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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112
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第
7
章
7.1.5
第
5
步：从文本中提取实体
早些时候，当你为按钮创建动作时，你会得到一个名为
doExtraction
的函数。你想在
其中调用
extractEntities
，你很快就可以创建它，但前提是模型可用。你在第 3 步中
下载了模型，并在完成后将
modelAvailable
设置为 true，因此你可以使用以下代码：
@IBAction func doExtraction(_ sender: Any) {
if(modelAvailable){
extractEntities()
} else {
txtOutput.text = "Model not yet downloaded, please try later."
}
}
你现在可以创建
extractEntities
函数，在其中，你可以使用刚创建的
entityExtractor
和
txtInput
中的文本来获取文本中的实体。
首先创建代码来提取这样的实体：
func extractEntities(){
let strText = txtInput.text
entityExtractor.annotateText(
strText!,
completion: {
}
}
在这里，你已将文本传递到
entityExtractor
的
annotateText
方法中。它会在完成时
给你一个回调，回调包含结果和错误数据结构。结果是一个注释列表，每个注释都是一
个实体列表。
实体具有定义注释类型的
entityType
属性，例如电子邮件、地址或 ...
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