I have a problem related on my List view. The question is simple: how can I get rid of that wierd gray rectangle showing on top of the TabBar? I didn't code that, I just implemented a controller with a List and NavigationBar and then it showed that thing.
For more clear explanation I post the images:
ItemRow.swift code:
import SwiftUI
struct ItemRow: View {
static let colors: [String: Color] = ["D": .purple, "G": .orange, "N": .red, "S": .yellow, "V": .pink]
var item: MenuItem
var body: some View {
NavigationLink(destination: Text(item.name)) {
HStack {
Image(item.thumbnailImage)
.clipShape(Circle())
.overlay(Circle().stroke(Color("IkeaBlu"), lineWidth: 2))
VStack(alignment: .leading){
Text(item.name)
.font(.headline)
Text("€ \(item.price)")
}.layoutPriority(1)
Spacer()
ForEach(item.restrictions, id: \.self) { restriction in
Text(restriction)
.font(.caption)
.fontWeight(.black)
.padding(5)
.background(Self.colors[restriction, default: .black])
.clipShape(Circle())
.foregroundColor(.white)
}
}
}
}
}
struct ItemRow_Previews: PreviewProvider {
static var previews: some View {
ItemRow(item: MenuItem.example)
}
}
thanks a lot for the help
Remove the marked part of hack from TabBar view and that glitch will go.
Tested with Xcode 11.4 / iOS 13.4
} .onAppear {
// UITabBar.appearance().isTranslucent = false // << this one !!
UITabBar.appearance().barTintColor = UIColor(named: "IkeaBlu")
}.accentColor(Color(.white))
Related
I apply ".animation (.easeIn)" but it is deprecated.
tells me: animation 'has been deprecated in iOS 15.0: use instead with Animation or animation (: value :), but animation (: value :) I don't know which value I need to pass. I can't create animations that start slowly. Can you please help me understand how I can properly use animation (_: value :) to make animation work? I have to create the animation that when I move the slider, the images slowly recompose in space according to how much they are enlarged or reduced.
thank you.
'''
import SwiftUI
struct GalleryView: View {
// MARK: - PROPERTIES
#State private var selectedAnimal: String = "lion"
let animals: [Animal] = Bundle.main.decode("animals.json")
let haptics = UIImpactFeedbackGenerator(style: .medium)
#State private var gridLayout: [GridItem] = [GridItem(.flexible())]
#State private var gridColumn: Double = 3.0
func gridSwitch() {
gridLayout = Array(repeating: .init(.flexible()), count: Int(gridColumn))
}
// MARK: - BODY
var body: some View {
ScrollView(.vertical, showsIndicators: false) {
VStack(alignment: .center, spacing: 30) {
// MARK: - IMAGE
Image(selectedAnimal)
.resizable()
.scaledToFit()
.clipShape(Circle())
.overlay(Circle().stroke(Color.white, lineWidth: 8))
// MARK: - SLIDER
Slider(value: $gridColumn, in: 2...4, step: 1) // se aumento il valore nello slider ci saranno più sezioni
.padding(.horizontal)
.onChange(of: gridColumn, perform: { value in
gridSwitch()
})
// MARK: - GRID
LazyVGrid(columns: gridLayout, alignment: .center, spacing: 10) {
ForEach(animals) { item in
Image(item.image)
.resizable()
.scaledToFit()
.clipShape(Circle())
.overlay(Circle().stroke(Color.white, lineWidth: 1))
.onTapGesture {
selectedAnimal = item.image
haptics.impactOccurred()
}
} //: LOOP
} //: GRID
.animation(.easeIn)
.onAppear(perform: {
gridSwitch()
})
} //: VSTACK
.padding(.horizontal, 10)
.padding(.vertical,50)
} //: SCROLL
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(MotionAnimationView())
}
}
// MARK: - PREVIEW
struct GalleryView_Previews: PreviewProvider {
static var previews: some View {
GalleryView()
}
}
As the error says, .animation() is deprecated, with iOS 15, you need to use .animation(value:) now. where the value is the binding that you want your animation to be triggered, in your case, I assume it is selectedAnimal.
