ios - SwiftUI:onDismiss 没有被调用

Question

我的问题是，如果我以编程方式关闭 View ，则不会调用 .sheet 中的 onDismiss 。如果我通常通过向下滑动来关闭 View onDismiss 则会正常调用。

View 1:

HStack {
    Text("Twittere deine Antwort")
    Spacer()
}
.onTapGesture {
    self.showPostCommentView = true
}
.sheet(isPresented: self.$showPostCommentView, onDismiss: {
    self.optionManager.getTweet() // <--- This does not get called
}) {
    PostTweetView(postCommentTweet: self.optionManager.tweet, postTweetImage: self.image, profileImage: self.imageLoader.image)
}

View 2:

@Environment(\.presentationMode) private var presentationMode

Button(action: {
     // some async operations... When finished completion gets called
     self.tweetManager.sendTweet(completion: { self.presentationMode.wrappedValue.dismiss() })
}) {
    Text("Twittern")
}

Answer 1

将 @escaping 闭包添加到您的 PostTweetView 中，并将您的 onDismiss 代码添加到该闭包中。确保 PostTweetView 中的 init 也分配了所有局部变量:

PostTweetView:

@Environment(\.presentationMode) private var presentationMode
var onDismiss: () -> Void
init(/* All the other local variables in this view */ onDismiss: @escaping () -> Void) {
    // initialize all the other local variables
    self.onDismiss = onDismiss
}

Button(action: {
    // some async operations... When finished completion gets called
    self.tweetManager.sendTweet(completion: { 
        self.presentationMode.wrappedValue.dismiss()
        self.onDismiss()
    })
}) {
    Text("Twittern")
}

view1 来自您原来的问题:

HStack {
    Text("Twittere deine Antwort")
    Spacer()
}
.onTapGesture {
    self.showPostCommentView = true
}
.sheet(isPresented: self.$showPostCommentView, onDismiss: {
    self.optionManager.getTweet() // <--- This does not get called
}) {
    PostTweetView(postCommentTweet: self.optionManager.tweet, postTweetImage: self.image, profileImage: self.imageLoader.image) {
        self.optionManager.getTweet()
    }
}