In iOS 16, there are now new SwiftUI modifiers for adjusting navigation bars.
The following:
struct ContentView: View {
var body: some View {
NavigationStack {
Rectangle()
.fill(.red)
.frame(width: 200)
.edgesIgnoringSafeArea(.top)
.navigationTitle("Hello")
.navigationBarTitleDisplayMode(.inline)
// New modifiers
.toolbarBackground(.clear, for: .navigationBar)
.toolbarColorScheme(.dark, for: .navigationBar)
.toolbarBackground(.visible, for: .navigationBar)
}
}
}
Produces:
Notice there is an translucent effect applied.
Does anyone know how to remove this translucent effect and instead make it transparent whilst keeping dark color scheme (title/status bar is white)?
Maybe this could work for you:
.toolbarBackground(.hidden, for: .navigationBar
Edit:
You can try:
.toolbarColorScheme
You can find more information here:
How to change status bar color in SwiftUI
Related
This ought to be straightforward enough, but I cannot find out how to place a background behind a NavigationStack. With NavigationView, it was simply a matter of embedding in a ZStack with the background view called before the NavigationView (as described in an older post: How change background color if using NavigationView in SwiftUI?)
The same technique does not work for me with NavigationStack.
Here's what I have:
struct MyAngularGradient: View {
var body: some View {
ZStack {
AngularGradient(gradient: Gradient(colors: [.red, .orange , .yellow, .green, .cyan, .blue, .indigo, .purple, .red]), center: .leading)
AngularGradient(gradient: Gradient(colors: [.red, .orange , .yellow, .green, .cyan, .blue, .indigo, .purple, .red]), center: .leading)
.offset(x: -8)
}
.ignoresSafeArea()
}
}
var body: some View {
ZStack{
MyAngularGradient()
NavigationStack {
...
}
.navigationViewStyle(.stack)
} // end ZStack
FYI, I've used the same MyAngularGradient()in other apps (with NavigationView)
Any ideas? Thanks.
The closest I've managed to get so far is this:
struct MyView: View {
var body: some View {
NavigationStack {
ZStack {
Color.pink.ignoresSafeArea()
List {
NavigationLink("Hello") {
Text("Hello")
}
}
.navigationTitle("Title")
}
}
.scrollContentBackground(.hidden)
}
}
Which is somewhat dissatisfying for the following reasons:
When you scroll up the navigation bar appears, as expected, but ruins the effect imo.
I guess you can experiment changing this in a limited way using UINavigationBarAppearance() by updating it in the constructor of the view.
You can't apply a background to the whole app if you have multiple NavigationStackView based views in a TabView. (My example above was in a TabView)
When a new view is pushed on the stack the custom background disappears.
Only works on iOS 16+ due to the .scrollContentBackground(.hidden) modifier.
Does not work if you use ForEach to populate the List. Interestingly if you debug the hierarchy with and without the ForEach you'll see that SwiftUI adds a new view controller which is opaque in the case of ForEach.
I am using Xcode to create an app that requires buttons. Right now, when I create a button, I get the text label, which I want, but I also get a background with rounded corners around it. I want to have the button with just the label but without the background. I was using Swift Playgrounds before Xcode and did not have this problem.
Here is my code:
import SwiftUI
struct ContentView: View {
var body: some View {
ZStack {
Rectangle()
.frame(width: 1000, height: 500)
.foregroundColor(.red)
Button(action: {
}) {
Text("Button")
}
}
}
}
Customize the button's style with the .buttonStyle view modifier:
Button(action: {}) {
Text("Button")
}
.buttonStyle(.borderless)
.borderless, .plain, and .link are the options that will result in no border.
Here is a Button without any background or border.
