I am developing a MacOS app using SwiftUI and would like a Picker to shrink to only show its label and content, and a Spacer to take up the rest of the view, but I'm not sure what the correct way to do this. The code looks something like this:
HStack{
Text("hello")
Text("more text")
Spacer()
Picker(selection: self.$stuff, label: Text("some stuff:")) {
ForEach(0 ..< self.getStuff().count) {
Text(self.getStuff()[$0])
}
}
}
and the Picker is expanded to take up as much room as possible. I would prefer that the picker take up the minimum amount of space and the Spacer to take up the remaining space.
Edit: photo:
You can use .scaledToFit to fit it to content as below
Picker(selection: self.$stuff, label: Text("some stuff:")) {
ForEach(0 ..< self.getStuff().count) {
Text(self.getStuff()[$0])
}
}
.scaledToFit()
// .frame(width: 160) // < alternate approach - give explicit desired width
Related
NavigationView{
List{
VStack{
Text("EdwardCullen")
.padding(.vertical, -20)
AsyncImage(url)) { image in
image
.center()
} placeholder: {
ProgressView()
}
}
Text("Test")
}
.navigationTitle("EdwardCullen's Profile")
.navigationBarTitleDisplayMode(.inline)
}
Picture of what I want
I included a picture of what I want kind of, so basically "Status" on the left side of the Text and "Online" on the total other side. I also would preferably want "Online" to be green, so I think I need to use two different Text views, but how exactly would I do this in a list? Is there any good way to do this?
The way I did what is in the picture is just adding many spaces to Text like this, but obviously that is not very smart and also not exactly what I want.
Text("First Second")
Use HStack{} plus Spacer(). (Code is below the image)
var body: some View {
VStack {
HStack {
Text("First")
Spacer() //this one
Text("Second")
}
.padding()
.background(.blue)
.cornerRadius(15)
}
}
Use a spacer "Spacer()". This is an adaptive view that expands as much as it can.
NavigationView{
List{
VStack{
Text("EdwardCullen")
.padding(.vertical, -20)
AsyncImage(url)) { image in
image
.center()
} placeholder: {
ProgressView()
}
}
# new code here
HStack {
Text("Status")
Spacer()
Text("Online")
.foregroundColor(.green)
}
}
.navigationTitle("EdwardCullen's Profile")
.navigationBarTitleDisplayMode(.inline)
}
Just Use a HStack and put a spacer between two text .
sample code :
HStack{
Text("Status")
Spacer()
Text("Online")
}.cornerRadius(8)
you may use this anywhere you want .
Sample Output:
I want to create a complication rendered by a SwiftUI View that contains a label and a timer value.
I want the label to be on the complication background layer, and the timer value to be on the complication foreground layer so that they get tinted separately.
I would like this line of text, comprised of 2 parts, to be centered.
The trouble is, when using Text.DateStyle.timer, the Text behaves differently within a complication vs in a normal view.
In a normal view the Text frame behaves as any other text, only taking the space it needs.
When displayed in a complication, the Text frame expands to fill all the space it can, and the text within is left aligned.
This makes it so I cannot find a way to center the group of 2 Texts.
I tried a somewhat hacky approach with infinite spacers to try to steal the extra space from the Text that has the expanding frame. This works to center the content, but it causes the Text to truncate.
HStack {
Text("T:")
.foregroundColor(.accentColor)
Text(Date(), style: .timer)
.complicationForeground()
}
HStack {
Spacer()
.frame(maxWidth: .infinity)
HStack {
Text("T:")
.foregroundColor(.accentColor)
Text(Date(), style: .timer)
.complicationForeground()
}
Spacer()
.frame(maxWidth: .infinity)
}
A normal preview:
A preview of rendering within complication:
CLKComplicationTemplateGraphicExtraLargeCircularView(
ExtraLargeStack()
)
.previewContext(faceColor: .multicolor)
Edit to show full code
import ClockKit
import SwiftUI
struct ExtraLargeStack: View {
var body: some View {
VStack(alignment: .center) {
HStack {
Text("T:")
.foregroundColor(.accentColor)
Text(Date(), style: .timer)
.complicationForeground()
}
HStack {
Spacer()
.frame(maxWidth: .infinity)
HStack {
Text("T:")
.foregroundColor(.accentColor)
Text(Date(), style: .timer)
.complicationForeground()
}
Spacer()
.frame(maxWidth: .infinity)
}
}
.font(.system(size: 18, weight: .regular))
.lineLimit(1)
}
}
struct ExtraLargeStack_Previews: PreviewProvider {
static var previews: some View {
/// Preview normal view
// ExtraLargeStack()
/// Preview as Complication
CLKComplicationTemplateGraphicExtraLargeCircularView(
ExtraLargeStack()
)
.previewContext(faceColor: .multicolor)
}
}
Edit: Another partial solution
Based on suggestions from #Yrb, an overlay provides a partial solution that may be good enough for my use case.
The following does not fully center the 2 part line, but it is pretty close.
HStack {
// Use placeholder text to create a view with the appropriate size for _most_ timer values that I need to support
Text("L: 00:00 ").hidden()
}
.overlay(
// overlay the real content, which is constrained to the frame created by the hidden placeholder.
