I'm using SwiftUI's Link to open Safari from the application. But I have a long text for the link.
What is the problem
For now, the second line of the text always keeps aligned at the center.
What I want
I want to be able to use leading TextAlignment with it.
So I've tried to use multilineTextAlignment but didn't work.
Code
Link("Some long text even very looong even that long text here!", destination: URL(string: "https://www.apple.com/")!)
.multilineTextAlignment(.leading)
Need help.
Solution
My solution was using another signature of the Link itself with multilineTextAlignment.
Link(destination: URL(string: "https://www.apple.com/")!) {
Text("Some long text even very looong even that long text here!")
.multilineTextAlignment(.leading)
}
From Apple Documentation
public struct Link<Label> : View where Label : View {
/// Creates a control, consisting of a URL and a label, used to navigate
/// to the given URL.
///
/// - Parameters:
/// - destination: The URL for the link.
/// - label: A view that describes the destination of URL.
public init(destination: URL, #ViewBuilder label: () -> Label)
Hope will help someone else!
Best
Related
I'm curious, is there a way to make the fonts in a view match those of an existing view in SwiftUI? I don't like the default selections of swiftUI in a certain context, and I'd like some control over the situation.
Here's some code to illustrate:
struct FontMatchView: View {
var body: some View {
Form {
Section {
Text("Some Controls Here")
} header: {
HStack {
Text("Header")
Spacer()
Button("Option") {
}
}
}
}
}
}
This gives this result:
In the Section Header, I'd like the font in the button on the right (with label "OPTION") to match the label to its left ("HEADER"). I'm guessing this will be hard because the font is not known at the time of view definition. But the choices SwiftUI has made here are "clearly wrong" :-), and I need to fix this.
Is there a way we solve this (other than overriding both fonts)? Ideally, I could say "use a font that is 0.8 x the height of whatever font will be used in view X". But I'd settle for "use the same font as will be used in view X".
You can remove "buttonizing" (which includes adjusting the font) by applying .buttonStyle(.plain). This will make it match the other Text in the current context. If you then want to re-accent it, you may:
Button("Option") {}
.buttonStyle(.plain)
.foregroundColor(.accentColor)
That said (and somewhat unrelated), making the button as small as the HEADER text may make it uncomfortably small as a hit area. It may be better to make HEADER larger rather than OPTION smaller.
I have a phone / iPad application. It would be useful to export text, images, or other data to other apps or other devices.
I can export the colour data as text using UIpasteboard.general.string. This works nicely. The Universal pasteboard lets me paste into other devices.
I can export an image using UIpasteboard.general.image. I have a PNG image in my bundle resources. I can the paste it into Preview or some other image viewer. I would like to be able to paste it as a file but I can't see how to do that at the other end.
I have also a PDF manual in the Bundle. It would be nice to export that too. Like the previous image, it would be nice to paste it as a file but I cannot see how this is done.
Before I get into the code, is UIpasteboard the right way to do this? Or is there some other approach I ought to be using rather than trying to fix this. What do other apps do?
Grid(horizontalSpacing: 3, verticalSpacing:3) {
GridRow {
Text("Text: ").gridColumnAlignment(.trailing).foregroundColor(.gray)
Button {
let pasteboard = UIPasteboard.general
pasteboard.string = toString(sw: sd.mySwatch)
} label: {
Text("Current swatch").lineLimit(1).frame(width:buttonW)
}.buttonStyle(.bordered)
}
GridRow {
Text("Text: ").gridColumnAlignment(.trailing).foregroundColor(.gray)
Button {
var reply: String = ""
for sw in sd.swatches {
reply = reply + toString(sw: sw)
}
UIPasteboard.general.string = reply
} label: {
Text("All swatches").lineLimit(1).frame(width:buttonW)
}.buttonStyle(.bordered)
}
GridRow {
Text("Image: ").gridColumnAlignment(.trailing).foregroundColor(.gray)
Button {
UIPasteboard.general.image = UIImage(contentsOfFile: Bundle.main.path(forResource: "Macbeth", ofType: "png")!)
} label: {
Text("Macbeth.png").lineLimit(1).frame(width:buttonW)
}.buttonStyle(.bordered)
}
GridRow {
Text("PDF: ").gridColumnAlignment(.trailing).foregroundColor(.gray)
Button {
UIPasteboard.general.url = Bundle.main.url(forResource: "ByEye", withExtension: "pdf")!
} label: {
Text("ByEye.pdf").lineLimit(1).frame(width:buttonW)
}.buttonStyle(.bordered)
}
}
That is my code. The first three options work. The last one does not because the URL is a private one for the application. I might be able to copy the file to a public directory so the URL worked but that seems like the wrong way to go about it.
Postscript:
This actually works well enough for now. I can copy stuff to the pasteboard, then paste it into an e-mail or other message to myself. This lets me get stuff out of the app without creating temporary files the I have to clean up.
I did not find a solution for the PDF or other files. I was hoping for something like this...
UIPasteboard.general.file = UIImage(contentsOfFile: Bundle.main.path(forResource: "manual", ofType: "pdf")!)
...but nothing like that exists as far as I can tell.
I'm starting to learn swiftui and I've run into a problem that is both very basic and easily solvable in UIKit; but after spending days searching the internet and watching WWDC videos I've found no native solution.
The premise is simple: I have an array of songs I want to display in a list; when a user taps on a song view it should highlight the view on press, unhighlight after release, and then play the song (ie trigger an action). Sounds simple right?
