My main view is as simple as follows:
VStack(alignment: .center, spacing: .spacing4) {
ExpandableView() // some params for title etc, not relevant
ExpandableView()
}
.padding(.horizontal, 10)
.padding(.vertical, 18)
While my ExpandableView is as follows:
public struct ExpandableView: View {
#State var showExpanded = false
public var body: some View {
VStack(alignment: .leading, spacing: .spacing2) {
HStack(spacing: .spacing2, content: {
Text("Title")
Spacer()
arrowView // The chevron image
})
.contentShape(Rectangle()) // so the complete HStack is tappable
.onTapGesture {
withAnimation(.spring()) {
showExpanded.toggle()
}
}
.animation(nil)
if showExpanded {
Text("The expanded text underneath the title goes here")
.transition(.opacity.combined(with: .flipFromTop))
}
}
}
As you can see in the image, when I expand the second view in the main VStack, the first one animates too, what am I doing wrong here?
Related
I'm struggling with a view where I want to have multiple pickers embedded in
other views. When I wrap the pickers in a Form, I get the desired behavior for the
picker but there is a lot of extra space around the pickers that I can't seem to
automatically adjust.
This is an example - the space in the red outline seems to be determined by the other
view elements not the size of the picker.
I can, of course, hard-code a frame height for the Form but that is trial and error
and would only be specific to the device and orientation. I have tried multiple
versions of Stacks inside Stacks with padding, GeometryReader etc, but I have not come up with any
solution. As an aside, I DO want the picker labels, otherwise I could just remove
the Form.
I also tried setting UITableView.appearance().tableFooterView in an init() but that did not work either.
Here is a simplified version:
struct ContentView4: View {
#State var selectedNumber1: Int = 1
#State var selectedNumber2: Int = 2
#State var selectedNumber3: Int = 3
var body: some View {
NavigationView {
VStack(alignment: .leading) {
HStack {
Spacer()
Text("Compare up to 3")
.font(.caption)
Spacer()
}//h
Form {//for pickers
Picker(selection: $selectedNumber1, label: Text("A")) {
ForEach(0..<10) {
Text("\($0)")
}
}//picker
Picker(selection: $selectedNumber2, label: Text("B")) {
ForEach(0..<10) {
Text("\($0)")
}
}//picker
Picker(selection: $selectedNumber3, label: Text("C")) {
ForEach(0..<10) {
Text("\($0)")
}
}//picker
}//form for pickers
.padding(.horizontal, 10)
//.frame(height: 200) //don't want to hard code this
VStack(alignment: .leading) {
HStack {
Text("A")
.frame(width: 100)
Text("B")
.frame(width: 100)
Text("C")
.frame(width: 100)
}
.padding(.horizontal, 10)
ScrollView(.vertical, showsIndicators: false) {
VStack(alignment: .leading){
Text("A title line")
.font(.headline)
.padding(.vertical, 5)
HStack {
Text("Number")
.frame(width: 100)
Text("Number")
.frame(width: 100)
Text("Number")
.frame(width: 100)
}
Text("Another title line")
.font(.headline)
.padding(.vertical, 5)
HStack {
Text("Something")
.frame(width: 100)
Text("Something")
.frame(width: 100)
Text("Something")
.frame(width: 100)
}
Text("A Third title line")
.font(.headline)
.padding(.vertical, 5)
HStack {
Text("More")
.frame(width: 100)
Text("More")
.frame(width: 100)
Text("More")
.frame(width: 100)
}
}
}//scroll
.padding(.horizontal, 10)
}
.navigationBarTitle("Compare Three", displayMode: .inline)
}
}//nav
}//body
}//struct
Interestingly, I am able to get a solution by removing the form and wrapping each
picker in a menu, like this:
Menu {
Picker(selection: $selectedNumber2, label: EmptyView()) {
ForEach(0..<10) {
Text("\($0)")
}
}//picker
} label: {
HStack {
Text("B")
Spacer()
Image(systemName: "chevron.right")
.resizable()
.frame(width: 14, height: 14)
}//h
}//menu label
However, I still like the look of the Form better if I could automatically configure
the space around the Form items.
Any guidance would be appreciated. Xcode 13.4, iOS 15.5
Form (and List) is not meant to be stacked inside other views like this, which is why it has such strange behavior.
