I was working on an app for macOS 12 but as Ventura came in, I wanted to upgrade to it and so get an app for macOS 13. I had to remove every single NavigationView as they are now deprecated, and replace them with NavigationSplitView or NavigationStack. Before adding it to my app, I tried using it on a POC and it did not went as I wanted too.
I am trying to get a NavigationSplitView with three columns (sidebar, content, detail) and tried to change the width of each columns, but it's half working. I did two buttons, one that makes the column bigger by 10 and on that makes it smaller by 10. As you can see if you try it, the width change is only working when I make the column bigger...
It is as simple as that :
struct ContentView: View {
#State private var visibility: NavigationSplitViewVisibility = .all
#State var columnWidth: CGFloat = 200
var body: some View {
NavigationSplitView(columnVisibility: $visibility) {
Text("Sidebar")
} content: {
Text("Content")
.navigationSplitViewColumnWidth(columnWidth)
} detail: {
Button {
columnWidth += 10
print(columnWidth)
} label: { Text("Bigger") }
Button {
columnWidth -= 10
print(columnWidth)
} label: { Text("Smaller") }
}
}
}
For info: Changing the column that gets edited & removing or changing the NavigationSplitViewVisibility doesn't change anything. Also it seems like there is a minimalWidth but I can't really find it.
Related
I would like to show/hide the 2nd column in a 3 column NavigationView layout on macOS. The toggle button does hide the content of the 2nd column – but I would like it to vanish completely, as if the user drags it away.
Any ideas?
struct ContentView: View {
#State private var showSecondColumn = true
var body: some View {
NavigationView {
// 1. Column / sidebar
List {
ForEach(0..<10) { i in
Text("Sidebar \(i)")
}
}
.listStyle(.sidebar)
// 2. Column - conditional
if showSecondColumn {
List {
ForEach(0..<10) { i in
Text("Second \(i)")
}
}
// .frame(width: showSecondColumn ? 150 : 0) // does not work either
}
// 3. Column / Content
Button(showSecondColumn ? "Hide second" : "Show second") {
withAnimation {
showSecondColumn.toggle()
}
}
}
}
}
I ran into this same issue for anyone else that comes across this. I found this article basically saying the amount of columns is fixed at compile time and cannot be changed dynamically.
A bit disappointing, but for what it's worth Apple's own notes app just has a blank third column when nothing is selected so I guess it's part of the design.
Looking for some advice trying to use Table on macOS using SwiftUI. Table was introduced in macOS 12, and I'm trying my darnedest to not step down into AppKit or replicate any existing functionality - I can't seem to find a solution to a SwiftUI version of NSTableView's rowHeight property.
There is a .tableStyle modifier but only allows for customization of insets and alternating row styling. Modifying the frame in the row views doesn't take effect, at least not the ways I've tried.
First, am I missing something obvious (or not obvious) and there is a way to do this? The underlying AppKit view is a SwiftUITableView that seems to inherit to NSTableView. I can adjust the rowHieght in the debugger, but only effects the table view's background. Second any recommendations on the way to approach this - other than using NSTableView and wrapping in a NSViewRepresentable, or manipulating the established NSView hierarchy using some SwiftUI/AppKit trickery?
Some elided code demonstrating the use of Table
struct ContentTable: View {
var items: [ContentItem]
#State var selection = Set<ContentItem.ID>()
var body: some View {
Table(selection: $selection) {
TableColumn("Name") {
Text($0.name)
.frame(height: 80) // Only way found to set height information
}.width(min: 200, ideal: 250)
TableColumn("Description", value: \.description)
} rows: {
ForEach(items) {
TableRow($0)
}
}
.tableStyle(.inset(alternatesRowBackgrounds: true))
}
}
Here's a side-by-side of SF Symbols (Left) and the SwiftUI Table I'm using. Both are using the inset/alternating row styles. Presentation wise I'd like to give the rows more space to breathe.