HStack(spacing: 5) {
Text("L:")
.foregroundColor(.accentColor)
Text(Date() - 3599, style: .timer)
.complicationForeground()
}
)
So, I figured out what the issue with aligning Text(Date(), style: .timer) is. The timer format from hours on down. The document give this as an example: 2:59 36:59:01. It appears that .timer reserves all of the possible space it needs and then is formatted on that possible space, not the space actually used. There does not appear to be any way to change this behavior, even if your goal is a 5 minute countdown timer.
I think you need to consider slight UI change. I did find that you can change the alignment of the displayed Text with a .timer by using .multilineTextAlignment(), but that is about all you can do. The following code demonstrates this:
struct ExtraLargeStack: View {
var body: some View {
// I removed (alignment: .center) as it is redundant. VStacks default to center
VStack {
// I put the negative spacing to tighten the T: with the timer
VStack(spacing: -6) {
Text("T:")
.foregroundColor(.accentColor)
Text(Date(), style: .timer)
// If you center with .multilineTextAlignment the timer
// will be centered
.multilineTextAlignment(.center)
.complicationForeground()
}
HStack {
HStack {
Text(Date(), style: .timer)
.multilineTextAlignment(.center)
.complicationForeground()
.overlay(
Text("T:")
.foregroundColor(.accentColor)
// This offset would need to be computed
.offset(x: -30, y: 0)
)
}
}
}
.font(.system(size: 18, weight: .regular))
}
}
I left the second timer as an HStack, but I put your Text("T") as an .overlay() with a .offset(). I don't particularly like this as it will be fragile if you attempt to adjust the offset for the additional time units, but if you have a limited range, it may work well enough. Also, if you use .monospaced on the timer text, the computation should be a linear amount.
I would like to get the separator in SwiftUI, but I didn't find the way. This was screenshot from mail.app.
If your view elements are in a HStack (like your mail.app suggest) using Divider() will give you a vertical "separator".
Elsewhere Divider() will give you a horizontal "separator".
You can adjust its size, like this: Divider().frame(width: 123)
You can of course do more things with Dividers, such as set its thickness or height with different color:
HStack {
Divider().frame(width: 5, height: 50).background(Color.blue)
Image(systemName: "line.3.horizontal.decrease.circle")
Divider().frame(width: 10, height: 100).background(Color.pink)
Image(systemName: "envelope")
Divider().frame(width: 15, height: 150).background(Color.green)
}
Here is the right way of doing such thing, do not use Divider, because it has lots of issues. With Divider you cannot control the thickness, also it has issue with updating color, wired Xcode complain in console in some cases, also space issue, it takes more space than it needs. In general it does not worth to use it.
struct ContentView: View {
var body: some View {
HStack {
Group {
Image(systemName: "mail")
Capsule().fill(Color.secondary).frame(width: 2.0)
Image(systemName: "trash")
}
.frame(width: 25, height: 25)
}
}
}
One alternative solution that may be more useful in some cases (e.g if you want a customisable toolbar the accepted solution won't work):
ToolbarItem (placement: .primaryAction) {
HStack {
Divider()
}
}
Added on the 24th of July:
This line of code fixes the space in the detail view. However... in the list view the title has become a lot smaller too.
.navigationBarTitle(Text("Egg management"), displayMode: .inline)
Added on the 23th of July:
Thanks to the tips I made a lot of progress. Especially the tip to add borders does wonders. You see exactly what happens!
However, there seems to be a difference between the Xcode Preview canvas, the simulator and the physical device. Is this a bug because -after all- it is still beta? Or is there anything I can do?
As you can see in the images... only in the Xcode Preview canvas the view connects to the top of the screen.
I believe it has something to do with the tabbar. Since when I look at the Xcode Preview canvas with the tabbar... that space above is also there. Any idea how to get rid of that?
Original postings:
This is my code for a detailed list view:
import SwiftUI
struct ContentDetail : View {
#State var photo = true
var text = "Een kip ..."
var imageList = "Dag-3"
var day = "3.circle"
var date = "9 augustus 2019"
var imageDetail = "Day-3"
var weight = "35.48"
var body: some View {
VStack (alignment: .center, spacing: 10) {
Text(date)
.font(.title)
.fontWeight(.medium)
ZStack (alignment: .topLeading){
Image(photo ? imageDetail : imageList)
.resizable()
.aspectRatio(contentMode: .fit)
.background(Color.black)
.padding(.trailing, 0)
.tapAction {
self.photo.toggle() }
HStack {
Image(systemName: day)
.resizable()
.padding(.leading, 10)
.padding(.top, 10)
.frame(width: 40, height: 32)
.foregroundColor(.white)
Spacer()
Image(systemName: photo ? "photo" : "pencil.circle")
.resizable()
.padding(.trailing, 10)
.padding(.top, 10)
.frame(width: 32, height: 32)
.foregroundColor(.white)
}
}
Text(text)
.lineLimit(6)
.frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
.padding(.leading, 6)
} .padding(20)
}
}
#if DEBUG
struct ContentDetail_Previews : PreviewProvider {
static var previews: some View {
ContentDetail()
}
}
#endif
Also included is the preview canvas. What I don't get is how I can make sure the text and photo are aligned to the top (instead of the middle). I tried with Spacers, padding etc.
