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Hi I have a Stack of Hstacks that consist of a Text and a slider. The slider width extends to the edge of the text in front of it but I want them all to have the same width and appear in a straight column.
Like this below.
This is how I am forming the stacks.
VStack {
ForEach(defensiveLayers.indices, id: \.self) { i in
HStack {
Text(defensiveLayers[i].name).font(.custom("Gill Sans", size: 12)).padding(.trailing).foregroundColor(.gray)
MyNodeView(myNode: $defensiveLayers[i])
}
}
}
this is the view where I am forming the sliders. Can someone pls help
struct MyNodeView : View {
#Binding var myNode : Sliders
var body: some View {
HStack {
Text("\(String(format: "%.f", myNode.percent))%").font(.footnote)
Slider(value: $myNode.percent, in: 0 ... 100)
}
}
}
To make sure all the text is the same width, the simplest way is .frame(width:).
struct Sliders {
var name = "Name"
var percent = CGFloat(100)
}
struct ContentView: View {
#State var defensiveLayers = [
Sliders(name: "Long name", percent: 80),
Sliders(name: "Name", percent: 70),
Sliders(name: "Ok name", percent: 65),
Sliders(name: "Hi", percent: 15),
Sliders(name: "Hello", percent: 45),
]
var body: some View {
VStack {
ForEach(defensiveLayers.indices, id: \.self) { i in
HStack {
Text(defensiveLayers[i].name).font(.custom("Gill Sans", size: 12)).padding(.trailing).foregroundColor(.gray)
.frame(width: 100) /// add frame here!
MyNodeView(myNode: $defensiveLayers[i])
}
}
}
}
}
struct MyNodeView : View {
#Binding var myNode: Sliders
var body: some View {
HStack {
Text("\(String(format: "%.f", myNode.percent))%").font(.footnote)
Slider(value: $myNode.percent, in: 0 ... 100)
}
}
}
Result:
You could calculate the required width for the longest Text and apply that particular width to all the leading Text views in all the HStacks unifying them in the width. I've created a helper method for finding the required width for any SwiftUI View.
Helper:
extension View {
func viewSize(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) { }
}
Usage:
#State private var textFrameWidth: CGFloat = 0
var body: some View {
VStack {
ForEach(defensiveLayers.indices, id: \.self) { i in
HStack {
Text(defensiveLayers[i].name)
.font(.custom("Gill Sans", size: 12))
.padding(.trailing)
.foregroundColor(.gray)
.viewSize { size in
textFrameWidth = textFrameWidth < size.width ? size.width : textFrameWidth
}
.frame(width: textFrameWidth)
MyNodeView(myNode: $defensiveLayers[i])
}
}
}
}
There are a lot of solutions for trying to align multiple images and text in SwiftUI using a HStacks inside of a VStack. Is there any way to do it for multiple Labels? When added in a list, multiple labels automatically align vertically neatly. Is there a simple way to do this for when they are embedded inside of a VStack?
struct ContentView: View {
var body: some View {
// List{
VStack(alignment: .leading){
Label("People", systemImage: "person.3")
Label("Star", systemImage: "star")
Label("This is a plane", systemImage: "airplane")
}
}
}
So, you want this:
We're going to implement a container view called EqualIconWidthDomain so that we can draw the image shown above with this code:
struct ContentView: View {
var body: some View {
EqualIconWidthDomain {
VStack(alignment: .leading) {
Label("People", systemImage: "person.3")
Label("Star", systemImage: "star")
Label("This is a plane", systemImage: "airplane")
}
}
}
}
You can find all the code in this gist.
To solve this problem, we need to measure each icon's width, and apply a frame to each icon, using the maximum of the widths.