The way I do this is by utilizing the padding modifier in the content of declared TableColumns.
The important part is the table will adjust the row by the lowest padding value across all columns.
I would not try to approach this with tableStyle. There are no public configurations as of now.
It's important to note an undeclared padding defaults to 0.
struct ContentTable: View {
var items: [ContentItem]
#State var selection = Set<ContentItem.ID>()
var body: some View {
Table(selection: $selection) {
TableColumn("Name") {
Text($0.name).padding(.vertical, 8) // <--- THIS WILL TAKE PRECEDENCE.
}.width(min: 200, ideal: 250)
TableColumn("Description") {
Text("\($0.description)").padding(.vertical, 16) // <--- THIS WILL BE INEFFECTIVE.
}
} rows: {
ForEach(items) {
TableRow($0)
}
}
.tableStyle(.inset(alternatesRowBackgrounds: true))
}
}
When a SwitfUI TextField is disabled, on Mac OS, there is no visual feedback that the field is not enterable (apart from not accepting focus click). I have searched high and low, it looks like simply setting .background(Color.whatever) works for IOS (from all the "how tos" that I have encountered). However for a Mac OS app, it only changes the color of the thin boundary of the textfield. I have futzed around and found that I can add opaque overlays to simulate the effect, but that seems overly complex for what I always took to be conventional standard of greying out of disabled fields. Which makes me think that I am missing something bleedingly obvious somewhere.
Has anyone a sample of a MacOS SwiftUI struct that greys the background of a disabled TextField ? My minimal example of what I am doing to see the issue is below.
struct ContentView: View {
#State var nameEditDisabled = true
#State var myText = "Fred"
var body: some View {
VStack {
Button("Change Name") {
nameEditDisabled.toggle()
}
TextField("hello", text: $myText)
.background(nameEditDisabled ? Color.gray: Color.yellow)
.disabled(nameEditDisabled)
}
}
}
it seems to be "fixed' in swiftUI 3.0, macos 12. I get a slightly darker shade of gray when disabled. When in focus, I get a blue border.
Edit:
struct ContentView: View {
#State var nameEditDisabled = false
#State var myText = "Fred"
var body: some View {
VStack {
Button("Change disabling") {
nameEditDisabled.toggle()
}
TextField("hello", text: $myText)
.colorMultiply(nameEditDisabled ? .gray: .yellow)
.disabled(nameEditDisabled)
}.frame(width: 444, height: 444)
}
}
SwiftUI has wonderful animation features, but the way it handles changes in Text View content is problematic. It animates the change of the text frame but changes the text immediately without animation. As a result, when the content of a Text View is made longer, animating the transition causes an ellipsis (…) to appear until the text frame reaches its full width. For example, in this little app, pressing the Toggle button switches between shorter and longer text:
Here's the code:
import SwiftUI
struct ContentView: View {
#State var shortString = true
var body: some View {
VStack {
Text(shortString ? "This is short." : "This is considerably longer.").font(.title)
.animation(.easeInOut(duration:1.0))
Button(action: {self.shortString.toggle()}) {
Text("Toggle").padding()
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
The question is: how to avoid the ellipsis? When animating a one character string into a two character string the situation is even worse, because the short string is completely replaced by the ellipsis while it animates into the longer string.
One possibility is to assign a separate id to the view in one state or another by adding the modifier, for instance, .id(self.shortString ? 0 : 1) and then adding a .transition() modifier. That will treat the Text as two different Views, before and after. Unfortunately, in my case I need to move text location during the change, and different ids makes animating that impossible.
I guess the solution is a creative use of AnimatableData. Any ideas?
