I'm beginning to try out SwiftUI
and I'm surprised that it doesn't seem to be straightforward to change the background color of a View
. How do you do this using SwiftUI
?
This question is related to
view
background
background-color
modifier
swiftui
You can do something like:
.background(Color.black)
around your view.
eg. from the default template (I am encompassing it around a Group):
var body: some View {
VStack {
Text("Hello SwiftUI!")
}
.background(Color.black)
}
To add some opacity to it, you can add the .opacity
method as well:
.background(Color.black.opacity(0.5))
You can also make use of the inspect element of the view by CMD + click on the View and clicking Show SwiftUI Inspector
> Background
> Your Color
The code on Scene delegate in Swift UI
Content view background-color
window.rootViewController?.view.backgroundColor = .lightGray
Fill the entire screen
var body : some View{
Color.green.edgesIgnoringSafeArea(.all)
}
like this
struct ContentView : View {
@State var fullName: String = "yushuyi"
var body: some View {
VStack
{
TextField($fullName).background(SwiftUI.Color.red)
Spacer()
}.background(SwiftUI.Color.yellow.edgesIgnoringSafeArea(.all))
}
}
var body: some View {
var body: some View {
NavigationView {
ZStack {
// Background
Color.blue.edgesIgnoringSafeArea(.all)
content
}
//.navigationTitle(Constants.navigationTitle)
//.navigationBarItems(leading: cancelButton, trailing: doneButton)
//.navigationViewStyle(StackNavigationViewStyle())
}
}
}
var content: some View {
// your content here; List, VStack etc - whatever you want
VStack {
Text("Hello World")
}
}
List
:All SwiftUI's List
s are backed by a UITableView
in iOS. so you need to change the background color of the tableView. But since Color
and UIColor
values are slightly different, you can get rid of the UIColor
.
struct ContentView : View {
init(){
UITableView.appearance().backgroundColor = .clear
}
var body: some View {
List {
Section(header: Text("First Section")) {
Text("First Cell")
}
Section(header: Text("Second Section")) {
Text("First Cell")
}
}
.background(Color.yellow)
}
}
Now you can use Any background (including all Color
s) you want
Also First look at this result:
As you can see, you can set the color of each element in the View hierarchy like this:
struct ContentView: View {
init(){
UINavigationBar.appearance().backgroundColor = .green
//For other NavigationBar changes, look here:(https://stackoverflow.com/a/57509555/5623035)
}
var body: some View {
ZStack {
Color.yellow
NavigationView {
ZStack {
Color.blue
Text("Some text")
}
}.background(Color.red)
}
}
}
And the first one is window
:
window.backgroundColor = .magenta
The very common issue is we can not remove the background color of SwiftUI's HostingViewController
(yet), so we can't see some of the views like navigationView
through the views hierarchy. You should wait for the API or try to fake those views (not recommended).
Xcode 11.5
Simply use ZStack to add background color or images to your main view in SwiftUI
struct ContentView: View {
var body: some View {
ZStack {
Color.black
}
.edgesIgnoringSafeArea(.vertical)
}
}
Several possibilities : (SwiftUI / Xcode 11)
1 .background(Color.black) //for system colors
2 .background(Color("green")) //for colors you created in Assets.xcassets
Hope it help :)
Would this solution work?:
add following line to SceneDelegate: window.rootViewController?.view.backgroundColor = .black
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
if let windowScene = scene as? UIWindowScene {
window.rootViewController?.view.backgroundColor = .black
}
I like to declare a modifier for changing the background color of a view.
extension View {
func background(with color: Color) -> some View {
background(GeometryReader { geometry in
Rectangle().path(in: geometry.frame(in: .local)).foregroundColor(color)
})
}
}
Then I use the modifier by passing in a color to a view.
struct Content: View {
var body: some View {
Text("Foreground Label").foregroundColor(.green).background(with: .black)
}
}
Use Below Code for Navigation Bar Color Customization
struct ContentView: View {
@State var msg = "Hello SwiftUI"
init() {
UINavigationBar.appearance().backgroundColor = .systemPink
UINavigationBar.appearance().largeTitleTextAttributes = [
.foregroundColor: UIColor.white,
.font : UIFont(name:"Helvetica Neue", size: 40)!]
// 3.
UINavigationBar.appearance().titleTextAttributes = [
.font : UIFont(name: "HelveticaNeue-Thin", size: 20)!]
}
var body: some View {
NavigationView {
Text(msg)
.navigationBarTitle(Text("NAVIGATION BAR"))
}
}
}
(As of Xcode Version 12)
I'm not sure if the original poster meant the background color of the entire screen or of individual views. So I'll just add this answer which is to set the entire screen's background color.
var body: some View {
ZStack {
Color.purple
.ignoresSafeArea()
// Your other content here
// Other layers will respect the safe area edges
}
}
I added .ignoresSafeArea()
otherwise, it will stop at safe area margins.
var body: some View {
Color.purple
.ignoresSafeArea(.vertical) // Ignore just for the color
.overlay(
VStack(spacing: 20) {
Text("Overlay").font(.largeTitle)
Text("Example").font(.title).foregroundColor(.white)
})
}
Note: It's important to keep the .ignoresSafeArea
on just the color so your main content isn't ignoring the safe area edges too.
You can Simply Change Background Color of a View:
var body : some View{
VStack{
Color.blue.edgesIgnoringSafeArea(.all)
}
}
and You can also use ZStack :
var body : some View{
ZStack{
Color.blue.edgesIgnoringSafeArea(.all)
}
}
Source: Stackoverflow.com