Here's what I tried and spent way too much time on:
Using List(selection) + .onEvent(changed): I end up with a UUID (because i've only gotten selection to work with a UUID) that I then have to check against an array of songs to match AND the cell won't unhighlight/select itself; even when I try to manually set the State variable to nil or another generated UUID.
Using .onTap (either on or in the cell): I have to tap on the text of the cell to trigger onTap so I get a lot of taps that just don't work (because I have lots of white space in the cell). I also don't get a nice UI color change on press/release.
So after spending hours trying many different things I've finally come up with a solution and I basically wanted to create an account and share it to hopefully help other developers in my position. Because this so very annoyed me that something so basic took so much effort and time to do.
In the end the best solution I came up with was this:
Using ZStack and an empty button:
edit: I found I need to include and hide the content otherwise the button doesn't grow to fill the space (seems in lists it does for some reason). Though not sure what the hit on performance is of rendering the content twice when hiding it. Maybe a GeometryReader would work better?
struct SelectionView: ViewModifier {
let onSelect: () -> Void
func body(content: Content) -> some View {
ZStack (alignment: .leading) {
Button {
onSelect()
} label: {
content
.hidden()
}
content
}
}
}
extension View {
func onSelection(_ selection: #escaping () -> Void) -> some View {
self.modifier(SelectionView(onSelect: selection))
}
}
then to use it:
SongCell(song: song)
.onSelection {
// Do whatever action you want
}
No messing around with list selection, no weird tap hit boxes, and get the press/release color change. Basically put an empty button in a ZStack and trigger off it's action. Could possibly cause tap/touch issues with more complicated cells (?) but it does exactly what I need it to do for my basic app. I'm just not sure why it took so much effort and why apple doesn't support such a basic use case by default? If I've overlooked something native please do inform me. Thanks.
I got the basic idea what you are trying to do. I'm Going to show simple example. Maybe using this you will be able to find proper solution.
First let's create a color : -
#State var colorToShow : Color = Color.blue
Now in body we have our ZStack or Your cell that we want to deal with : -
ZStack{
colorToShow
}.frame(width: 50, height: 50).padding()
.onLongPressGesture(minimumDuration: 3) {
print("Process Complete")
colorToShow = .green
} onPressingChanged: { pressing in
if pressing {
print("Pressing")
colorToShow = .red
} else {
print("Pressing Released")
colorToShow = .blue
}
}
Here we are using .onLongPressGesture. You can set minimum duration on which you want to perform action. Now on process completion You set what you want to do. OnPressingChange give you a bool value that changes according to user is pressing that button or not. Show color change(Highlight) or do action while bool value is true. When user release button do action or unhighlight since bool value turns false.
Hope you find it useful.
maybe a absolute beginner question:
In the following code is foregroundColor working but .textSelection doesn't. What is the reason?
Text("This is a Test")
.foregroundColor(isSelectable ? .green : .red)
.textSelection(isSelectable ? .enabled : .disabled)
We cannot put it ternary operator, because .enabled and .disabled are of different concrete types (confirming to one protocol), so possible variant is
let text = "This is a Test"
Group {
if isSelectable {
Text(text)
.textSelection(.enabled)
} else {
Text(text)
.textSelection(.disabled)
}
}
.foregroundColor(isSelectable ? .green : .red)
Note: actually Apple does not consider this feature as togglable, let's read the doc
/// A selectability value that enables text selection by a person using your app.
///
/// Enabling text selection allows people to perform actions on the text
/// content, such as copying and sharing. Enable text selection in views
/// where those operations are useful, such as copying unique IDs or
/// error messages. This allows people to paste the data into
/// emails or documents.
It's hardly imaginable that "useful informations electability" can be turned of for some reason. Just in case.
When specifying a minimumScaleFactor for a TextField in SwiftUI the TextField behaves normally while you enter text and reduces the font as specified when the content does not fit the TextView. However, if you start deleting characters everything works as usual until you delete the first character. Everything freezes.
At the beginning I though it was something in the way I was handling the variable that stores the text that in my application I have it as an ObservedObject. However, after debugging the frozen app I noticed that the code was circling around the drawing of the TextField over and over, function after function everything pointed to an error in the drawing of the object on the screen.
The following code illustrates the issue. The TextField works perfectly when you enter characters and delete them until you get to the first one. The it freezes.
import SwiftUI
struct ContentView: View {
#State var sensorNumber: String = ""
var body: some View {
TextField("WC0.000.000.000", text: $sensorNumber)
.padding(.all, 5.0)
.font(Font.custom("Helvetica", size:40.0))
.minimumScaleFactor(0.90)
}
}
The problem seems to be related to the interaction of the Custom Font. Obviously, my application is using custom fonts but here I just wanted to simplify the code.
This code does not fail if you don't use a custom font or if you don't specify a minimumScaleFactor. I have found a workaround that is not very elegant but it works until Apple fixes this bug:
import SwiftUI
struct ContentView: View {
#State var sensorNumber: String = ""
var body: some View {
TextField("WC0.000.000.000", text: $sensorNumber)
.padding(.all, 5.0)
.font(Font.custom("Helvetica", size:40.0))
.minimumScaleFactor(sensorNumber.count < 2 ? 1.0 : 0.90)
}
}
I am submitting a radar to Apple but looking for a better solution for the problem here.