Here is a demo of possible approach (scratchy - you can redesign it to extension, modifier, or separate view)
Tested with Xcode 11.4 / iOS 13.4
struct ContentView: View {
#State var shortString = true
var body: some View {
VStack {
if shortString {
Text("This is short.").font(.title).fixedSize()
.transition(AnyTransition.opacity.animation(.easeInOut(duration:1.0)))
}
if !shortString {
Text("This is considerably longer.").font(.title).fixedSize()
.transition(AnyTransition.opacity.animation(.easeInOut(duration:1.0)))
}
Button(action: {self.shortString.toggle()}) {
Text("Toggle").padding()
}
}
}
}
Any suggestions for shrinking an animated gif's dimensions?
I use this way:
- decrease zoom of Preview to 75% (or resize window of Simulator)
- use QuickTimePlayer region-based Screen Recording
- use https://ezgif.com/video-to-gif for converting to GIF
If you add .animation(nil) to the Text object definition then the contents will change directly between values, avoiding ellipsis.
However, this may prevent the animation of the text location, which you also mention wanting to do simultaneously.
You can add one by one character into a string with animation after 0.1 seconds additional, but remember to disable the button toggle while the characters being added, like below:
Code:
public struct TextAnimation: View {
public init(){ }
#State var text: String = ""
#State var toggle = false
public var body: some View {
VStack{
Text(text).animation(.spring())
HStack {
Button {
toggle.toggle()
} label: {
Text("Toggle")
}
}.padding()
}.onChange(of: toggle) { toggle in
if toggle {
text = ""
"This is considerably longer.".enumerated().forEach { index, character in
DispatchQueue.main.asyncAfter(deadline: .now() + Double(index) * 0.1) {
text += String(character)
}
}
} else {
text = "This is short."
}
}
}
}
Here's a basic example of what doesn't work:
import SwiftUI
struct Test : View {
#State var swapped = false
var body: some View {
if swapped { Color.green }
Color.blue.tapAction {
withAnimation { self.swapped.toggle() }
}
if !swapped { Color.green }
}
}
SwiftUI has no way to figure out that I think of the first Color.green and the second Color.green as the same view, so of course the animation just fades one of them out while fading the other one in at the new location. I'm looking for the way to indicate to SwiftUI that these are the same view, and to animate it to the new location. I discovered the .id() modifier with great excitement because I believed that it would give me the effect that I want:
import SwiftUI
struct Test : View {
#State var swapped = false
var body: some View {
if swapped { Color.green.id("green") }
Color.blue.tapAction {
withAnimation { self.swapped.toggle() }
}
if !swapped { Color.green.id("green") }
}
}
This, unfortunately, does not work either. I'm unbelievably excited about SwiftUI, but it seems to me that the ability to change the structure of the view hierarchy while preserving view identity is quite important. The actual use case which prompted me to think about this is that I have a handful of views which I'm trying to create a fan animation for. The simplest way would be to have the items in a ZStack in one state so that they are all on top of each other, and then to have them in a VStack in the fanned out state, so that they're vertically spread out and all visible. Changing from a ZStack to a VStack of course counts as a change to the structure and therefore all continuity between the states is lost and everything just cross fades. Does anyone know what to do about this?
You can do this with SwiftUI 2 introduced in iOS 14 / macOS 10.16:
#Namespace private var animation
…
MyView.matchedGeometryEffect(id: "myID", in: animation)
I think I have the animation part of your question down, but unfortunately, I don't think it will keep the same instance of the view. I tried taking green out into a variable to see if that works, but if I understand SwiftUI correctly, that doesn't mean the same instance of the view will be shared in two places.
What I'm doing is adding a transition when the green view is added/removed. This way, the view moves to the location of its replacement before disappearing.
struct Test : View {
#State var swapped = false
let green = Color.green
var body: some View {
HStack {
if swapped {
green
.transition(.offset(CGSize(width: 200, height: 0)))
.animation(.basic())
}
Color.blue.animation(.basic()).tapAction {
withAnimation { self.swapped.toggle() }
}
if !swapped {
green.transition(.offset(CGSize(width: -200, height: 0)))
.animation(.basic())
}
}
}
}
This solution is quick-and-dirty and uses hard-coded values based on the iPhone 6/7/8 portrait screen size