How Can I Wrap Text in a SwiftUI NavigationButton? - swiftui

SwiftUI's Text type has a modifier that allows text to wrap if the text is too long to fit horizontally within its container. To achieve text wrapping, simply pass nil as the argument to the lineLimit modifier:
Text("This text is too long to fit horizontally within its non-NavigationButton container. Therefore, it should wrap to fit, and it does.")
.font(.body)
.lineLimit(nil)
The above works as expected, except for when used inside of a SwiftUI NavigationButton. All Text instances that I have nested within NavigationButton instances do not wrap:
NavigationButton(destination: DestinationView()) {
Text("This text is too long to fit horizontally within its NavigationButton container. Therefore, it should wrap to fit, but it does not.")
.font(.body)
.lineLimit(nil)
}
Is there anything that I am missing from the code above that would allow Text instances to wrap within NavigationButton instances?
Edit to add more context:
The initial view is a List that is wrapped in a NavigationView. The List contains instances of MeasurableItemsListItem, which are wrapped in NavigationButton instances that trigger navigation to a secondary view that is added to the navigation stack:
struct MeasurableItemsList : View {
private let measurableItems = MeasurableItem.allCases
var body: some View {
NavigationView {
List(measurableItems.identified(by: \.self)) { measurableItem in
NavigationButton(destination: DosableFormsList(measurableItem: measurableItem)) {
MeasurableItemsListItem(measurableItem: measurableItem)
}
}
}
}
}
Each list item that is wrapped in a NavigationButton is made from the following structure:
struct MeasurableItemsListItem : View {
let measurableItem: MeasurableItem
var body: some View {
Text(measurableItem.name)
.font(.body)
.foregroundColor(.primary)
.lineLimit(nil)
}
}

You might be helped with this answer: https://stackoverflow.com/a/56604599/30602
The summary is that inside other Builders you need to add .fixedSize(horizontal: false, vertical: true) to your Text() to get it to wrap.

You don't need to use NavigationButton to achieve navigation. You can achieve it by using NavigationLink easily, wherein you don't need to wrap your views inside NavigationButton.
Check this ANSWER which is explaining the usage of NavigationLink without wrapping view inside it. I hope it helps.
P.S.- i don't have enough reputation points to add this as a comment. Thanks

Related

Turn off Accessibility altogether - Is it possible|?

Is there a way to turn off Accessibility modifiers altogether in the project so that even if the user turns on boild text etc it has no affect in the app?
I seen a link that shows a setting to turn off but i cant find it?
If want to prevent bold text, just use the .font modifier and supply a Font initialised using a UIFont, e.g.
struct ContentView: View {
var body: some View {
VStack {
Text("Some Text with UIFont")
.font(Font(UIFont.systemFont(ofSize: 14)))
Text("Some Text with Font")
.font(.system(size: 14))
}
}
}

SwiftUI: how can I hide scroll indicators? [duplicate]

