February 2017
Beginner to intermediate
472 pages
9h 53m
Chinese
Content preview from Swift学习手册
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用户界面和
iCloud
｜
143
图 6-12
：
设置新文件
9.
打开
AddAttachmentViewController.xib
。你会看到一个全新的空视图（见图
6-13
）。
图 6-13
：
空的 AddAttachmentViewController.xib
144
｜
第
6
章
10.
调整这个空视图的尺寸，把空视图的高度变成宽度的约四分之一。
11.
在视图中添加一个下压按钮（
push button
），把按钮上的文字设为“
Add File
”，
如图
6-14
所示。把按钮放到视图的中心，然后打开“
Editor
”菜单，选择“
Resolve
Auto Layout Issues
”→“
Reset to Suggested Constraints
”，添加约束，确保按钮在中心。
图 6-14
：
添加
“
Add File
”
按钮
12.
现在，我们要确认
File
’
s Owner
是否正确。在大纲顶部选择“
File
’
s Owner
”（见
图
6-15
）。每个
nib
文件都有
File
’
s Owner
，这是一个占位对象，表示处理
nib
中内容的控制器对象。如果把
File
’
s Owner
与
AddAttachmentViewController
类（ 在
AddAttachmentViewContr ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.