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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我们也可以通过属性面板来设置绝大多数视图的
tint color
属性。
讨论
大部分
（但不是全部）
控件都可以被定制化。定制化控件外观有两种主要的方式：
•
修改
Tint Color
属性，可以改变控件的整体颜色。
•
修改背景图片，可以通过位图来改变控件的外观。
修改
Tint Color
属性，可以调用
setTintColor:
方法。有的控件只有一个
Tint Color
属性，则调用
setTintColor:
方法就可以了。而有的控件可能会有多个
Tint Color
属性，我们需要分别设置它们。例如
UIProgressView
控件，我们需要这样做：
self.progressView.progressTintColor = UIColor.orange
我们可以为某种类型的控件统一设置
Tint Color
属性。也就是使用
Appearance
Proxy
。
Appearance Proxy
是某种对象，从拥有系统外观控制属性的某一个
class
中
获得这个对象，你可以通过它来设置属于这一类控件的所有对象的外观属性（如
Tint Color
和背景图片），通过这种方式修改的属性对所有这一类的实例都有效。
例如，如果想将所有
Progress View
的
Tint Color
都设置为紫色，则可以这样做：
UIProgressView.appearance().progressTintColor = UIColor.purple
同理，你还可以修改所有
Navigation Bar
的背景图片：
UINavigationBar.appearance() ...
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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.