SwiftUI provides a system called “preferences” by which a view can pass a value up to its ancestors, and the ancestors can aggregate those values. To use it, we create a type conforming to PreferenceKey, like this:
fileprivate struct IconWidthKey: PreferenceKey {
static var defaultValue: CGFloat? { nil }
static func reduce(value: inout CGFloat?, nextValue: () -> CGFloat?) {
switch (value, nextValue()) {
case (nil, let next): value = next
case (_, nil): break
case (.some(let current), .some(let next)): value = max(current, next)
}
}
}
To pass the maximum width back down to the labels, we'll use the “environment” system. For that, we need an EnvironmentKey. In this case, we can use IconWidthKey again. We also need to add a computed property to EnvironmentValues that uses the key type:
extension IconWidthKey: EnvironmentKey { }
extension EnvironmentValues {
fileprivate var iconWidth: CGFloat? {
get { self[IconWidthKey.self] }
set { self[IconWidthKey.self] = newValue }
}
}
Now we need a way to measure an icon's width, store it in the preference, and apply the environment's width to the icon. We'll create a ViewModifier to do those steps:
fileprivate struct IconWidthModifier: ViewModifier {
#Environment(\.iconWidth) var width
func body(content: Content) -> some View {
content
.background(GeometryReader { proxy in
Color.clear
.preference(key: IconWidthKey.self, value: proxy.size.width)
})
.frame(width: width)
}
}
To apply the modifier to the icon of each label, we need a LabelStyle:
struct EqualIconWidthLabelStyle: LabelStyle {
func makeBody(configuration: Configuration) -> some View {
HStack {
configuration.icon.modifier(IconWidthModifier())
configuration.title
}
}
}
Finally, we can write the EqualIconWidthDomain container. It needs to receive the preference value from SwiftUI and put it into the environment of its descendants. It also needs to apply the EqualIconWidthLabelStyle to its descendants.
struct EqualIconWidthDomain<Content: View>: View {
let content: Content
#State var iconWidth: CGFloat? = nil
init(#ViewBuilder _ content: () -> Content) {
self.content = content()
}
var body: some View {
content
.environment(\.iconWidth, iconWidth)
.onPreferenceChange(IconWidthKey.self) { self.iconWidth = $0 }
.labelStyle(EqualIconWidthLabelStyle())
}
}
Note that EqualIconWidthDomain doesn't just have to be a VStack of Labels, and the icons don't have to be SF Symbols images. For example, we can show this:
Notice that one of the label “icons” is an emoji in a Text. All four icons are laid out with the same width (across both columns). Here's the code:
struct FancyView: View {
var body: some View {
EqualIconWidthDomain {
VStack {
Text("Le Menu")
.font(.caption)
Divider()
HStack {
VStack(alignment: .leading) {
Label(
title: { Text("Strawberry") },
icon: { Text("🍓") })
Label("Money", systemImage: "banknote")
}
VStack(alignment: .leading) {
Label("People", systemImage: "person.3")
Label("Star", systemImage: "star")
}
}
}
}
}
}
This has been driving me crazy myself for a while. One of those things where I kept approaching it the same incorrect way － by seeing it as some sort of alignment configuration that was inside the black box that is List.
However it appears that it is much simpler. Within the List, Apple is simply applying a ListStyle － seemingly one that is not public.
I created something that does a pretty decent job like this:
public struct ListLabelStyle: LabelStyle {
#ScaledMetric var padding: CGFloat = 6
public func makeBody(configuration: Configuration) -> some View {
HStack {
Image(systemName: "rectangle")
.hidden()
.padding(padding)
.overlay(
configuration.icon
.foregroundColor(.accentColor)
)
configuration.title
}
}
}
This uses a hidden rectangle SFSymbol to set the base size of the icon. This is not the widest possible icon, however visually it seems to work well. In the sample below, you can see that Apple's own ListStyle assumes that the label icon will not be something significantly larger than the SFSymbol with the font being used.
While the sample here is not pixel perfect with Apple's own List, it's close and with some tweaking, you should be able to achieve what you are after.
By the way, this works with dynamic type as well.
Here is the complete code I used to generate this sample.
