我正在编写一个待办事项列表应用程序,这是我的代码:
struct TaskItem: View {
@State var task : Task
@Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
@EnvironmentObject var taskData: UserData
@ObservedObject private var keyboard = KeyboardResponder()
var body: some View {
Form{
Section(header: Text("Details").font(.headline)){
HStack{
TextField("Title", text: $task.title ).font(Font.headline)
}
TextField("Description", text: $task.description)
.font(Font.body)
}
Section{
Toggle("Mark as Done", isOn: $task.isDone)
}
Section{
Picker(selection: $task.priority, label: Text("priority")) {
Text("very important").tag(2)
Text("important").tag(1)
Text("need to do").tag(0)
}.pickerStyle(SegmentedPickerStyle()).padding(5)
}
}
.padding(.bottom, keyboard.currentHeight)
.edgesIgnoringSafeArea(.bottom)
.animation(.easeOut(duration: 0.16))
.navigationBarItems(trailing: Button(action: {
//save data
var result :[Task]
result = save(id: self.task.id,
creationDate: self.task.creationDate,
creationDateYear: self.task.creationDateYear,
creationDateMonth: self.task.creationDateMonth,
creationDateDay: self.task.creationDateDay,
dueDate: self.task.dueDate,
time: self.task.time,
title: self.task.title,
description: self.task.description,
priority: self.task.priority,
isDone: self.task.isDone, taskData: self.taskData.taskData)
self.taskData.taskData = result
self.presentationMode.wrappedValue.dismiss()
}, label:{
Text("save")
}))
// here I put my save code
}
}
当按下保存按钮时,任务的 var 被保存。我想删除保存按钮并在更改值后自动保存数据。当我将 // save data code 块从 save 按钮函数移到 var body 中时,我得到“函数声明了一个不透明的返回类型,但在其主体中没有返回语句来推断底层类型”错误。
enter code here