I'm trying to code a simple layout design with SwiftUI without success!
Here's what I'd like to do:
ScrollView {
VStrack {
// Header with an orange background.
// This orange color should also apply to the status bar.
}
VStrack {
// Content with a white background.
// This white color should always go to the bottom.
}
}
I first tried to apply an orange background to the first VStack and a white background to the second VStack but I couldn't color the status bar in orange even with .ignoresSafeArea().
Then I tried to apply an orange background to the ScrollView and a white background again to the second VStack but I couldn't color the bottom of the screen in white even with .infinity.
I also tried to use LazyVStack but nothing happened.
Do you guys have any idea to make this works? :-)
You can try setting the height of the content to be at least the screen height:
.frame(minHeight: UIScreen.screenHeight)
Here's the sample code of the full view's body (you can replace the HStacks with VStacks, as long as you fill the width):
ScrollView {
HStack {
Spacer()
Text("Header")
Spacer()
}
.padding()
.background(.orange)
HStack {
Spacer()
Text("Content")
Spacer()
}
.padding()
.frame(minHeight: UIScreen.screenHeight, alignment: .top)
.background(.white)
}
.background(Color.orange.ignoresSafeArea(.all, edges: .top))
Related
I like to scale an image on macOS with a pinch - gesture, which works well.
But the image is scaled always (and expectingly) centers.
What I need is that an Image is scaled with an anchor on the mousepointer. But I have no clue how to read the current mousePointer position.
What I have so far is:
GeometryReader { geo in
ScrollView([.horizontal, .vertical], showsIndicators: true) {
Image(nsImage: image!)
.resizable()
.scaledToFill()
.animation(.default)
**// Here the 'anchor' should have a pointer position **
.scaleEffect(setZoom(magnificationLevel: magnificationState.scale), anchor: UnitPoint.center)
.frame(width: geo.size.width, height: geo.size.height)
.onAppear() {
self.imageMagnificationState = CGFloat(1.0)
}
}
}
Is there any snippet for this every day task? How to get the cursor position? SwiftUI doc is very lame here.
I want to make a scrolling app with a gradient background. As user scrolls - background color changes.
For example, the bottom is black and the top is white I would specify the height of a VStack for 8000, and for this height, as the user scrolls the screen he will see the color change.
I didn't find any solution. Tried making LinearGradient for VStack and Rectangle figures for its full height, but it only covers the phone screen size (can't fill all 8000 height points). So if I scroll upwards, the gradient is lost and it only displays the black screen.
Thank you]1
You can achieve this using a rectangle within a ZStack:
struct ContentView: View {
var body: some View {
ScrollView {
ZStack(alignment: .top) {
// Example width and height. Width should be the width of the device
Rectangle().frame(width: 10000, height: 2000).foregroundColor(.clear).background(LinearGradient(gradient: Gradient(colors: [.white, .black]), startPoint: .top, endPoint: .bottom))
// Add your actual content here:
Text("Yeet")
}
}
}
}
I am trying to increase the touchable area of a button inside a NavigationView. It does not work even though the area is made bigger. My code is below:
var body: some View {
NavigationView {
List(taskStore.tasks) { tasks in
Text(tasks.name)
}
.navigationBarTitle("Tasks")
.navigationBarItems(
trailing: Button(action: {
self.modalIsPresented = true
}){
Image(systemName: "plus")
.frame(width: 200, height: 200)
.contentShape(Rectangle())
.background(Color.yellow)
})}
The green area is touchable and the red area isn't touchable.
I found a solution online that works. However this solution only works for a button that is NOT in the NavigationView. So if I put the button in "some view" like the following below, it works as per the solution:
var body: some View {
Button(action: {self.modalIsPresented = true} ) {
Text("Default padding")
.padding(50)
.background(Color.yellow)
}}}
But when I put the button in a Navigation View like my code, the yellow area is not touchable. How can I get the whole yellow area (red box) to be touchable like the solution?
Thanks :D
Example of solution:
If you want a button in the navigation bar, it is only going to be clickable inside the navigation bar, no matter what you try to set the image's frame at, and the NavigationView determines that height, no matter what the children- the button, in this case- may want.
Historically, changing the height of the NavigationBar has not been supported: see the comments here
Now you could do something funky with ZStacks- put a button on top of the navigation view, perhaps- but you're not going to be able to put anything larger than the set height inside the navigation bar.
I think you may find your desired effect inside the .navigationBarItems(trailing:) if you use .contentShape(Rectangle()) modifier. Or you could use other shapes to suit your needs. Then adjust the size of the .frame to adjust the tappable area as desired. Here is a quick code example.
struct ContentView: View {
var body: some View {
NavigationView {
List {
Text("Hello, World")
}
.navigationBarTitle(Text("Items"))
.navigationBarItems(trailing: Button(action: {
print("Do Something")
}, label: {
Image(systemName: "plus")
.frame(width: 100, height: 50)
.contentShape(Rectangle())
.border(Color.red, width: 3)
.background(Color.gray)
}))
}
}
}
I hope this helps.
I am having an issues in swiftui when creating a button or navigationlink using an image as the button. Once I get the code setup the image is blue.
