swiftui

问题 With the new ScrolLViewReader , it seems possible to set the scroll offset programmatically. But I was wondering if it is also possible to get the current scroll position? It seems like the ScrollViewProxy only comes with the scrollTo method, allowing us to set the offset. Thanks! 回答1: It was possible to read it and before. Here is a solution based on view preferences. struct DemoScrollViewOffsetView: View { @State private var offset = CGFloat.zero var body: some View { ScrollView { VStack {

问题 @State private var isOn1 = false @State private var isOn2 = false var body: some View { ScrollView{ Toggle("switch1",isOn:$isOn1) Toggle("switch2",isOn:$isOn2) } Here is what I have so far. Is there a way for me to add an if statement when activating a toggle that all the other toggles will be off. Or is there anyway to change the states of the toggles when activating one. Any answers are appreciated thank you! 回答1: You can define isOn2 as a Binding . You can create a Binding by passing in a

问题 I'm trying to remove the white background of some sections so the elements lay right on the grey background, but I can't get the section background to be removed or transparent. This is what I'm trying: struct ContentView: View { var body: some View { Form { Section { Text("Hello!") Button { print("Clicked") } label: { Text("Click Me!!") } } Section { VStack { Button("Button 1") {} Spacer() Button("Button 2") {} } } .background(Color.clear) // Not doing anything Section { VStack(alignment:

问题 In my navigation, I want to be able to go from ContentView -> ModelListView -> ModelEditView OR ModelAddView . Got this working, my issue now being that when I hit the Back button from ModelAddView , the intermediate view is omitted and it pops back to ContentView ; a behaviour that ModelEditView does not have. There's a reason for that I guess – how can I get back to ModelListView when dismissing ModelAddView ? Here's the code: import SwiftUI struct ContentView: View { var body: some View {

问题 In my navigation, I want to be able to go from ContentView -> ModelListView -> ModelEditView OR ModelAddView . Got this working, my issue now being that when I hit the Back button from ModelAddView , the intermediate view is omitted and it pops back to ContentView ; a behaviour that ModelEditView does not have. There's a reason for that I guess – how can I get back to ModelListView when dismissing ModelAddView ? Here's the code: import SwiftUI struct ContentView: View { var body: some View {

问题 In my navigation, I want to be able to go from ContentView -> ModelListView -> ModelEditView OR ModelAddView . Got this working, my issue now being that when I hit the Back button from ModelAddView , the intermediate view is omitted and it pops back to ContentView ; a behaviour that ModelEditView does not have. There's a reason for that I guess – how can I get back to ModelListView when dismissing ModelAddView ? Here's the code: import SwiftUI struct ContentView: View { var body: some View {

问题 In my navigation, I want to be able to go from ContentView -> ModelListView -> ModelEditView OR ModelAddView . Got this working, my issue now being that when I hit the Back button from ModelAddView , the intermediate view is omitted and it pops back to ContentView ; a behaviour that ModelEditView does not have. There's a reason for that I guess – how can I get back to ModelListView when dismissing ModelAddView ? Here's the code: import SwiftUI struct ContentView: View { var body: some View {

问题 I'm trying to remove the white background of some sections so the elements lay right on the grey background, but I can't get the section background to be removed or transparent. This is what I'm trying: struct ContentView: View { var body: some View { Form { Section { Text("Hello!") Button { print("Clicked") } label: { Text("Click Me!!") } } Section { VStack { Button("Button 1") {} Spacer() Button("Button 2") {} } } .background(Color.clear) // Not doing anything Section { VStack(alignment:

问题 Here is my example, and I can't tell if this is a bug or not. All my cells load correctly, but when I try to bring up the DetailView() as a sheet, the item pased in is always whatevr item is shown first in the grid (in the top left in my case here), NOT the "cell" that was tapped. So, why is the item from ForEach loop correctly populating the cells, but not being passed to the .sheet via the button? import SwiftUI let columnCount: Int = 11 let gridSpacing: CGFloat = 1 struct GridView: View {

问题 I used to save important App data like login credentials into UserDefaults using the following statement: UserDefaults.standard.set("sample@email.com", forKey: "emailAddress") Now, I have come to know SwiftUI has introduced new property wrapper called: @AppStorage Could anyone please explain how the new feature works? 回答1: @AppStorage is a convenient way to save and read variables from UserDefaults and use them in the same way as @State properties. It can be seen as a @State property which is