February 2017
Beginner to intermediate
472 pages
9h 53m
Chinese
Content preview from Swift学习手册
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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.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.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.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.
处理文件和文件类型
｜
261
14.
把标注与
extensionLabel
outlet
连接起来。
15.
把
DocumentViewController
类中的
attachmentsCollectionView
outlet
与集合视图
连接起来。
16.
按住
Control
键，从集合视图拖曳到视图控制器上，在弹出的菜单中选择“
dataSource
”。
17.
重复上一步，这一次在弹出的菜单中选择“
delegate
”。
18.
打开
DocumentViewController.swift
，把下述代码添加到
viewWillAppear
方法中：
//
如果文档尚未打开，把它打开
if document.documentState.contains(UIDocumentState.Closed) {
document.openWithCompletionHandler { (success) -> Void in
if success == true {
self.textView?.attributedText = document.text
> self.attachmentsCollectionView?.reloadData()
}
这行代码的作用是，打开文档后让视图控制器重新加载集合视图中的内容。这样附
件列表中才会有内容。
19.
最后，把下述代码添加到
viewWillAppear
方法的末尾，即便文档不是刚打开的，也
刷新附件列表：
//
重新加载附件列表，以防我们离开时有变化 ...
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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.