public struct ListLabelStyle: LabelStyle {
#ScaledMetric var padding: CGFloat = 6
public func makeBody(configuration: Configuration) -> some View {
HStack {
Image(systemName: "rectangle")
.hidden()
.padding(padding)
.overlay(
configuration.icon
.foregroundColor(.accentColor)
)
configuration.title
}
}
}
struct ContentView: View {
#ScaledMetric var rowHeightPadding: CGFloat = 6
var body: some View {
VStack {
Text("Lazy VStack Plain").font(.title2)
LazyVStack(alignment: .leading) {
ListItem.all
}
Text("Lazy VStack with LabelStyle").font(.title2)
LazyVStack(alignment: .leading, spacing: 0) {
vStackContent
}
.labelStyle(ListLabelStyle())
Text("Built in List").font(.title2)
List {
ListItem.all
labelWithHugeIcon
labelWithCircle
}
.listStyle(PlainListStyle())
}
}
// MARK: List Content
#ViewBuilder
var vStackContent: some View {
ForEach(ListItem.allCases, id: \.rawValue) { item in
vStackRow {
item.label
}
}
vStackRow { labelWithHugeIcon }
vStackRow { labelWithCircle }
}
func vStackRow<Content>(#ViewBuilder _ content: () -> Content) -> some View where Content : View {
VStack(alignment: .leading, spacing: 0) {
content()
.padding(.vertical, rowHeightPadding)
Divider()
}
.padding(.leading)
}
// MARK: List Content
var labelWithHugeIcon: some View {
Label {
Text("This is HUGE")
} icon: {
HStack {
Image(systemName: "person.3")
Image(systemName: "arrow.forward")
}
}
}
var labelWithCircle: some View {
Label {
Text("Circle")
} icon: {
Circle()
}
}
enum ListItem: String, CaseIterable {
case airplane
case people = "person.3"
case rectangle
case chevron = "chevron.compact.right"
var label: some View {
Label(self.rawValue, systemImage: self.rawValue)
}
static var all: some View {
ForEach(Self.allCases, id: \.rawValue) { item in
item.label
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
// .environment(\.sizeCategory, .extraExtraLarge)
}
}
Combining a few of these answers into another simple option (Very similar to some of the other options but thought it was distinct enough that some may find it useful). This has the simplicity of just setting a frame on the icon, and the swiftUI-ness of using LabelStyle but still adapts to dynamic type!
struct StandardizedIconWidthLabelStyle: LabelStyle {
#ScaledMetric private var size: CGFloat = 25
func makeBody(configuration: Configuration) -> some View {
Label {
configuration.title
} icon: {
configuration.icon
.frame(width: size, height: size)
}
}
}
The problem is that the system icons have different standard widths. It's probably easiest to use an HStack as you mentioned. However, if you use the full Label completion, you'll see that the Title is actually just a Text and the icon is just an Image... and you can then add custom modifiers, such as a specific frame for the image width. Personally, I'd rather just use an HStack anyway.
var body: some View {
VStack(alignment: .leading){
Label(
title: {
Text("People")
},
icon: {
Image(systemName: "person.3")
.frame(width: 30)
})
Label(
title: {
Text("Star")
},
icon: {
Image(systemName: "star")
.frame(width: 30)
})
Label(
title: {
Text("This is a plane")
},
icon: {
Image(systemName: "airplane")
.frame(width: 30)
})
}
}
I am trying to implement a tag list in SwiftUI but I'm unsure how to get it to wrap the tags to additional lines if the list overflows horizontally. I started with a string array called tags and within SwiftUI I loop through the array and create buttons as follows:
HStack{
ForEach(tags, id: \.self){tag in
Button(action: {}) {
HStack {
Text(tag)
Image(systemName: "xmark.circle")
}
}
.padding()
.foregroundColor(.white)
.background(Color.orange)
.cornerRadius(.infinity)
.lineLimit(1)
}
}
If the tags array is small it renders as follows:
However, if the array has more values it does this:
The behavior I am looking for is for the last tag (yellow) to wrap to the second line. I realize it is in an HStack, I was hoping I could add a call to lineLimit with a value of greater than one but it doesn't seem to change the behavior. If I change the outer HStack to a VStack, it puts each Button on a separate line, so still not quite the behavior I am trying create. Any guidance would be greatly appreciated.
Federico Zanetello shared a nice solution in his blog: Flexible layouts in SwiftUI.
