我正在使用 ViewControllerRepresentable 来呈现 MFMessageComposeViewController，以便用户可以从我的应用程序发送文本。
然而，每次呈现视图时，它都非常有问题——元素随机消失，滚动关闭，屏幕闪烁。在 iOS 14.2 和 14.3 上测试。
这是代码：
import SwiftUI
import MessageUI
struct MessageView: UIViewControllerRepresentable {
var recipient: String
class Coordinator: NSObject, MFMessageComposeViewControllerDelegate {
var completion: () -> Void
init(completion: @escaping ()->Void) {
self.completion = completion
}
// delegate method
func messageComposeViewController(_ controller: MFMessageComposeViewController,
didFinishWith result: MessageComposeResult) {
controller.dismiss(animated: true, completion: nil)
completion()
}
}
func makeCoordinator() -> Coordinator {
return Coordinator() {} // not using completion handler
}
func makeUIViewController(context: Context) -> MFMessageComposeViewController {
let vc = MFMessageComposeViewController()
vc.recipients = [recipient]
vc.messageComposeDelegate = context.coordinator
return vc
}
func updateUIViewController(_ uiViewController: MFMessageComposeViewController, context: Context) {}
typealias UIViewControllerType = MFMessageComposeViewController
}
和我的看法
struct ContentView: View {
@State private var isShowingMessages = false
@State var result: Result<MFMailComposeResult, Error>? = nil
var body: some View {
VStack {
Button("Show Messages") {
self.isShowingMessages = true
}
.sheet(isPresented: self.$isShowingMessages) {
MessageView(recipient: "+15555555555")
}
.edgesIgnoringSafeArea(.bottom)
}
}
}
我呈现这种观点的方式有问题吗？有没有其他人经历过这种行为？MFMailComposeViewController 也会发生类似的行为，但它没有那么错误。