I'm following SwiftUI tutorial to create my first app with SwiftUI but on TVOs and I don't know why but the scroll view item are with background color in grey, and when they are focussed they become white.
I don't find the way to change the color...
Can you help me please ?
My code :
struct LigneCategorie: View {
var nomCategorie: String
var items: [Recette]
var body: some View {
VStack(alignment: .leading) {
Text(self.nomCategorie)
.font(.headline)
.padding(.leading, 15)
.padding(.top, 5)
ScrollView(.horizontal, showsIndicators: false) {
HStack(alignment: .top) {
ForEach(self.items) { recette in
NavigationLink(
destination: RecetteDetail(
recette: recette
)
) {
CategoryItem(recette: recette)
}
}
}
}
.frame(height: 185)
}
}
}
struct CategoryItem: View {
var recette: Recette
var body: some View {
VStack(alignment: .leading) {
recette.image
.renderingMode(.original)
.resizable()
.frame(width: 200, height: 150)
.cornerRadius(10)
Text(recette.name)
.foregroundColor(.primary)
.font(.caption)
}
.padding(.leading, 15)
}
}
Thank you
You can set your school view's background in a preview side. when you click your scroll view you would see a chosen scroll view in preview mode Font,color and similar options must to be appear. But if not, then try this it should be useful.
ScrollView(.horizontal, showsIndicators: false) {
}.color(.gray)
Related
How can I pin a view element to the bottom of a scrollview/VStack in SwiftUI? I've tried using spacers but that doesn't seem to be working. I need the 'Footer' text to be at the bottom of the scroll view/Vstack, how can I do that?
struct ContentView: View {
var body: some View {
VStack {
ScrollView(.vertical, showsIndicators: false) {
VStack(alignment: .leading) {
Text("Top Title")
Text("Body")
Spacer()
Text("Footer") // SHOULD BE PINNED TO BOTTOM OF SCROLL VIEW
.frame(alignment: .bottom)
}
}
.background(Color.red)
Button("Done") {
//some action
}
}
}
}
Here is possible approach:
ScrollView(.vertical, showsIndicators: false) {
VStack(alignment: .leading) {
Text("Top Title")
Text("Body")
}
}
.overlay(
Text("Footer")
, alignment: .bottom) // << here !!
Guess 2: probably you wanted this
GeometryReader { gp in
ScrollView(.vertical, showsIndicators: false) {
VStack(alignment: .leading) {
Text("Top Title")
Text("Body")
Spacer()
Text("Footer") // SHOULD BE PINNED TO BOTTOM OF SCROLL VIEW
.frame(alignment: .bottom)
}
.frame(maxWidth: .infinity, minHeight: gp.size.height)
}
.background(Color.red)
}
You are properly looking for the safeAreaInset modifier: https://developer.apple.com/documentation/swiftui/menu/safeareainset(edge:alignment:spacing:content:)-1dqob/
I'd like to implement an animation in SwiftUI that "reveals" the content of a view to enable expand/collapse functionality. The content of the view I want to collapse and expand is complex: It's not just a simple box, but it's a view hierarchy of dynamic height and content, including images and text.
I've experimented with different options, but it hasn't resulted in the desired effect. Usually what happens is that when I "expand", the whole view was shown right away with 0% opacity, then gradually faded in, with the buttons under the expanded view moving down at the same time. That's what happened when I was using a conditional if statement that actually added and removed the view. So that makes sense.
I then experimented with using a frame modifier: .frame(maxHeight: isExpanded ? .infinity : 0). But that resulted in the contents of the view being "squished" instead of revealed.
I made a paper prototype of what I want:
Any ideas on how to achieve this?
Something like this might work. You can modify the height of what you want to disclose to be 0 when hidden or nil when not so that it'll go for the height defined by the views. Make sure to clip the view afterwards so the contents are not visible outside of the frame's height when not disclosed.
struct ContentView: View {
#State private var isDisclosed = false
var body: some View {
VStack {
Button("Expand") {
withAnimation {
isDisclosed.toggle()
}
}
.buttonStyle(.plain)
VStack {
GroupBox {
Text("Hi")
}
GroupBox {
Text("More details here")
}
}
.frame(height: isDisclosed ? nil : 0, alignment: .top)
.clipped()
HStack {
Text("Cancel")
Spacer()
Text("Book")
}
}
.frame(maxWidth: .infinity)
.background(.thinMaterial)
.padding()
}
}
No, this wasn't trying to match your design, either. This was just to provide a sample way of creating the animation.
