如何从 SwiftUI 的列表中获取已删除行的索引?

问题描述

我想从使用 ForEach 显示为列表的数组中删除一个元素，但我还需要向 发送一个 HTTP 请求>REST API 并且我需要将元素的索引放在请求正文中.这是我的代码:

I want to delete an element from an array that I am displaying as a list using a ForEach, but I also need to send a HTTP request to a REST API and I need to put the index of the element in the body of the request. Here is my code:

ForEach(self.symptoms, id: \.self) { symptom in
           VStack(alignment: .leading) {
                    Text(symptom)
            }
}.onDelete(perform: delete)

这里是删除函数:

func delete(at offsets: IndexSet) {     
      self.symptoms.remove(atOffsets: offsets)
      // here I want to make the HTTP request
}

推荐答案

如果你逐个删除，那么下面给你删除行的索引

If you remove by-one, then the following give you index of deleted row

func delete(at offsets: IndexSet) {     
      self.symptoms.remove(atOffsets: offsets)

      // here I want to make the HTTP request
      let index = offsets[offsets.startIndex]

      // ... use index in HTTP request
}

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