January 2023
Intermediate to advanced
288 pages
6h 6m
Chinese
Content preview from 移动端AI与ML应用开发：基于iOS和Android
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iOS
上使用
ML Kit
的文本处理应用程序
|
115
7.2.2
第
2
步：创建故事板、动作和输出
绘图平面是一个 UIImageView，因此在故事板上绘制一个覆盖大部分屏幕的大平面。还
要添加一个按钮，并将其标签更改为 Detect，如图 7-4 所示。
图
7-4
：创建故事板
完成后，为图像视图创建一个输出（称为
mainImageView
），并为按钮创建一个动作（称
为
recognizeInk
）。向该动作添加对名为
doRecognition()
的函数的调用。如果 Xcode
抱怨该函数还不存在，请不要担心。你很快就会创建它。
你的代码应如下所示：
@IBAction func recognizeInk(_ sender: Any) {
doRecognition()
}
@IBOutlet weak var mainImageView: UIImageView!
7.2.3
第
3
步：笔画、点和墨迹
使用 ML Kit 识别笔迹时，你将传递给它一个墨迹对象。这个对象由许多笔画组成，每个
笔画都是许多点。例如，考虑字母 Z。它可以由三个笔画组成：一个用于顶线，一个用于
对角线，一个用于底线。墨迹是笔画的集合，每个笔画都是用户画线时收集的一些点。
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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.