January 2020
Intermediate to advanced
356 pages
6h 4m
Chinese
Content preview from Swift游戏开发经典实例
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视图和菜单
｜
47
2.1
使用故事板
问题
我们需要采取某种方式来组织游戏屏幕，定义不同屏幕之间的联系以及每个屏幕需
要显示什么内容。
解决方案
我们可以使用故事板来组织游戏屏幕
:
1.
创建一个
Single-view Application
项目。并根据自己的需要为项目命名。
2.
打开
Main.storyboard
文件。目前它显示了一个空的
iPhone/iPad
屏幕窗口。
3.
打开
Utilities
面板，如果
Utilities
未显示在
Xcode
窗口中，你可以通过点击
工具栏最右边的
Utilities
面板按钮。在面板底部，有一个
Objects Library
窗
口，显示了一个对象列表，这些对象是你能够添加到故事板中的对象（见图
2-1
）。如果看不到这个对象列表，请点击“
Show or hide object library
”按 钮（ 该
按钮位于右下角，图标是一个圆中包含一个方块）。当然，你也可以用快捷键
Control+Option+Command+3
。
4.
向下滚动
Objects Library
列表，直到找到按钮对象，如图
2-2
所示。也可以在
列表底部的搜索栏中输入“
button
”，这样就能快速定位到按钮对象。
5.
将按钮对象拖到故事板默认的
iPhone/iPad
窗口中央。
6.
要将按钮对齐到窗口的中心，你可以按下
Ctrl
键
+
鼠标左键（或者用右键），
从按钮对象拖一条线到
view
对象（即容纳按钮对象的视图）。此时会弹出一个
显示布局约束的列表，按住
Shift
键，依次点击
Center Horizontally ...
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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.