Thankfully, it's fairly simple to recreate the stuff you do want using NavigationLink. Here’s a quick example of a couple custom views that do just that:
// drop-in NavigationLink replacement for Picker
struct NavigationButton<Content: View, SelectionValue: Hashable> : View {
#Binding var selection: SelectionValue
#ViewBuilder let content: () -> Content
#ViewBuilder let label: () -> Text
var body: some View {
NavigationLink {
PickerView(selection: $selection, content: content, label: label)
} label: {
HStack {
label()
Spacer()
Text(String(describing: selection))
.foregroundColor(.secondary)
}
.contentShape(Rectangle())
}
.buttonStyle(NavigationLinkButtonStyle())
}
}
// subview for the Picker page, which lets us use `dismiss()`
// to pop the subview when the user selects an option
struct PickerView<Content: View, SelectionValue: Hashable> : View {
#Binding var selection: SelectionValue
#ViewBuilder let content: () -> Content
#ViewBuilder let label: () -> Text
#Environment(\.dismiss) private var dismiss
var body: some View {
Form {
Picker(selection: $selection, content: content, label: label)
.pickerStyle(.inline)
.labelsHidden()
.onChange(of: selection) { _ in
dismiss()
}
}
.navigationTitle(label())
}
}
// recreate the appearance of a List row
struct NavigationLinkButtonStyle: ButtonStyle {
func makeBody(configuration: Configuration) -> some View {
HStack {
configuration.label
.frame(maxWidth: .infinity)
Image(systemName: "chevron.right")
.font(.footnote.bold())
.foregroundColor(Color(UIColor.tertiaryLabel))
}
.padding()
.background(
Rectangle()
.fill(configuration.isPressed ? Color(UIColor.quaternaryLabel) : Color(UIColor.systemBackground))
)
}
}
If you like the .insetGrouped style you got using Form, we can replicate that by putting NavigationButton inside a clipped VStack:
VStack(spacing: 0) {
NavigationButton(selection: $selectedNumber1) {
ForEach(0..<10) {
Text("\($0)")
}
} label: {
Text("A")
}
Divider()
NavigationButton(selection: $selectedNumber2) {
ForEach(0..<10) {
Text("\($0)")
}
} label: {
Text("B")
}
}
.clipShape(RoundedRectangle(cornerRadius: 11))
.padding()
.background(Color(UIColor.systemGroupedBackground))
And here’s a screenshot showing my custom views above your original Form.
(And if you like Picker as a popup menu, you could use Menu instead of NavigationLink)
I am trying to create sticky footer in swiftUI where other part of screen is scrollable but in footer there is one view with buttons and other element which should be fixed.
Thank You for help.
If I understand correctly, what you want to do is stack vertically (VStack)
a Scrollview
another VStack (with the Toggle and the Button), aligned at the bottom :
VStack {
ScrollView {...} // 1
VStack { // 2
Toggle(...)
Button(...)
}
.frame(alignment: .bottom)
}
To take your example :
struct SwiftUIView: View {
#State private var checked: Bool = false
let text = String(repeating: "blabla ", count: 20)
var body: some View {
VStack {
ScrollView {
ForEach((1...100), id: \.self) {_ in
Text(text)
}
}
VStack {
Toggle(isOn: $checked, label: {
Text("I have read...")
})
Button("Enter") {
// action
}
.frame(maxWidth: .infinity)
.padding(.vertical)
.background(Color.red)
}
.padding()
.border(Color.black)
.frame(alignment: .bottom)
}
}
}
I am currently creating a content view for my application and am experiencing some strange behavior with padding. As seen in the photo below, there is quite a bit of space below the navigation bar at the top of the phone. I don't specify any padding here so I'm wondering why there is so much space between the top and where the image is displayed. The image doesn't have that large of a white box around it either.
My code does not specify any kind of margin or padding. I'm new to Swift and SwiftUI so I'm curious if there is some automatic padding applied to navigation views?
import Kingfisher
struct BottleView: View {
let bottle: Bottle
var body: some View {
VStack {
KFImage(URL(string: bottle.image ?? "")!)
.resizable()
.frame(width: 128, height: 256)
VStack(alignment: .leading) {
HStack {
Text(bottle.name)
.font(.title)
Spacer()
Text("Price")
}
HStack {
Text(bottle.varietal ?? "")
Spacer()
Text("$\(bottle.price ?? "")")
}
.font(.subheadline)
.foregroundColor(.secondary)
VStack(alignment: .leading) {
Text("Information")
.font(.title2)
Text(bottle.information ?? "")
}
}
}
}
}
If you apply a .background(Color.red) to the VStack, you'll see that it's centered in the screen.
var body: some View {
VStack {
Image("TestImage")
.resizable()
.frame(width: 128, height: 256)
/// ... more code
}
.background(Color.red)
}
This is because, by default, most SwiftUI views are centered. For example, try just a Text:
struct ContentView: View {
var body: some View {
Text("Hello, I'm centered!")