NavigationView {
VStack {
Text("Hello World")
NavigationLink(destination: areaexample()) {
Image("testpic")
.resizable()
.frame(width: 200, height: 200)
.cornerRadius(50)
}
}
}
Some components in iOS automatically apply a caller called tint. If you need to override this behavior, Set the rendering mode of the image to .renderingMode(.original)
Image("testpic").renderingMode(.original)
I'm using SwiftUI on MACOS
If I do this:
Button(action: { } ) {
Text("Press")
.padding()
.background(Color.blue)
}
I get this:
and the two grey areas are the ends of a tappable button.
but I would expect the button to be the shape of the blue area.
Any ideas how I can get the whole blue area to be tappable.
(I did look at using .onTapGesture but this doesn't animate the button so that you know you've tapped it.)
You can achieve the look you want by using a ButtonStyle and then specifying colors and other style attributes based on the configuration values being passed in.
It would be nice if there was a happy medium where you could inherit the default button radius, automatic width based on the text length and other attributes, but at least there is the ability to specify all the attributes and get the look you want.
Hope this helps!
import SwiftUI
struct BlueButtonStyle: ButtonStyle {
func makeBody(configuration: Self.Configuration) -> some View {
configuration.label
.foregroundColor(configuration.isPressed ? Color.blue : Color.white)
.background(configuration.isPressed ? Color.white : Color.blue)
.cornerRadius(6.0)
.padding()
}
}
struct ContentView: View {
var body: some View {
VStack {
Text("Hello World")
.frame(maxWidth: .infinity, maxHeight: .infinity)
Button(action: {
}) {
Text("Press")
.frame(maxWidth: 100, maxHeight: 24)
}
.buttonStyle(BlueButtonStyle())
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
Inspired by #Gene Z. Ragan 's great answer I've started with that answer and taken this a bit further:
Making the ButtonStyle a bit more flexible:
struct NiceButtonStyle: ButtonStyle {
var foregroundColor: Color
var backgroundColor: Color
var pressedColor: Color
func makeBody(configuration: Self.Configuration) -> some View {
configuration.label
.font(.headline)
.padding(10)
.foregroundColor(foregroundColor)
.background(configuration.isPressed ? pressedColor : backgroundColor)
.cornerRadius(5)
}
}
and then some sugar to make it cleaner at the call site:
extension View {
func niceButton(
foregroundColor: Color = .white,
backgroundColor: Color = .gray,
pressedColor: Color = .accentColor
) -> some View {
self.buttonStyle(
NiceButtonStyle(
foregroundColor: foregroundColor,
backgroundColor: backgroundColor,
pressedColor: pressedColor
)
)
}
}
then means we can use default colouring:
white foreground, grey background and accentedColor pressedColor
Button(action: { } ) {
Text("Button A")
}
.niceButton()
or we can customise the colours:
Button(action: { } ) {
Text("Button B has a long description")
}
.niceButton(
foregroundColor: .blue,
backgroundColor: .yellow,
pressedColor: .orange
)
And we get:
Thanks again Gene.
I raised this with Apple on the Feedback assistant to see if they had any useful thoughts.
Dialogue here:
I said:
If on MACOS with SwiftUI I do this:
Button(action: { } ) {
Text("Press")
.padding()
.background(Color.blue)
}
I get a blue box with two grey bits sticking out the sides.
Image attached.
These are the two grey areas are the ends of a tappable button. but I would expect the button to be the shape of the blue area.
The same code works fine as expected on iOS.
(I did look at using .onTapGesture but this doesn't animate the button so that you know you've tapped it.)
Apple said:
iOS and macOS have different default ButtonStyles — iOS is borderless, macOS has that standard bezel effect.
It sounds like you’re trying to create a custom ButtonStyle (and so not have any system provided chrome). So you’ll want to create that, which can apply that blue background to the label of the button, and then apply that to your simple button with Text, e.g.
Button("Press"), action {}).buttonStyle(BluePaddingButtonStyle()
This will ensure that it has the same appearance on every platform you run it on.
I said:
Hi, Thanks for the explanation.
I get what you are saying and I’m ok with the method I’ve come up with.
It still doesn’t seem right that:
Button(action: { } ) {
Text("Press")
.padding()
.background(Color.blue)
}
should produce something so odd looking.
I don’t understand why that bit of code couldn’t just produce a blue button.
As I say - it’s not a problem because I’ve worked around it but it
currently doesn’t seem intuitive.
Apple said:
The provided content inside the ViewBuilder is used as the label of the button: not the entire button. The button will still come with the surrounding background, bezel, foreground styling, etc as described by it’s ButtonStyle. So if your button needs to have a very specific appearance, then it needs to customize that style: either to the BorderlessButtonStyle (though note that still does come with a specific foreground appearance style), or to a custom ButtonStyle.
My thoughts:
This did help me understand why it shows as it does but intuitively it still seems wrong !!!
You can "force" an iOS-like behavior on macOS by adding .buttonStyle(.borderless).
Button(action: { } ) {
Text("Press")
.padding()
.background(Color.blue)
}
.buttonStyle(.borderless)
I don't think this is possible but you could try using this
Supports SPM, is build for Swift 5.1 and is lean
In Swift 5, this could be achieved with below simple code -
Button("First Button") {
print("Hello World")
}
.padding(10)
.accentColor(.yellow)
.background(Color.blue)
.cornerRadius(10)