SwiftUI 转义闭包捕获变异的“self"参数 [英] SwiftUI Escaping closure captures mutating 'self' parameter

问题描述

我有一个可以通过两种方式打开的视图.一个带有提供给它的数据，另一个带有对 Firestore 文档的文档引用.我创建了两个构造函数，第一个我提供数据，另一个我提供文档参考.然后我使用此参考进行网络调用位我收到一个错误:

I have a view which can be opened in two ways. One with the data provided to it, and the other with a document reference to a Firestore document. I have created two constructors and in the first one I'm providing the data and in the other one I'm a providing the document reference. Then I'm using this reference to make a network call bit I'm getting an error:

转义闭包捕获变异的self"参数

知道如何解决这个问题吗?

Any idea on how to solve this problem?

@State var request: RequestModel?

init(request: RequestModel) {
    self.request = request
}

init(reference: DocumentReference) {
    FirestoreService().fetchDocument(documentReference: reference) { (request: RequestModel) in
        self.request = request
    }
}

推荐答案

对象的初始化程序不能异步执行任何操作.它的工作是立即生成对象，并初始化其所有属性.

An object's initializer cannot do anything asynchronous. Its job is to produce the object immediately, with all its properties initialized.

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