passwords-and-Security-Code-AutoFill" class="headerlink" title="Automatic Passwords and Security Code AutoFill"></a>Automatic Passwords and Security Code AutoFill</h3><p>在 iOS 11 中，引入了自动输入密码功能，可以在 App 内快速输入已在 iCloud Keychain 中存储的密码。在 iOS 12 中，此功能做了进一步的改进，可以在 App 内保存密码到 iCloud Keychain，同时也可以在 App 给使用自动生成强密码功能。并且，如果应用后端对密码的格式有要求，也可以指定这些要求从而保证自动生成的密码符合规则。同时，iOS 12 中也带来了自动从信息中提取验证码，一键输入的功能。<br>关于自动密码与验证码输入详情，可见 <a href="https://developer.apple.com/videos/play/wwdc2018/204/" target="_blank" rel="external">Session 204 - Automatic Strong Passwords and Security Code AutoFill</a>。</p>
<h3 id="Safe-Area"><a href="#Safe-Area" class="headerlink" title="Safe Area"></a>Safe Area</h3><p>通过适配 SafeAreaInsets 来适配不同形状、大小与内容布局格式的界面。主讲人呼吁开发者尽快适配 SafeArea。详细可见 <a href="https://developer.apple.com/videos/play/wwdc2018/235/" target="_blank" rel="external">Session 235 - UIKit: Apps for Every Size and Shape</a>。</p>
<h2 id="Siri-shortcuts"><a href="#Siri-shortcuts" class="headerlink" title="Siri shortcuts"></a>Siri shortcuts</h2><p>Siri shortcuts 是 iOS 12 中带来的新功能。给 App 提供了在 Siri Suggestion 中展示信息、在 Apple Watch Siri 表盘中展示信息，定义出发 Siri shortcuts 语言关键词等能力。可以通过以下 API 来适配 Siri shortcut。</p>
<h3 id="NSUserActivity"><a href="#NSUserActivity" class="headerlink" title="NSUserActivity"></a>NSUserActivity</h3><p>与 Handoff 和 Spotlight 通用的 API。适合要在 App 中打开某些具体内容的情况。为 UserActivity 设置 <code>eligibleForPrediction = true</code>。</p>
<h3 id="Intents"><a href="#Intents" class="headerlink" title="Intents"></a>Intents</h3><p>提供最佳 shortcut 体验需要适配 intents，可以提供无需启动 app 即可运行、提供自定义的语音响应、自定义用户界面、定义预测场景等能力。<br>关于 Siri Shortcut 详情可见 <a href="https://developer.apple.com/videos/play/wwdc2018/211/" target="_blank" rel="external">Session 211 - Introduction to Siri Shortcuts</a> / <a href="https://developer.apple.com/videos/play/wwdc2018/214/" target="_blank" rel="external">Session 214 - Building for Voice with Siri Shortcuts</a> / <a href="https://developer.apple.com/videos/play/wwdc2018/217/" target="_blank" rel="external">Session 217 - Siri Shortcuts on the Siri Watch Face</a></p>
</div>
<div>
</div>
<div>
</div>
<div>
</div>
<footer class="post-footer">
<div class="post-nav">
<div class="post-nav-next post-nav-item">
<a href="/app-architecture-notes-2.html" rel="next" title="App Architecture 笔记 - 2">
<i class="fa fa-chevron-left"></i> App Architecture 笔记 - 2
</a>
</div>
<span class="post-nav-divider"></span>
<div class="post-nav-prev post-nav-item">
<a href="/wwdc18-notes-automatic-strong-passwords.html" rel="prev" title="WWDC18 Notes - Automatic Strong Passwords and Security Code AutoFill">
WWDC18 Notes - Automatic Strong Passwords and Security Code AutoFill <i class="fa fa-chevron-right"></i>
</a>
</div>
</div>
</footer>
</article>
<div class="post-spread">
</div>
</div>
</div>
<div class="comments" id="comments">
<div id="disqus_thread">
<noscript>
Please enable JavaScript to view the
<a href="https://disqus.com/?ref_noscript" target="_blank" rel="noopener">comments powered by Disqus.</a>
</noscript>
</div>
</div>
</div>
<div class="sidebar-toggle">
<div class="sidebar-toggle-line-wrap">
<span class="sidebar-toggle-line sidebar-toggle-line-first"></span>
<span class="sidebar-toggle-line sidebar-toggle-line-middle"></span>
<span class="sidebar-toggle-line sidebar-toggle-line-last"></span>
</div>
</div>
<aside id="sidebar" class="sidebar">
<div class="sidebar-inner">
<ul class="sidebar-nav motion-element">
<li class="sidebar-nav-toc sidebar-nav-active" data-target="post-toc-wrap" >
文章目录
</li>
<li class="sidebar-nav-overview" data-target="site-overview">
站点概览
</li>
</ul>
<section class="site-overview sidebar-panel">
<div class="site-author motion-element" itemprop="author" itemscope itemtype="http://schema.org/Person">
<img class="site-author-image" itemprop="image"
src="/images/avatar.png"
alt="Roc Zhang" />
<p class="site-author-name" itemprop="name">Roc Zhang</p>
<p class="site-description motion-element" itemprop="description"></p>
</div>
<nav class="site-state motion-element">
<div class="site-state-item site-state-posts">
<a href="/archives">
<span class="site-state-item-count">25</span>
<span class="site-state-item-name">日志</span>
</a>
</div>
<div class="site-state-item site-state-categories">
<a href="/categories/index.html">
<span class="site-state-item-count">4</span>
<span class="site-state-item-name">分类</span>
</a>
</div>
<div class="site-state-item site-state-tags">
<span class="site-state-item-count">1</span>
<span class="site-state-item-name">标签</span>
</div>
</nav>
<div class="feed-link motion-element">
<a href="/atom.xml" rel="alternate">
<i class="fa fa-rss"></i>
RSS
</a>
</div>
<div class="links-of-author motion-element">
<span class="links-of-author-item">
<a href="https://github.com/RocZhang9673" target="_blank" title="GitHub">
<i class="fa fa-fw fa-github"></i>
GitHub
</a>
</span>
<span class="links-of-author-item">
<a href="https://twitter.com/roczhang9673" target="_blank" title="Twitter">
<i class="fa fa-fw fa-twitter"></i>
Twitter
</a>
</span>
<span class="links-of-author-item">