Applying this would be something like
VStack {
}
.animation(.easeIn, value: selectedAnimal)
As discussed in comments, if you want your gridLayout to be animatable, it is a little bit more tricky. Because Arrays has to be Equatable if you want them to be animatable, since extending the GridItem is not a good solution, I came up with this:
delete your .animation method change your gridSwitch function with this:
struct GalleryView: View {
// ... irrelevant code
#State private var isGridChanged = false
func gridSwitch() {
if (isGridChanged) {
withAnimation {
gridLayout = Array(repeating: .init(.flexible()), count: Int(gridColumn))
}
}
else {
gridLayout = Array(repeating: .init(.flexible()), count: Int(gridColumn))
isGridChanged = true
}
}
isGridChanged is required because as you're changing your gridLayout when your View is initialized, it causes a weird bug that everything is getting scaled down when app launches because of withAnimation.
I had an earlier question that I got awesome help to but there's something not quite right with the layout still. Figured I'd create a new question rather than continue that one.
I'm making a custom picker using a button and want it laid out like the other pickers, textfields, etc on my form. In the previous question I learned to use the alignmentGuide. However that isn't working as the field isn't quite lined up with the others AND I can only make the window a bit smaller and then it locks into place. I want it to line up with above and be dynamic to window size adjustments when running.
Here's what it looks like right now
This is as small as I can make it:
And here's the current code:
import SwiftUI
struct ContentView: View {
#State var myName:String = "Kyra"
#State var selectedPickerItem: String?
var pickerItems = ["item 1",
"item 2",
"item 3",
"item 4",
"item 5",
"item 6"]
#State var showingPopover:Bool = false
#State var selectedItems = [String]()
#State var allItems:[String] = ["more items",
"another item",
"and more",
"still more",
"yet still more",
"and the final item"]
#State private var commonSize = CGSize()
#State private var commonTextSize = CGSize()
var body: some View {
Form {
TextField("My Name:", text: $myName, prompt: Text("What's your name?"))
.foregroundColor(.white)
.background(Color(red: 0.4192, green: 0.2358, blue: 0.3450))
Picker(selection: $selectedPickerItem, label: Text("Pick Something:")) {
Text("No Chosen Item").tag(nil as String?)
ForEach(pickerItems, id: \.self) { item in
Text(item).tag(item as String?)
}
}
.foregroundColor(.white)
.background(Color(red: 0.2645, green: 0.3347, blue: 0.4008))
HStack() {
Text("Select Items:")
.foregroundColor(.white)
.readSize { textSize in
commonTextSize = textSize
}
Button(action: {
showingPopover.toggle()
}) {
HStack {
Spacer()
Image(systemName: "\($selectedItems.count).circle")
.foregroundColor(.secondary)
.font(.title2)
Image(systemName: "chevron.right")
.foregroundColor(.secondary)
.font(.caption)
}
}
.readSize { textSize in
commonSize = textSize
}
.popover(isPresented: $showingPopover) {
EmptyView()
}
}
.alignmentGuide(.leading, computeValue: { d in (d.width - commonSize.width) })
.background(Color(red: 0.4192, green: 0.2358, blue: 0.3450))
}
.padding()
}
}
// FROM https://stackoverflow.com/questions/57577462/get-width-of-a-view-using-in-swiftui
extension View {
func readSize(onChange: #escaping (CGSize) -> Void) -> some View {
background(
GeometryReader { geometryProxy in
Color.clear
.preference(key: SizePreferenceKey.self, value: geometryProxy.size)
}
)
.onPreferenceChange(SizePreferenceKey.self, perform: onChange)
}
}
private struct SizePreferenceKey: PreferenceKey {
static var defaultValue: CGSize = .zero
static func reduce(value: inout CGSize, nextValue: () -> CGSize) {}
}
I've since upgraded to Ventura 13.0 beta on my Mac and upgraded Xcode too. With the upgrade I still have this issue; however, the SwiftUI upgrade includes the Grid control which fixes this layout bug. I figured with this current upgrade Grid I'd answer this question and mark as solved.