The solution is a custom view called FlexibleView which computes the necessary Row's and HStack's to lay down the given elements and wrap them into multiple rows if needed.
struct _FlexibleView<Data: Collection, Content: View>: View where Data.Element: Hashable {
let availableWidth: CGFloat
let data: Data
let spacing: CGFloat
let alignment: HorizontalAlignment
let content: (Data.Element) -> Content
#State var elementsSize: [Data.Element: CGSize] = [:]
var body : some View {
VStack(alignment: alignment, spacing: spacing) {
ForEach(computeRows(), id: \.self) { rowElements in
HStack(spacing: spacing) {
ForEach(rowElements, id: \.self) { element in
content(element)
.fixedSize()
.readSize { size in
elementsSize[element] = size
}
}
}
}
}
}
func computeRows() -> [[Data.Element]] {
var rows: [[Data.Element]] = [[]]
var currentRow = 0
var remainingWidth = availableWidth
for element in data {
let elementSize = elementsSize[element, default: CGSize(width: availableWidth, height: 1)]
if remainingWidth - (elementSize.width + spacing) >= 0 {
rows[currentRow].append(element)
} else {
currentRow = currentRow + 1
rows.append([element])
remainingWidth = availableWidth
}
remainingWidth = remainingWidth - (elementSize.width + spacing)
}
return rows
}
}
Usage:
FlexibleView(
data: [
"Here’s", "to", "the", "crazy", "ones", "the", "misfits", "the", "rebels", "the", "troublemakers", "the", "round", "pegs", "in", "the", "square", "holes", "the", "ones", "who", "see", "things", "differently", "they’re", "not", "fond", "of", "rules"
],
spacing: 15,
alignment: .leading
) { item in
Text(verbatim: item)
.padding(8)
.background(
RoundedRectangle(cornerRadius: 8)
.fill(Color.gray.opacity(0.2))
)
}
.padding(.horizontal, model.padding)
}
Full code available at https://github.com/zntfdr/FiveStarsCodeSamples.
Ok, this is my first answer on this site, so bear with me if I commit some kind of stack overflow faux pas.
I'll post my solution, which works for a model where the tags are either present in a selectedTags set or not, and all available tags are present in an allTags set. In my solution, these are set as bindings, so they can be injected from elsewhere in the app. Also, my solution has the tags ordered alphabetically because that was easiest. If you want them ordered a different way, you'll probably need to use a different model than two independent sets.
This definitely won't work for everyone's use case, but since I couldn't find my own answer for this out there, and your question was the only place I could find mentioning the idea, I decided I would try to build something that would work for me and share it with you. Hope it helps:
struct TagList: View {
#Binding var allTags: Set<String>
#Binding var selectedTags: Set<String>
private var orderedTags: [String] { allTags.sorted() }
private func rowCounts(_ geometry: GeometryProxy) -> [Int] { TagList.rowCounts(tags: orderedTags, padding: 26, parentWidth: geometry.size.width) }
private func tag(rowCounts: [Int], rowIndex: Int, itemIndex: Int) -> String {
let sumOfPreviousRows = rowCounts.enumerated().reduce(0) { total, next in
if next.offset < rowIndex {
return total + next.element
} else {
return total
}
}
let orderedTagsIndex = sumOfPreviousRows + itemIndex
guard orderedTags.count > orderedTagsIndex else { return "[Unknown]" }
return orderedTags[orderedTagsIndex]
}
var body: some View {
GeometryReader { geometry in
VStack(alignment: .leading) {
ForEach(0 ..< self.rowCounts(geometry).count, id: \.self) { rowIndex in
HStack {
ForEach(0 ..< self.rowCounts(geometry)[rowIndex], id: \.self) { itemIndex in
TagButton(title: self.tag(rowCounts: self.rowCounts(geometry), rowIndex: rowIndex, itemIndex: itemIndex), selectedTags: self.$selectedTags)
}
Spacer()
}.padding(.vertical, 4)
}
Spacer()
}
}
}
}
struct TagList_Previews: PreviewProvider {
static var previews: some View {
TagList(allTags: .constant(["one", "two", "three"]), selectedTags: .constant(["two"]))
}
}
extension String {
func widthOfString(usingFont font: UIFont) -> CGFloat {
let fontAttributes = [NSAttributedString.Key.font: font]