I want to create a SwiftUI List, but not show scroll indicators. ScrollView offers showsIndicators to do this. How can it be done?
Any Indicators (List, scrollView, etc.)
you can get rid of showing indicators for all Lists, but with an API of the UITableView. because SwiftUI List is using UITableView for iOS behind the scene:
struct ContentView: View {
init() {
UITableView.appearance().showsVerticalScrollIndicator = false
}
var body: some View {
List(0...100, id: \.self) { item in
Text("hey")
}
}
}
Note that this will eliminate all TableViews and Lists indicators. You should make it visible again if you need to.
⚠️ Not Yet Important Note
Seems like Apple is removing appearance hacks (but not for this one yet). So you can use LazyVStack inside and ScrollView instead of List and use the available argument for hiding the indicators.
struct ContentView: View {
var body: some View {
ScrollView(.vertical, showsIndicators: false) { // <- This argument
LazyVStack {
ForEach(1...100, id: \.self) {
Text("\($0)").frame(height: 40)
}
}
}
}
}
It is actually easy to accomplish this without any appearance work arounds in the answer accepted. You just have to use the ScrollView initializer and set the parameter showsIndicators to false.
ScrollView(.vertical, showsIndicators: false) {
// ... your content for scrollView
}
Inside your ScrollView you could use LazyVStack, if you have a lot of subviews to scroll through. SwiftUI will then render very efficiently your subviews: "lazy" -> only if needed).
Until there is a native SwiftUI way to achieve this, the Introspect library provides a decent solution.
After applying all modifiers to your list just add as a last modifier the following:
List {
...
}
.introspectTableView { tableView in
tableView.showsVerticalScrollIndicator = false // here you can access any other UITableView property
}
I hope there is a native way to do that at some point.
Hide scrolling indicator now became very simple
List {}.scrollIndicators(ScrollIndicatorVisibility.hidden)
List basically creates a tableview (UpdateCoalescingTableView) behind the scenes, and tableview's are scrollable. Unfortunately, however, you can't get to the scrollview attributes in SwiftUI.
You "might" be able to create a UIViewRepresentable that could walk up the view hierarchy until it finds a scrollview, but I wouldn't recommend it.
You could also create your own scrollview, put a vstack inside it, and "fake" a list view, which would probably be the safer approach.
The choosen answer won't work in iOS 16. They released a new viewModifier called .scrollIndicators(.hidden). I created a viewModifier wrapper which you can call like this on your List: .modifier(HideListIndicatorsViewModifier())
struct HideListIndicatorsViewModifier: ViewModifier {
#ViewBuilder
func body(content: Content) -> some View {
if #available(iOS 16.0, *) {
content
.scrollIndicators(.hidden)
} else {
content
}
}
}
swift scrollview hide scrollbar
scrollView.showsHorizontalScrollIndicator = false
scrollView.showsVerticalScrollIndicator = false
hide scroll view indicators bar swiftui
ScrollView(.vertical, showsIndicators: false) {
// ... your content for scrollView
}

How to do Apple Music-like navigation in SwiftUI? Custom List and NavigationView has highlight not going away

This is my example that I am trying to get to work:
struct ContentView: View {
let links = ["Item 1", "Item 2", "Item 3", "Item 4"]
var body: some View {
NavigationView {
ScrollView {
Text("My Title")
List(links, id: \.self) {
link in
NavigationLink(destination: TestView()) {
Text(link)
.padding(.vertical, 4)
.frame(maxWidth: .infinity, alignment: .leading)
}
}
.frame(height: 178)
Text("Some more content here")
}
}
}
}
Note: TestView is just some view with the text hello world on it.
I am trying to copy Apple Music's style of navigation. I tried putting a Button in the NavigationLink but tapping it on the text wouldn't change views, and I couldn't find a way to reliably change the color of the row when tapped, at the same time. Also in some approach, I managed to make it work, but the way the colors animate is different, i.e. it fades from A to B, over ~100ms whereas what I'm trying to achieve is to animate between the states instantly (like in Apple Music).
My current approach is using a List, putting NavigationLinks inside it and then cutting off the whole view by giving it a height. This way I can put it alongside other content.
It's working fine for now, but whenever I click on an row and go back, the row is still highlighted, when it shouldn't. Is there a way to make it so that it deselects when going back to the screen somehow?
I think this bug is being caused by the List being inside a ScrollView, since when I removed ScrollView, the list worked properly, and there wasn't this highlight bug. But I need to be able to put my content with the list, and I don't intend to have a list take up the whole screen.
Is there any way to fix this bug with this approach? I'm also willing for other ways to achieve the same result without using List.
Trying to use ForEach instead ofList?
With a view for row (CustomRow) where you can pass link item and set custom dividing line, background etc ...
ForEach(links, id: \.self) { link in
NavigationLink(destination: TestView()) {
CustomRow(item: link)
}
}
.frame(height: 178)

Is there a way to hide scroll indicators in a SwiftUI List?