Button("Click") {
//do something
}
.background(.clear) //this
How do you get the same focus effect in SwiftUI for images as you can with UIKit? I see you can use the card button style and it does provide motion effects but not the parallax that adjustsImageWhenAncestorFocused provides.
struct ContentView: View {
var body: some View {
Button {
print("tapped")
} label: {
AsyncImage(url: URL(string: "Image-URL"))
.frame(width: 300, height: 300)
}
.buttonStyle(.card)
}
}
I know this question is pretty old, but I ran into the same problem and found that wrapping your UIImageView in a UIViewRepresentable works just fine.
In SwiftUI the view behind the tab bar in a TabView will shine through as if the backside of the tab bar was frosted glass. Apple uses this look all over the place in their own apps. But how do I add it to a view in SwiftUI?
Here's an example from the Podcasts app. The tab bar has the frosted glass effect. And so does the overlay mini player on top of the tab bar. Any tab bar in a TabView in will have this look by default, but not an associated overlay (the mini player in this case).
The Apple way
Investigating on the view hierarchy shows that Apple is using UIKit and UIVisualEffectViewfor this reason. You can define a VisualEffectView with just 5 lines of code:
struct VisualEffectView: UIViewRepresentable {
var effect: UIVisualEffect?
func makeUIView(context: UIViewRepresentableContext<Self>) -> UIVisualEffectView { UIVisualEffectView() }
func updateUIView(_ uiView: UIVisualEffectView, context: UIViewRepresentableContext<Self>) { uiView.effect = effect }
}
Usage Example:
struct ContentView: View {
var body: some View {
ZStack {
Image("BG")
.resizable()
.scaledToFill()
.edgesIgnoringSafeArea(.all)
VisualEffectView(effect: UIBlurEffect(style: .dark))
.edgesIgnoringSafeArea(.all)
Text("Hello \nVisual Effect View")
.font(.largeTitle)
.fontWeight(.black)
.foregroundColor(.white)
}
}
}
The Native SwiftUI way:
You can add .blur() modifier on anything you need to be blurry like:
struct ContentView: View {
var body: some View {
ZStack {
Image("BG")
.resizable()
.scaledToFill()
.edgesIgnoringSafeArea(.all)
.blur(radius: 20) // <- this is the important modifier. The rest is just for demo
Text("Hello \nSwiftUI Blur Effect")
.font(.largeTitle)
.fontWeight(.black)
.foregroundColor(.white)
}
}
}
Note the top and bottom of the view
Note that you can Group multiple views and blur them together.
iOS 15 - Apple Material
You can use iOS predefined materials with one line code:
.background(.ultraThinMaterial)
I am playing around with SwiftUI and I am stuck on this View. everything is working fine but this little bug is very frustrating.I am trying to display the images as a vertical view and it won't show on the view . I know the Images are loaded but the view is not showing it . Its covered in blue color.
import SwiftUI
struct PlanetHome : View {
var planets : [Planet]
var body : some View {
NavigationView {
ScrollView {
ZStack {
Color.black .edgesIgnoringSafeArea (.all)
VStack (alignment: .center)
{
ForEach (self.planets.identified(by: \.imageName))
{
planet in NavigationLink (destination: PlanetDetail(planets: planet))
{
PlanetsView (planets: planet)
.frame (width: 500, height: 500)
.padding (.vertical, 5)
}
}
}
}
}
.navigationBarTitle (Text("Planets"))
}
}
}
I tried to put the NavigationView under the ZStack but it did not work.I have no Idea what I did wrong on the code. No error message on the debugger. just doesn't show the images.
The NavigationLink applies a button style to the objects it holds. Button does the same. To remove the blue color, add the buttonStyle modifier:
NavigationLink(destination: ...) {
...
}
.buttonStyle(PlainButtonStyle())
You can create and apply your own button style as well.
Its covered in blue color.
You can change blue color to whatever you want with .foregroundColor(.YourColor) or just change Render as Default to Render as Original Image at Assets.xcassets -> Pick Any Image -> Show the Attribute inspector
To fix other problem you should include PlanetsView because when i put Image(systemName: "photo") instead your view it's shows correctly