let size = self.size(withAttributes: fontAttributes)
return size.width
}
}
extension TagList {
static func rowCounts(tags: [String], padding: CGFloat, parentWidth: CGFloat) -> [Int] {
let tagWidths = tags.map{$0.widthOfString(usingFont: UIFont.preferredFont(forTextStyle: .headline))}
var currentLineTotal: CGFloat = 0
var currentRowCount: Int = 0
var result: [Int] = []
for tagWidth in tagWidths {
let effectiveWidth = tagWidth + (2 * padding)
if currentLineTotal + effectiveWidth <= parentWidth {
currentLineTotal += effectiveWidth
currentRowCount += 1
guard result.count != 0 else { result.append(1); continue }
result[result.count - 1] = currentRowCount
} else {
currentLineTotal = effectiveWidth
currentRowCount = 1
result.append(1)
}
}
return result
}
}
struct TagButton: View {
let title: String
#Binding var selectedTags: Set<String>
private let vPad: CGFloat = 13
private let hPad: CGFloat = 22
private let radius: CGFloat = 24
var body: some View {
Button(action: {
if self.selectedTags.contains(self.title) {
self.selectedTags.remove(self.title)
} else {
self.selectedTags.insert(self.title)
}
}) {
if self.selectedTags.contains(self.title) {
HStack {
Text(title)
.font(.headline)
}
.padding(.vertical, vPad)
.padding(.horizontal, hPad)
.foregroundColor(.white)
.background(Color.blue)
.cornerRadius(radius)
.overlay(
RoundedRectangle(cornerRadius: radius)
.stroke(Color(UIColor.systemBackground), lineWidth: 1)
)
} else {
HStack {
Text(title)
.font(.headline)
.fontWeight(.light)
}
.padding(.vertical, vPad)
.padding(.horizontal, hPad)
.foregroundColor(.gray)
.overlay(
RoundedRectangle(cornerRadius: radius)
.stroke(Color.gray, lineWidth: 1)
)
}
}
}
}
I found this gist which once built, looks amazing! It did exactly what I needed for making and deleting tags. Here is a sample I built for a multi platform swift app from the code.
Tagger View
struct TaggerView: View {
#State var newTag = ""
#State var tags = ["example","hello world"]
#State var showingError = false
#State var errorString = "x" // Can't start empty or view will pop as size changes
var body: some View {
VStack(alignment: .leading) {
ErrorMessage(showingError: $showingError, errorString: $errorString)
TagEntry(newTag: $newTag, tags: $tags, showingError: $showingError, errorString: $errorString)
TagList(tags: $tags)
}
.padding()
.onChange(of: showingError, perform: { value in
if value {
// Hide the error message after a delay
DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
showingError = false
}
}
})
}
}
ErrorMessage View
struct ErrorMessage: View {
#Binding var showingError: Bool
#Binding var errorString: String
var body: some View {
HStack {
Image(systemName: "exclamationmark.triangle.fill")
.foregroundColor(.orange)
Text(errorString)
.foregroundColor(.secondary)
.padding(.leading, -6)
}
.font(.caption)
.opacity(showingError ? 1 : 0)
.animation(.easeIn(duration: 0.3), value: showingError)
}
}
TagEntry View
struct TagEntry: View {
#Binding var newTag: String
#Binding var tags: [String]
#Binding var showingError: Bool
#Binding var errorString: String
var body: some View {
HStack {
TextField("Add Tags", text: $newTag, onCommit: {
addTag(newTag)
})
.textFieldStyle(RoundedBorderTextFieldStyle())
Spacer()
Image(systemName: "plus.circle")
.foregroundColor(.blue)
.onTapGesture {
addTag(newTag)
}
}
.onChange(of: newTag, perform: { value in
if value.contains(",") {
// Try to add the tag if user types a comma
newTag = value.replacingOccurrences(of: ",", with: "")
addTag(newTag)
}
})
}
/// Checks if the entered text is valid as a tag. Sets the error message if it isn't
private func tagIsValid(_ tag: String) -> Bool {
// Invalid tags:
// - empty strings
// - tags already in the tag array
let lowerTag = tag.lowercased()
if lowerTag == "" {
showError(.Empty)
return false
} else if tags.contains(lowerTag) {
showError(.Duplicate)
return false
} else {
return true
}
}
/// If the tag is valid, it is added to an array, otherwise the error message is shown
private func addTag(_ tag: String) {
if tagIsValid(tag) {
tags.append(newTag.lowercased())