I want to create a SwiftUI List, but not show scroll indicators. ScrollView offers showsIndicators to do this. How can it be done?
Any Indicators (List, scrollView, etc.)
you can get rid of showing indicators for all Lists, but with an API of the UITableView. because SwiftUI List is using UITableView for iOS behind the scene:
struct ContentView: View {
init() {
UITableView.appearance().showsVerticalScrollIndicator = false
}
var body: some View {
List(0...100, id: \.self) { item in
Text("hey")
}
}
}
Note that this will eliminate all TableViews and Lists indicators. You should make it visible again if you need to.
⚠️ Not Yet Important Note
Seems like Apple is removing appearance hacks (but not for this one yet). So you can use LazyVStack inside and ScrollView instead of List and use the available argument for hiding the indicators.
struct ContentView: View {
var body: some View {
ScrollView(.vertical, showsIndicators: false) { // <- This argument
LazyVStack {
ForEach(1...100, id: \.self) {
Text("\($0)").frame(height: 40)
}
}
}
}
}
It is actually easy to accomplish this without any appearance work arounds in the answer accepted. You just have to use the ScrollView initializer and set the parameter showsIndicators to false.
ScrollView(.vertical, showsIndicators: false) {
// ... your content for scrollView
}
Inside your ScrollView you could use LazyVStack, if you have a lot of subviews to scroll through. SwiftUI will then render very efficiently your subviews: "lazy" -> only if needed).
Until there is a native SwiftUI way to achieve this, the Introspect library provides a decent solution.
After applying all modifiers to your list just add as a last modifier the following:
List {
...
}
.introspectTableView { tableView in
tableView.showsVerticalScrollIndicator = false // here you can access any other UITableView property
}
I hope there is a native way to do that at some point.
Hide scrolling indicator now became very simple
List {}.scrollIndicators(ScrollIndicatorVisibility.hidden)
List basically creates a tableview (UpdateCoalescingTableView) behind the scenes, and tableview's are scrollable. Unfortunately, however, you can't get to the scrollview attributes in SwiftUI.
You "might" be able to create a UIViewRepresentable that could walk up the view hierarchy until it finds a scrollview, but I wouldn't recommend it.
You could also create your own scrollview, put a vstack inside it, and "fake" a list view, which would probably be the safer approach.
The choosen answer won't work in iOS 16. They released a new viewModifier called .scrollIndicators(.hidden). I created a viewModifier wrapper which you can call like this on your List: .modifier(HideListIndicatorsViewModifier())
struct HideListIndicatorsViewModifier: ViewModifier {
#ViewBuilder
func body(content: Content) -> some View {
if #available(iOS 16.0, *) {
content
.scrollIndicators(.hidden)
} else {
content
}
}
}
swift scrollview hide scrollbar
scrollView.showsHorizontalScrollIndicator = false
scrollView.showsVerticalScrollIndicator = false
hide scroll view indicators bar swiftui
ScrollView(.vertical, showsIndicators: false) {
// ... your content for scrollView
}

Update UIViewRepresentable size from UIKit in SwiftUI

I'm embedding a view controller with variable-height UITextView inside a parent SwiftUI VStack and the view controller sizes it's frame to the whole screen between viewDidLoad and viewDidLayoutSubviews. The UITextView expands only to the size of the text inside itself and centers itself inside the parent view.
I'm trying to add this view controller in a VStack and have it behave externally like other SwiftUI components do - sized exactly to the content it contains - but it wants to be sized to the whole screen minus the other VStack elements.
I can get the correct size of the UITextView in didLayoutSubviews and pass it upwards to SwiftUI where it can be set properly - but where do I do that?
In the example screenshot below, the orange is the embedded UIView background, the green is the UITextView and the VStack looks like this:
VStack {
HighligherVC()
Text("Tap and drag to highlight")
.foregroundColor(.gray)
.font(.caption)
}
Without being able to see more of your code, it's slightly difficult to say what the best solution would be, but based purely on this part of your question...
I can get the correct size of the UITextView in didLayoutSubviews and pass it upwards to SwiftUI where it can be set properly - but where do I do that?
I would suggest that you pass a binding property to your view controller that can be set to the calculated text view height, meaning that the view that contains your VStack would have a #State property like this:
#State private var textViewHeight: CGFloat = 0
You would then declare a #Binding property on your HighlighterVC and add an initializer like this:
#Binding var textViewHeight: CGFloat
init(textViewHeight: Binding<CGFloat>) {
self._textViewHeight = textViewHeight
}
And then you would set textViewHeight to the calculated height in your didLayoutSubviews and add a .frame modifier to your HighlighterVC like this:
VStack {
HighlighterVC(textViewHeight: self.$textViewHeight)
.frame(height: self.textViewHeight)
Text("Tap and drag to highlight")
.foregroundColor(.gray)
.font(.caption)
}
Like I said at the beginning of my answer, this solution (that I believe would work, but since I can't test it, I'm not 100% certain) is based on your thoughts about what it is that you need. Without seeing more code, it's impossible for me to say if this is the best solution.
Add fixedSize may solve this.
.fixedSize(horizontal: false, vertical: true)