}
}
So if you don't want it centered, this is where Spacers come in. These expand to fill all available space, pushing all other views. Here's the code that gets rid of the "bit of space below the navigation bar at the top of the phone":
(note that I replaced your Bottle properties with static text, make sure you change them back)
struct BottleView: View {
// let bottle: Bottle
var body: some View {
VStack {
Image("TestImage")
.resizable()
.frame(width: 128, height: 256)
VStack(alignment: .leading) {
HStack {
Text("Blantons")
.font(.title)
Spacer()
Text("Price")
}
HStack {
Text("Bourbon")
Spacer()
Text("$59.99")
}
.font(.subheadline)
.foregroundColor(.secondary)
VStack(alignment: .leading) {
Text("Information")
.font(.title2)
Text("Product info here")
}
}
Spacer() /// spacer right here! pushes the other views up
}
.background(Color.red)
.navigationBarTitleDisplayMode(.inline) /// get rid of the additional top gap that the default Large Title navigation bar produces
}
}
Result:
OUTLINE
I have made a custom slimline sidebar that I am now implementing across the whole app. The sidebar consists of a main button that is always showing and when pressed it shows or hides the rest of the sidebar that consists of buttons navigating to other views.
I am currently implementing the sidebar across the app on each view by creating a ZStack like this:
struct MainView: View {
var body: some View {
ZStack(alignment: .topLeading) {
SideBarCustom()
Text("Hello, World!")
}
}
}
PROBLEM
I am planning on adding a GeometryReader so if the side bar is shown the rest of the content moves over. With this in mind, the way I am implementing the sidebar on every view feels clunky and a long winded way to add it. Is there a more simple/better method to add this to each view?
Sidebar Code:
struct SideBarCustom: View {
#State var isToggle = false
var names = ["Home", "Products", "Compare", "AR", "Search"]
var icons = ["house.fill", "printer.fill.and.paper.fill", "list.bullet.rectangle", "arkit", "magnifyingglass"]
var imgSize = 20
var body: some View {
GeometryReader { geo in
VStack {
Button(action: {
self.isToggle.toggle()
}, label: {
Image("hexagons")
.resizable()
.frame(width: 40, height: 40)
.padding(.bottom, 20)
})
if isToggle {
ZStack{
RoundedRectangle(cornerRadius: 5)
.foregroundColor(Color.red)
.frame(width: 70, height: geo.size.height)
VStack(alignment: .center, spacing: 60) {
ForEach(Array(zip(names, icons)), id: \.0) { item in
Button(action: {
// NAVIIGATE TO VIEW
}, label: {
VStack {
Image(systemName: item.1)
.resizable()
.frame(width: CGFloat(imgSize), height: CGFloat(imgSize))
Text(item.0)
}
})
}
}
}
}
}
}
}
}
I don't think there's necessarily a reason to use GeometryReader here. The following is an example that has a dynamic width sidebar (although you could set it to a fixed value) that slides in and out. The main content view resizes itself automatically, since it's in an HStack:
struct ContentView : View {
#State private var sidebarShown = false
var body: some View {
HStack {
if sidebarShown {
CustomSidebar(sidebarShown: $sidebarShown)
.frame(maxHeight: .infinity)
.border(Color.red)
.transition(sidebarShown ? .move(edge: .leading) : .move(edge: .trailing) )
}
ZStack(alignment: .topLeading) {
MainContentView()
.frame(maxWidth: .infinity, maxHeight: .infinity)
if !sidebarShown {
Button(action: {
withAnimation {
sidebarShown.toggle()
}
}) {
Image(systemName: "info.circle")
}
}
}
}
}
}
struct CustomSidebar : View {
#Binding var sidebarShown : Bool
var body: some View {
VStack {
Button(action: {
withAnimation {
sidebarShown.toggle()
}
}) {
Image(systemName: "info.circle")
}
Spacer()
Text("Hi")
Text("There")
Text("World")
Spacer()
}
}
}
struct MainContentView: View {
var body: some View {
VStack {
Text("Main content")
}
}
}
I want to put an HStack which contains two Texts in the top of any device screen.
the problem is when I use padding that I have to decide fixed size of padding.
struct ContentView: View {
var body: some View {
VStack(alignment: .leading) {
HStack(spacing: 10) {
Text("Hello world!")
Text("Hello world!")
}.padding(.top, 100)
Spacer()
}
}
}