newTag = ""
}
}
private func showError(_ code: ErrorCode) {
errorString = code.rawValue
showingError = true
}
enum ErrorCode: String {
case Empty = "Tag can't be empty"
case Duplicate = "Tag can't be a duplicate"
}
}
TagList View
struct TagList: View {
#Binding var tags: [String]
var body: some View {
GeometryReader { geo in
generateTags(in: geo)
.padding(.top)
}
}
/// Adds a tag view for each tag in the array. Populates from left to right and then on to new rows when too wide for the screen
private func generateTags(in geo: GeometryProxy) -> some View {
var width: CGFloat = 0
var height: CGFloat = 0
return ZStack(alignment: .topLeading) {
ForEach(tags, id: \.self) { tag in
Tag(tag: tag, tags: $tags)
.alignmentGuide(.leading, computeValue: { tagSize in
if (abs(width - tagSize.width) > geo.size.width) {
width = 0
height -= tagSize.height
}
let offset = width
if tag == tags.last ?? "" {
width = 0
} else {
width -= tagSize.width
}
return offset
})
.alignmentGuide(.top, computeValue: { tagSize in
let offset = height
if tag == tags.last ?? "" {
height = 0
}
return offset
})
}
}
}
}
Tag View
struct Tag: View {
var tag: String
#Binding var tags: [String]
#State var fontSize: CGFloat = 20.0
#State var iconSize: CGFloat = 20.0
var body: some View {
HStack {
Text(tag.lowercased())
.font(.system(size: fontSize, weight: .regular, design: .rounded))
.padding(.leading, 2)
Image(systemName: "xmark.circle.fill")
.symbolRenderingMode(.palette)
.foregroundStyle(.red, .blue, .white)
.font(.system(size: iconSize, weight: .black, design: .rounded))
.opacity(0.7)
.padding(.leading, -5)
}
.foregroundColor(.white)
.font(.caption2)
.padding(4)
.background(Color.blue.cornerRadius(5))
.padding(4)
.onTapGesture {
tags = tags.filter({ $0 != tag })
}
}
}
And finally…
Context View
import SwiftUI
struct ContentView: View {
var body: some View {
TaggerView()
}
}
I can’t take any credit for the code but let me send a huge thanks to Alex Hay for creating and posting this.
Link to the gist code on GitHub
I hope this helps someone.
I can't use multiple NavigationLinks in the same row of a List.
It looks like the navigation stack is totally messed up, because you tap once and it goes to multiple views and back erratically...
in TestList, I've tried adding the separate NavigationLinks in Sections, and I've tried moving the NavigationLinks two different places in the view hierarchy...
I've tried adding two NavigationViews for each row of the list, but
then the navigationTitleBar don't go away when I need it to..
struct ContentView: View {
var body: some View {
NavigationView {
TestList()
}
}
}
struct TestList: View {
var body: some View {
List {
ListCellView()
}
}
}
struct ListCellView: View {
var body: some View {
VStack {
Spacer()
NavigationLink(destination: TestDestination1()) {
Text("Test Destination 1")
.frame(width: 140, height: 50)
.background(RoundedRectangle(cornerRadius: 7.0).strokeBorder(Color.green, lineWidth: 3.0))
}
Spacer()
NavigationLink(destination: TestDestination2()) {
Text("Test Destination 2")
.frame(width:140, height: 50)
.background(RoundedRectangle(cornerRadius: 7.0).strokeBorder(Color.purple, lineWidth: 3.0))
Spacer()
}
}
}
}
struct TestDestination1: View {
var body: some View {
Text("Test Destination 1")
}
}
struct TestDestination2: View {
var body: some View {
Text("Test Destination 2")
}
}
I expect that when you tap a NavigationLink, it will navigate to the destination view.
What happens is when two NavigationLinks are in the same row of a List and you tap in it, it will:
1. go to one of the views
2. After tapping 'back', it will take you back to the view AND THEN take you to the other destination view.
https://youtu.be/NCTnqjzJ4VE
As the others mentioned, why 2 NavigationLinks in 1 cell. The issue is with multiple buttons and gesture in general for the Cell. I guess it is expected 1 Button/NavigationLink max per cell. As you noticed, on your video, you tap on a NavigationLink but your full Cell got the gesture (highlighted), which in return impact the other Buttons/NavigationLinks.