With the upgrade the controls still didn't line up, although I was able to make it as small as I wanted.
Form controls are still not lined up:
But I can make the form as small as I want however the controls' start and end locations jump around as I do.
With the update I was able to use the new Grid control (documentation link) to layout my controls making them look so much better.
Here it is using Grid. I can drag the edges of the window to make it as small or large as I want without any weirdness.
To do this I replaced my VStack with Grid and enclosed each control section with GridRow. My two bottom controls were too skinny so I combined the grid cells together so they'd take up the whole space by using the modifier .gridCellColumns(3). Code is:
Grid {
GridRow {
TextField("My Name:", text: $myName, prompt: Text("What's your name?"))
.foregroundColor(.white)
.background(Color(red: 0.4192, green: 0.2358, blue: 0.3450))
}
.gridCellColumns(3)
GridRow {
Picker(selection: $selectedPickerItem, label: Text("Pick Something:")) {
Text("No Chosen Item").tag(nil as String?)
ForEach(pickerItems, id: \.self) { item in
Text(item).tag(item as String?)
}
}
.foregroundColor(.white)
.background(Color(red: 0.2645, green: 0.3347, blue: 0.4008))
}
.gridCellColumns(3)
GridRow {
HStack() {
// Rather than a picker we're using Text for the label and a button for the picker itself
Text("Select Items:")
.foregroundColor(.white)
Button(action: {
// The only job of the button is to toggle the showing popover boolean so it pops up and we can select our items
showingPopover.toggle()
}) {
HStack {
Spacer()
Image(systemName: "\($selectedItems.count).circle")
.font(.title2)
Image(systemName: "chevron.right")
.font(.caption)
}
}
.popover(isPresented: $showingPopover) {
MultiSelectPickerView(allItems: allItems, selectedItems: $selectedItems)
// If you have issues with it being too skinny you can hardcode the width
.frame(width: 300)
}
}
.background(Color(red: 0.4192, green: 0.2358, blue: 0.3450))
}
.gridCellColumns(3)
}
.padding()
// Made a quick text section so we can see what we selected
Section("My selected items are:", content: {
Text(selectedItems.joined(separator: "\n"))
})
Hope this helps you out if you come across a similar issue.
I have a view sitting on top of a mapView (in a ZStack) and want to be able to have the green, upper view fade in and out with the .easeInOut animation modifier applied to the view's opacity. As you can see in the gif, it fades in nicely but disappears abruptly.
If I remove the mapView then all is good. If I replace the mapView with a simple Rectangle() then the problem returns so I believe it has something to do with the ZStack rather than the map. Funnily enough I'm actually using Mapbox rather than MapKit (as in the code below for simplicity) and the fade/abrupt disappear behaviour is reversed.
import SwiftUI
import MapKit
struct ContentView: View {
#State private var show = false
var body: some View {
VStack {
ZStack {
MapView()
if show {
LabelView()
.transition(AnyTransition.opacity.animation(.easeInOut(duration: 1.0)))
}
}
Button("Animate") {
self.show.toggle()
}.padding(20)
}
}
}
struct MapView: UIViewRepresentable {
func makeUIView(context: Context) -> MKMapView {
let mapView = MKMapView()
mapView.mapType = .standard
return mapView
}
func updateUIView(_ uiView: MKMapView, context: Context) { }
}
struct LabelView: View {
var body: some View {
Text("Hi there!")