Consider the utilization of DisclosureGroup. The following code should be a good approach to your idea.
struct ContentView: View {
var body: some View {
List(0...20, id: \.self) { idx in
DisclosureGroup {
HStack {
Image(systemName: "person.circle.fill")
VStack(alignment: .leading) {
Text("ABC")
Text("Test Test")
}
}
HStack {
Image(systemName: "globe")
VStack(alignment: .leading) {
Text("ABC")
Text("X Y Z")
}
}
HStack {
Image(systemName: "water.waves")
VStack(alignment: .leading) {
Text("Bla Bla")
Text("123")
}
}
HStack{
Button("Cancel", role: .destructive) {}
Spacer()
Button("Book") {}
}
} label: {
HStack {
Spacer()
Text("Expand")
}
}
}
}
The result looks like:
I coded this in under 5 minutes. So of course the design can be optimized to your demands, but the core should be understandable.
import SwiftUI
struct TaskViewCollapsible: View {
#State private var isDisclosed = false
let header: String = "Review Page"
let url: String
let tasks: [String]
var body: some View {
VStack {
HStack {
VStack(spacing: 5) {
Text(header)
.font(.system(size: 22, weight: .semibold))
.foregroundColor(.black)
.padding(.top, 10)
.padding(.horizontal, 20)
.frame(maxWidth: .infinity, alignment: .leading)
Text(url)
.font(.system(size: 12, weight: .regular))
.foregroundColor(.black.opacity(0.4))
.padding(.horizontal, 20)
.frame(maxWidth: .infinity, alignment: .leading)
}
Spacer()
Image(systemName: self.isDisclosed ? "chevron.up" : "chevron.down")
.padding(.trailing)
.padding(.top, 10)
}
.onTapGesture {
withAnimation {
isDisclosed.toggle()
}
}
FetchTasks()
.padding(.horizontal, 20)
.padding(.bottom, 5)
.frame(height: isDisclosed ? nil : 0, alignment: .top)
.clipped()
}
.background(
RoundedRectangle(cornerRadius: 8)
.fill(.black.opacity(0.2))
)
.frame(maxWidth: .infinity)
.padding()
}
#ViewBuilder
func FetchTasks() -> some View {
ScrollView(.vertical, showsIndicators: true) {
VStack {
ForEach(0 ..< tasks.count, id: \.self) { value in
Text(tasks[value])
.font(.system(size: 16, weight: .regular))
.foregroundColor(.black)
.padding(.vertical, 0)
.frame(maxWidth: .infinity, alignment: .leading)
}
}
}
.frame(maxHeight: CGFloat(tasks.count) * 20)
}
}
struct TaskViewCollapsible_Previews: PreviewProvider {
static var previews: some View {
TaskViewCollapsible(url: "trello.com", tasks: ["Hello", "Hello", "Hello"])
}
}
in my code I have this:
var body: some View {
NavigationView {
VStack(spacing: 0) {
ScrollView(.vertical, showsIndicators: false) {
VStack(spacing: 18) {
ScrollView(.horizontal, showsIndicators: false){
HStack(spacing: 20){
Text("teste")
.frame(height: 180)
.frame(width: 330)
.background(Color.blue)
.cornerRadius(15)
Text("teste")
.frame(height: 180)
.frame(width: 330)
.background(Color.green)
.cornerRadius(15)
Text("teste")
.frame(height: 180)
.frame(width: 330)
.background(Color.pink)
.cornerRadius(15)
}.padding(.horizontal, 12)
}
ForEach(specialtyList, id: \.type){ specialty in
NavigationLink (destination: SearchBar(item: specialty)){
VStack(spacing: 18) {
HStack{
Text(specialty.type).foregroundColor(.white)
specialty.image
.renderingMode(.original)
.resizable()
.frame(width: 35, height: 35)
}.frame(minWidth: 0, idealWidth: 350, maxWidth: .infinity)
.frame(height: 100)
}
}.padding(.horizontal)
.background(specialty.color).cornerRadius(45)
}.padding(.horizontal)
}
.padding(.top)
.padding(.bottom)
}
}.navigationBarTitle("Buscar")
}.accentColor(.black)
}
I want that, according to the button that is pressed in ForEach, the tittle of the next view is the name of the button. Now, the name displaying in every button is "Buscar"
I've tried to implement, after ForEach and before NavigationLink, a NavigationView, but the hole ForEach disappears. Basically, I want that the Text(specialty.type) that is pressed is the name of the navigation bar back button. Any ideas?
Here is a demo of possible approach - the idea is to change navigation bar title on the navigation link activation and reset on back.