Anyhow, you can have it working, the 2 NavigationLinks in 1 cell, with a hack. Below I have created SGNavigationLink, which I use for my own app which solve your issue. It simply replace NavigationLink and based on TapGesture, so you will lose the highlight.
NB: I slightly modified your ListCellView, as the Spacer within my SGNavigationLink was creating an internal crash.
struct ListCellView: View {
var body: some View {
VStack {
HStack{
SGNavigationLink(destination: TestDestination1()) {
Text("Test Destination 1")
.frame(width: 140, height: 50)
.background(RoundedRectangle(cornerRadius: 7.0).strokeBorder(Color.green, lineWidth: 3.0))
}
Spacer()
}
HStack{
SGNavigationLink(destination: TestDestination2()) {
Text("Test Destination 2")
.frame(width:140, height: 50)
.background(RoundedRectangle(cornerRadius: 7.0).strokeBorder(Color.purple, lineWidth: 3.0))
}
Spacer()
}
}
}
}
struct SGNavigationLink<Content, Destination>: View where Destination: View, Content: View {
let destination:Destination?
let content: () -> Content
#State private var isLinkActive:Bool = false
init(destination: Destination, title: String = "", #ViewBuilder content: #escaping () -> Content) {
self.content = content
self.destination = destination
}
var body: some View {
return ZStack (alignment: .leading){
if self.isLinkActive{
NavigationLink(destination: destination, isActive: $isLinkActive){Color.clear}.frame(height:0)
}
content()
}
.onTapGesture {
self.pushHiddenNavLink()
}
}
func pushHiddenNavLink(){
self.isLinkActive = true
}
}
I am not sure about why do you need multiple Navigationlinks (duplicate code). You can use a data source that will hold the required properties of the list [title, color, id etc] and based on the id, call the desired View. Reuse the same code. Here is an example.
struct TestList: View {
var body: some View {
List { // <- Use Data source
ForEach(0..<2) { index in
ListCellView(index: index)
}
}
}
}
struct ListCellView: View {
var index: Int
var body: some View {
return NavigationLink(destination: ViewFactory.create(index)) {
Text("Test Destination 1")
.frame(width: 140, height: 50)
.background(RoundedRectangle(cornerRadius: 7.0).strokeBorder(Color.green, lineWidth: 3.0))
}
}
}
class ViewFactory {
static func create(_ index: Int) -> AnyView {
switch index {
case 0:
return AnyView(TestDestination1())
case 1:
return AnyView(TestDestination2())
default:
return AnyView(EmptyView())
}
}
}
struct TestDestination1: View {
var body: some View {
Text("Test Destination 1")
}
}
struct TestDestination2: View {
var body: some View {
Text("Test Destination 2")
}
}
With a simple List in SwiftUI, how do I change/remove the standard background color for the section header
struct ContentView : View {
var body: some View {
List {
ForEach(0...3) { section in
Section(header: Text("Section")) {
ForEach(0...3) { row in
Text("Row")
}
}
}
}
}
}
No need to change appearance of all lists or do anything strange, just:
(Optional) Put .listStyle(GroupedListStyle()) on your List if you do not want sticky headers.
Set the listRowInsets on the section to 0.
Set the Section.backgroundColor to clear to remove the default color, or whatever color you want to color it.
Example:
List {
Section(header: HStack {
Text("Header")
.font(.headline)
.foregroundColor(.white)
.padding()
Spacer()
}
.background(Color.blue)
.listRowInsets(EdgeInsets(
top: 0,
leading: 0,
bottom: 0,
trailing: 0))
) {
// your list items
}
}.listStyle(GroupedListStyle()) // Leave off for sticky headers
The suggested solutions works until you decide to clear your List header background color.
Better solutions for List header custom color:
1.This solution effects all of the List sections in your app: (or move it to your AppDelegate class)
struct ContentView: View {
init() {
UITableViewHeaderFooterView.appearance().tintColor = UIColor.clear
}
var body: some View {
List {
ForEach(0 ..< 3) { section in
Section(header:
Text("Section")
) {
ForEach(0 ..< 3) { row in
Text("Row")
}
}
}
}
}
}
2.With this solution you can have custom List header background color for each list in your app:
struct ContentView: View {
init() {
UITableViewHeaderFooterView.appearance().tintColor = UIColor.clear
}
var body: some View {
List {
ForEach(0 ..< 3) { section in
Section(header:
HStack {
Text("Section")
Spacer()
}
.listRowInsets(EdgeInsets(top: 0, leading: 0, bottom: 0, trailing: 0))
.background(Color.blue)
) {
ForEach(0 ..< 3) { row in
Text("Row")
}
}
}
}
}
}
In beta 4, relativeWidth was deprecated. Code updated to reflect that.