<a href="http://weibo.com/u/3210801545" target="_blank" title="Weibo">
<i class="fa fa-fw fa-weibo"></i>
Weibo
</a>
</span>
</div>
</section>
<!--noindex-->
<section class="post-toc-wrap motion-element sidebar-panel sidebar-panel-active">
<div class="post-toc">
<div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-2"><a class="nav-link" href="#Framework-Updates"><span class="nav-number">1.</span> <span class="nav-text">Framework Updates</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#Performance"><span class="nav-number">1.1.</span> <span class="nav-text">Performance</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#Scrolling"><span class="nav-number">1.1.1.</span> <span class="nav-text">Scrolling</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#Memory"><span class="nav-number">1.1.2.</span> <span class="nav-text">Memory</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#Auto-Layout"><span class="nav-number">1.1.3.</span> <span class="nav-text">Auto Layout</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Swiftification"><span class="nav-number">1.2.</span> <span class="nav-text">Swiftification</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#NSSecureCoding"><span class="nav-number">1.3.</span> <span class="nav-text">NSSecureCoding</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#API-Enhancements"><span class="nav-number">2.</span> <span class="nav-text">API Enhancements</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#Notifications"><span class="nav-number">2.1.</span> <span class="nav-text">Notifications</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Messages"><span class="nav-number">2.2.</span> <span class="nav-text">Messages</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Automatic-Passwords-and-Security-Code-AutoFill"><span class="nav-number">2.3.</span> <span class="nav-text">Automatic Passwords and Security Code AutoFill</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Safe-Area"><span class="nav-number">2.4.</span> <span class="nav-text">Safe Area</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#Siri-shortcuts"><span class="nav-number">3.</span> <span class="nav-text">Siri shortcuts</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#NSUserActivity"><span class="nav-number">3.1.</span> <span class="nav-text">NSUserActivity</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Intents"><span class="nav-number">3.2.</span> <span class="nav-text">Intents</span></a></li></ol></li></ol></div>
</div>
</section>
<!--/noindex-->
</div>
</aside>
</div>
</main>
<footer id="footer" class="footer">
<div class="footer-inner">
<div class="copyright" >
© 2016 -
<span itemprop="copyrightYear">2025</span>
<span class="with-love">
<i class="fa fa-heart"></i>
</span>
<span class="author" itemprop="copyrightHolder">Roc Zhang</span>
</div>
<div class="powered-by">
由 <a class="theme-link" href="https://hexo.io" target="_blank" rel="noopener">Hexo</a> 强力驱动
</div>
<div class="theme-info">
主题 -
<a class="theme-link" href="https://github.com/iissnan/hexo-theme-next" target="_blank" rel="noopener">
NexT.Mist
</a>
</div>
</div>
</footer>
<div class="back-to-top">
<i class="fa fa-arrow-up"></i>
</div>
</div>
<script type="text/javascript">
if (Object.prototype.toString.call(window.Promise) !== '[object Function]') {
window.Promise = null;
}
</script>
<script type="text/javascript" src="/lib/jquery/index.js?v=2.1.3"></script>
<script type="text/javascript" src="/lib/fastclick/lib/fastclick.min.js?v=1.0.6"></script>
<script type="text/javascript" src="/lib/jquery_lazyload/jquery.lazyload.js?v=1.9.7"></script>
<script type="text/javascript" src="/lib/velocity/velocity.min.js?v=1.2.1"></script>
<script type="text/javascript" src="/lib/velocity/velocity.ui.min.js?v=1.2.1"></script>
<script type="text/javascript" src="/lib/fancybox/source/jquery.fancybox.pack.js?v=2.1.5"></script>
<script type="text/javascript" src="/js/src/utils.js?v=5.1.0"></script>
<script type="text/javascript" src="/js/src/motion.js?v=5.1.0"></script>
<script type="text/javascript" src="/js/src/scrollspy.js?v=5.1.0"></script>
<script type="text/javascript" src="/js/src/post-details.js?v=5.1.0"></script>
<script type="text/javascript" src="/js/src/bootstrap.js?v=5.1.0"></script>
<script id="dsq-count-scr" src="https://roczhang.disqus.com/count.js" async></script>
<script type="text/javascript">
var disqus_config = function () {
this.page.url = 'http://www.roczhang.com/wwdc18-notes-what-is-new-in-cocoa-touch.html';
this.page.identifier = 'wwdc18-notes-what-is-new-in-cocoa-touch.html';
this.page.title = 'WWDC18 Notes - What\'s New in Cocoa Touch';
};
var d = document, s = d.createElement('script');
s.src = 'https://roczhang.disqus.com/embed.js';
s.setAttribute('data-timestamp', '' + +new Date());
(d.head || d.body).appendChild(s);
</script>
<script>
var cloudTieConfig = {
url: document.location.href,
sourceId: "",
productKey: "a79c1aa145ae437d8c58e9e10aa1c84a",
target: "cloud-tie-wrapper"
};
</script>
<script src="https://img1.ws.126.net/f2e/tie/yun/sdk/loader.js"></script>
</body>
</html>