问题描述
我正在使用 ViewControllerRepresentable 来呈现 MFMessageComposeViewController,以便用户可以从我的应用发送文本。
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。
代码如下:
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
}
我的观点
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什么问题吗?有没有其他人经历过这种行为? MFMailComposeViewController 也会发生类似的行为,但没有那么严重。
解决方法
5 分钟后,我意识到我需要在展示工作表时添加此内容:
this.columnDefinitions: Column[] = [
// ...
{ id: 'valueDate',field: 'valueDate',name: 'Transaction Date ',formatter: Formatters.dateEuro },];
this.gridOptions: GridOption = {
// you can customize the date separator through "formatterOptions"
formatterOptions: {
// What separator to use to display a Date,for example using "." it could be "2002.01.01"
dateSeparator: '-',// can be any of '/' | '-' | '.' | ' ' | ''
}
};
该视图看起来有问题,因为它试图考虑键盘安全区域并且很难做到。