Unfortunately, there's no quick parameter to set the background color. However, you can still do it:
import SwiftUI
struct ContentView : View {
var body: some View {
List {
ForEach(0...3) { section in
Section(header:
CustomHeader(
name: "Section Name",
color: Color.yellow
)
) {
ForEach(0...3) { row in
Text("Row")
}
}
}
}
}
}
struct CustomHeader: View {
let name: String
let color: Color
var body: some View {
VStack {
Spacer()
HStack {
Text(name)
Spacer()
}
Spacer()
}
.padding(0).background(FillAll(color: color))
}
}
struct FillAll: View {
let color: Color
var body: some View {
GeometryReader { proxy in
self.color.frame(width: proxy.size.width * 1.3).fixedSize()
}
}
}
I tried to use the custom header code above, and unfortunately could not get it to work in beta 6. That led me to the use of a ViewModifier:
public struct sectionHeader: ViewModifier{
var backgroundColor:Color
var foregroundColor:Color
public func body(content: Content) -> some View {
content
.padding(20)
.frame(width: UIScreen.main.bounds.width, height: 28,alignment:
.leading)
.background(backgroundColor)
.foregroundColor(foregroundColor)
}}
Which can be added to the sections in your list as follows:
struct ContentView: View {
#ObservedObject var service = someService()
var body: some View {
NavigationView {
List{
ForEach(someService.sections) {section in
Section(header: Text(section.title).modifier(sectionHeader(backgroundColor: Color(.systemBlue), foregroundColor: Color(.white)))){
Hope that helps somebody!
I was able to get the header to be clear (become white in my case) by using the custom modifiers. I needed to use listStyle() modifiers and all of the above didn't work for me.
Hope it helps someone else!
List {
Section(header: HStack {
Text("Header Text")
.font(.headline)
.padding()
Spacer()
}
) {
ForEach(0...3) { row in
Text("Row")
}
}
}.listStyle(GroupedListStyle()).listSeparatorStyle()
public struct ListSeparatorStyleModifier: ViewModifier {
public func body(content: Content) -> some View {
content.onAppear {
UITableView.appearance().separatorStyle = .singleLine
UITableView.appearance().separatorInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
UITableViewHeaderFooterView.appearance().tintColor = .clear
UITableView.appearance().backgroundColor = .clear // tableview background
UITableViewCell.appearance().backgroundColor = .clear
}
}
}
extension View {
public func listSeparatorStyle() -> some View {
modifier(ListSeparatorStyleModifier())
}
}
You have to use a rectangle combined with .listRowInsets on the view for your header section
Section(header: headerSectionView) {
Text("MySection")
}
private var headerSectionView: some View {
Rectangle()
.fill(Color.blue) // will make a blue header background
.listRowInsets(EdgeInsets(top: 0, leading: 0, bottom: 0, trailing: 0))
.overlay(
Text("My Section Title")
.padding(.horizontal), // You need this to add back the padding
alignment: .leading
)
}
I found a better solution
UITableViewHeaderFooterView.appearance().backgroundView = .init()
Since iOS 16 you could use the scrollContentBackground(_:) modifier.
Reference here
In your example:
struct ContentView : View {
var body: some View {
List {
ForEach(0...3) { section in
Section(header: Text("Section")) {
ForEach(0...3) { row in
Text("Row")
}
}
}
}
.scrollContentBackground(.hidden)
}
}
Another way you can do it by setting the frame of the header:
VStack {
List {
ForEach(0...3) { section in
Section(header:
Text("Section")
.frame(minWidth: 0, maxWidth: .infinity,alignment:.leading)
.background(Color.blue.relativeWidth(2))
) {
ForEach(0...3) { row in
Text("Row")
}
}
}
}
}