.padding(10)
.font(.title)
.foregroundColor(.white)
.background(RoundedRectangle(cornerRadius: 8).fill(Color.green).shadow(color: .gray, radius: 3))
}
}
I have tried using alternative animation code, replacing the LabelView transition with:
.transition(.opacity)
and changing the button code to:
Button("Animate") {
withAnimation(.easeInOut(duration: 1.0)) {
self.show.toggle()
}
}
but the same behaviour appears each time. I'm guessing this is a SwiftUI bug but couldn't find any previous reference.
Here is working solution. Tested with Xcode 11.4 / iOS 13.4.
As it seen in demo presence of transparent label does not affect functionality of map view.
var body: some View {
VStack {
ZStack {
MapView()
LabelView().opacity(show ? 1 : 0) // here !!
}.animation(.easeInOut(duration: 1.0))
Button("Animate") {
self.show.toggle()
}.padding(20)
}
}
Another alternate, actually with the same visual effect is to embed LabelView into container and apply transition to it (it must be left something to render view disappearing)
var body: some View {
VStack {
ZStack {
MapView()
VStack { // << here !!
if show {
LabelView()
}
}.transition(.opacity).animation(.easeInOut(duration: 1.0))
}
Button("Animate") {
self.show.toggle()
}.padding(20)
}
}
try this: -> just added zIndex ...everything else the same
struct ContentView: View {
#State private var show = false
var body: some View {
VStack {
ZStack {
MapView().zIndex(0)
if show {
LabelView()
.zIndex(1)
.transition(AnyTransition.opacity.animation(.easeInOut(duration: 1.0)))
}
}
Button("Animate") {
self.show.toggle()
}.padding(20)
}
}
}
and read this:
Transition animation not working in SwiftUI
I want to display a label in the centre of a view with a progress indicator to the right of the label. How can I do this in SwiftUI on macOS?
The code below aligns the HStack in the centre of the VStack but I want the text centered and the progress indicator aligned with the text's trailing edge. I guess I could replace the HStack with a ZStack but it's still not clear how one aligns two controls to each other or how one prevents the container from be centered by its container.
import SwiftUI
struct AlignmentTestView: View {
var body: some View {
VStack(alignment: .center, spacing: 4) {
HStack {
Text("Some text")
ActivityIndicator()
}
}.frame(width: 200, height: 200)
.background(Color.pink)
}
}
struct AlignmentTestView_Previews: PreviewProvider {
static var previews: some View {
AlignmentTestView()
}
}
Here is possible approach (tested replacing ActivityIndicator with just circle).
Used Xcode 11.4 / iOS 13.4 / macOS 10.15.4
var body: some View {
VStack {
HStack {
Text("Some text")
.alignmentGuide(.hAlignment) { $0.width / 2.0 }
ActivityIndicator()
}
}
.frame(width: 200, height: 200, alignment:
Alignment(horizontal: .hAlignment, vertical: VerticalAlignment.center))
.background(Color.pink)
}
extension HorizontalAlignment {
private enum HAlignment : AlignmentID {
static func defaultValue(in d: ViewDimensions) -> CGFloat {
return d[HorizontalAlignment.center]
}
}
static let hAlignment = HorizontalAlignment(HAlignment.self)
}
I made a custom modal using SwiftUI. It works fine, but the animation is wonky.
When played in slow motion, you can see that the ModalContent's background disappears immediately after triggering ModalOverlay's tap action. However, ModalContent's Text views stay visible the entire time.
Can anyone tell me how I can prevent ModalContent's background from prematurely disappearing?