I must be overseeing something small I guess... but. Can somebody point me in the right direction? Thanks.
Added:
After both answers I added a Spacer() after the last text. In Xcode in the preview canvas everything looks okay now. But on my connected iPhone 7 Plus there are some problems: the view is not aligned to the top, and the image is cropped (icon on the right is gone; white banding to the right).
Adding a Spacer() after the last text shifts everything to the top. Tested on iPhone Xr simulator (not preview).
...
Text(text)
.lineLimit(6)
.frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
.padding(.leading, 6)
Spacer()
}
To remove the space at the top:
VStack {
...
}
.padding(20)
.navigationBarTitle("TITLE", displayMode: .inline)
Think in terms of what a Spacer() does. It "moves" the views as far apart as it can - at least, without a specific space.
So you have this:
VStack {
Text
ZStack {
Image
HStack {
Image
Spacer()
Image
}
}
Text
}
All told, going from inner to outer, you have a horizontal stack of two images placed as far apart (the spacer is between them) inside of a "Z axis" stack that places an image on top of them, inside of a vertical stack that has some text above it.
So if you want to move everything in that vertical stack to the top, you simply need to add one last spacer:
VStack {
Text
ZStack {
Image
HStack {
Image
Spacer()
Image
}
}
Text
Spacer() // <-- ADD THIS
}
Last note: Don't be afraid to adding additional "stacks" to your view. In terms of memory footprint, it's really just a single view with no performance hit.
EDIT: I took your original view and changed everything to placeholders...
var body: some View {
VStack (alignment: .center, spacing: 10) {
Text("Text #1")
.font(.title)
.fontWeight(.medium)
ZStack (alignment: .topLeading) {
Text( "Image #1")
HStack {
Text("Image #2")
Spacer()
Text("Image #3")
}
}
Text("Text #2")
.lineLimit(6)
.frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
.padding(.leading, 6)
} .padding(20)
}
As expected, everything is vertically centered. Adding a Spacer() below "Text #2" throws everything to the top. A couple of thoughts:
Starting there, and add in your Image views one by one. Add in the modifiers like that also.
I don't have the specific images you are rendering, so maybe put a noticeable background color on various things (orange is my personal favorite) and see if the top Image is actually on top but the image makes it appear as though it isn't. A border would work pretty well too.
I'm trying to center a bunch of views in a VStack within a ScrollView in SwiftUI. To simplify things, I'm just trying to get it to work with a single Text view. Here's what I've come up with so far:
var body: some View {
ScrollView(alwaysBounceVertical: true){
HStack(alignment: .center) {
Spacer()
Text("This Is a Test")
Spacer()
} //HStack
.background(Color.green)
} //ScrollView
.background(Color.gray)
}
This results in this:
I want the text to be in the middle like this:
So the HStack should be full-width and the Text should be centered within it. It seems like this should be easy, but I don't get what I'm doing wrong. :)
Using GeometryReader, you can get information about the size of the containing view and use that to size your view.
var body: some View {
GeometryReader { geometry in <--- Added
ScrollView(alwaysBounceVertical: true){
HStack(alignment: .center) {
Spacer()
Text("This Is a Test")
Spacer()
} //HStack
.frame(width: geometry.size.width) <--- Added
.background(Color.green)
} //ScrollView
.background(Color.gray)
}
}
edit: after looking into this more, it seems that part of the problem is that you are using a ScrollView. If you remove that parent, the spacers in the HStack will automatically cause stretching to fill the view. I'm guessing the automatic stretching doesn't happen in ScrollViews because there's no finite limit to how big it can be, how much would it stretch? (because a ScrollView can scroll in any direction)
This seems to be a bug in Xcode 11.0 beta, ScrollView content wouldn't fill the scroll view. If you replace the ScrollView with a List it will work as expected. But if you have to use a scroll view, one workaround is to fix the scroll view's content width.
So your code will look something like this:
ScrollView(alwaysBounceVertical: true) {
HStack(alignment: .center) {
Spacer()
Text("This Is a Test")
Spacer()
} // HStack
.frame(width: UIScreen.main.bounds.width) // set a fixed width
.background(Color.green)
} // ScrollView
.background(Color.gray)
Result:
You should use the modifier frame and set its maxWidth: .infinity.
So it tells its parent: "the wider, the better" :)
var body: some View {
ScrollView(.vertical, showsIndicators: true){
HStack(alignment: .center) {
Spacer()
Text("This Is a Test")
.frame(maxWidth: .infinity) // <- this
Spacer()
} //HStack
.background(Color.green)
} //ScrollView
.background(Color.gray)
}
And this works regardless its parent.
Scrollview or whatever View it's set in.
Paul is doing a great job clarifying it to all of us here:
https://www.hackingwithswift.com/quick-start/swiftui/how-to-give-a-view-a-custom-frame
Answer compatible with Xcode 12.1 (12A7403)
I hope this helps 👍
dsa