Demo prepared & tested with Xcode 12 / iOS 14
struct DemoView: View {
#State private var barTitle = ""
#State private var selectedType = ""
#State private var isActive = false
let types = ["Type1", "Type2", "Type3"]
var body: some View {
NavigationView {
VStack {
ForEach(types, id: \.self) { type in
Button(type) {
self.isActive = true
self.selectedType = type
self.barTitle = type // comment for variant 2
}
}
}
.background(
NavigationLink(destination:
Text(selectedType)
// .onAppear { self.barTitle = self.selectedType } // variant 2
, isActive: $isActive) { EmptyView() }
)
.navigationBarTitle(barTitle)
.onAppear {
self.barTitle = "Buscar"
}
}
}
}
I am unsure how to fix this. I have implemented a ScrollView and a NavigationView with ZStacks. However, the automatic display mode doesn't work and the ScrollView sits behind it, with the Title overlapping.
https://i.stack.imgur.com/KPkGh.png
https://i.stack.imgur.com/H8NwS.png
Here is my current code:
struct Overview: View {
var body: some View {
ZStack{
NavigationView {
ZStack {
Color.init("Background")
.navigationBarHidden(false)
.navigationBarTitle("Overview", displayMode: .automatic)
.edgesIgnoringSafeArea(.top)
ScrollView(showsIndicators: false) {
VStack(spacing: 10) {
ForEach(0..<10) {
Text("Item \($0)")
.foregroundColor(.white)
.font(.largeTitle)
.frame(width: 340, height: 200)
.background(ColorManager.BoxColor)
.cornerRadius(10)
}
}
.frame(maxWidth: .infinity)
}
}
}
}
}
}
var body: some View {
NavigationView {
ScrollView(showsIndicators: false) {
VStack(spacing: 10) {
ForEach(0..<10) {
Text("Item \($0)")
.foregroundColor(.blue)
.font(.largeTitle)
.frame(width: 340, height: 200)
.background(Color(.gray))
.cornerRadius(10)
}
}
.frame(maxWidth: .infinity)
}
.navigationBarHidden(false)
.navigationBarTitle("Overview", displayMode: .automatic)
}
}
You had the navigation item in a ZStack. A ZStack is used to display overlapping views on top of each other.
I believe what you really were looking to achieve stacking the title above the scrollView. That would be achieved with VStack. That however, would still be wrong.
Because it's a navigational setting, it goes inline with the NavigationView. So it can be displayed in the NavigationBar. It doesn't need to be apart of any Stacks.
I created a modal but it seems to have a bug on the selection. When scrolling the left, it scrolls the right, I have to go to the very edge of the left to be able to scroll, this is how it looks:
import SwiftUI
struct ContentView: View {
#State var showingModal = false
#State var hours: Int = 0
#State var minutes: Int = 0
var body: some View {
ZStack {
VStack {
Button("Show me"){
self.showingModal = true
}
if $showingModal.wrappedValue {
VStack(alignment: .center) {
ZStack{
Color.black.opacity(0.4)
.edgesIgnoringSafeArea(.vertical)
// this one is it
VStack(spacing: 20) {
Text("Time between meals")
.bold().padding()
.frame(maxWidth: .infinity)
.background(Color.yellow)
.foregroundColor(Color.white)
HStack {
Spacer()
VStack {
Picker("", selection: $hours){
ForEach(0..<4, id: \.self) { i in
Text("\(i) hours").tag(i)
}
}
.frame(width: 150, height: 120)
.clipped()
}
VStack {
Picker("", selection: $minutes){
ForEach(0..<60, id: \.self) { i in
Text("\(i) min").tag(i)
}
}
.frame(width: 150, height: 120)
.clipped()
}
}
Spacer()
Button(action: {
self.showingModal = false
}){
Text("Close")
} .padding()
}
.frame(width:300, height: 300)
.background(Color.white)
.cornerRadius(20).shadow(radius: 20)
}
}
}
}
}
}
}
How can I fix that little bug? I tried playing around with the layout but no use... any help would be appreciated
What if I told you the reason your Picker not working was this line?
.cornerRadius(20).shadow(radius: 20)
Unfortunately, SwiftUI is still quite buggy and sometimes it doesn't do what it is supposed to do and especially Pickers are not that reliable. I guess we'll need to wait and see the next iteration of SwiftUI, but for now you can replace that line with the code below:
.mask(RoundedRectangle(cornerRadius: 20))
.shadow(radius: 20)
There are just modifiers which affect all view hierarchy (ie. all subviews) that can change resulting layout/presentation/behaviour. And .cornerRadius and .shadow are such type modifiers.
The solution is to apply (as intended) those modifiers only to entire constructed view, and here it is
.compositingGroup() // <<< fix !!
.cornerRadius(20).shadow(radius: 20)
where .compositionGroup is intended to make above view hierarchy flat rendered and all below modifiers applied to only to that flat view.