Slow-mo video and code below:
import SwiftUI
struct ContentView: View {
#State private var isShowingModal = false
var body: some View {
GeometryReader { geometry in
ZStack {
Button(
action: { withAnimation { self.isShowingModal = true } },
label: { Text("Show Modal") }
)
ZStack {
if self.isShowingModal {
ModalOverlay(tapAction: { withAnimation { self.isShowingModal = false } })
ModalContent().transition(.move(edge: .bottom))
}
}.edgesIgnoringSafeArea(.all)
}
}
}
}
struct ModalOverlay: View {
var color = Color.black.opacity(0.4)
var tapAction: (() -> Void)? = nil
var body: some View {
color.onTapGesture { self.tapAction?() }
}
}
struct ModalContent: View {
var body: some View {
GeometryReader { geometry in
VStack {
Spacer()
VStack(spacing: 16) {
Text("Item 1")
Text("Item 2")
Text("Item 3")
}
.frame(width: geometry.size.width)
.padding(.top, 16)
.padding(.bottom, geometry.safeAreaInsets.bottom)
.background(Color.white)
}
}
}
}
The solution (thanks to #JWK):
It's probably a bug. It seems that, during the transition animation (when the views are disappearing) the zIndex of the two views involved (the ModalContent and the ModalOverlay) is not respected. The ModalContent (that is supposed to be in front of the ModalOverlay) is actually moved under the ModalOverlay at the beginning of the animation. To fix this we can manually set the zIndex to, for example, 1 on the ModalContent view.
struct ContentView: View {
#State private var isShowingModal = false
var body: some View {
GeometryReader { geometry in
ZStack {
Button(
action: { withAnimation { self.isShowingModal = true } },
label: { Text("Show Modal") }
)
ZStack {
if self.isShowingModal {
ModalOverlay(tapAction: { withAnimation(.easeOut(duration: 5)) { self.isShowingModal = false } })
ModalContent()
.transition(.move(edge: .bottom))
.zIndex(1)
}
}.edgesIgnoringSafeArea(.all)
}
}
}
}
The investigation that brings to a solution
Transition animations in SwiftUI have still some issues. I think this is a bug. I'm quite sure because:
1) Have you tried to change the background color of your ModalContent from white to green?
struct ModalContent: View {
var body: some View {
GeometryReader { geometry in
VStack {
Spacer()
VStack(spacing: 16) {
Text("Item 1")
Text("Item 2")
Text("Item 3")
}
.frame(width: geometry.size.width)
.padding(.top, 16)
.padding(.bottom, geometry.safeAreaInsets.bottom)
.background(Color.green)
}
}
}
}
This way it works (see the following GIF):
2) Another way to make the bug occur is to change the background color of your ContentView to, for example, green, leaving the ModalContent to white:
struct ContentView: View {
#State private var isShowingModal = false
var body: some View {
GeometryReader { geometry in
ZStack {
Button(
action: { withAnimation(.easeOut(duration: 5)) { self.isShowingModal = true } },
label: { Text("Show Modal") }
)
ZStack {
if self.isShowingModal {
ModalOverlay(tapAction: { withAnimation(.easeOut(duration: 5)) { self.isShowingModal = false } })
ModalContent().transition(.move(edge: .bottom))
}
}
}
}
.background(Color.green)
.edgesIgnoringSafeArea(.all)
}
}
struct ModalOverlay: View {
var color = Color.black.opacity(0.4)
var tapAction: (() -> Void)? = nil
var body: some View {
color.onTapGesture { self.tapAction?() }
}
}
struct ModalContent: View {
var body: some View {
GeometryReader { geometry in
VStack {
Spacer()
VStack(spacing: 16) {
Text("Item 1")
Text("Item 2")
Text("Item 3")
}
.frame(width: geometry.size.width)
.padding(.top, 16)
.padding(.bottom, geometry.safeAreaInsets.bottom)
.background(Color.white)
}
}
}
}
Even in this case it works as expected:
3) But if you change your ModalContent background color to green (so you have both the ContentView and the ModalContent green), the problem occurs again (I won't post another GIF but you can easily try it yourself).
4) Yet another example: if you change the appearance of you iPhone to Dark Appearance (the new feature of iOS 13) your ContentView will automatically become black and, since your ModalView is white, the problem won't occur and everything goes fine.