I created a multi column picker with SwiftUI that I want to center on the screen.
However, whatever I try it remains left outlined as shows on the picture.
What I've tried:
Adding (alignment: .center) on the GeometryReader, HStack and VStack.
Trying to center the picker itself
putting the pickers in a container and center that
So the question is how do center the 3 columned picker on the screen.
Thanks for your support!
Paul
import SwiftUI
import Combine
struct ContentView: View {
#State var initial = "n"
#State var final = "iu"
#State var tone = 2
#State var pinyin = ""
var initials = ["b","c","ch","d","f","g","h","k","l","m","n","p","q","r","s","sh","t","w","x","z","zh"]
var finals = ["a","ai","an","ang","ao","e","ei","en","eng","er","i","ia","ian","iang","iao","ie","in","iong","iu","o","ong","u","ua","uan","uang","uai","ui","un","uo","ü","üan","üe","ün"]
var tones = [Int](1..<6)
var body: some View {
VStack{
Text("你")
.font(/*#START_MENU_TOKEN#*/.title/*#END_MENU_TOKEN#*/)
GeometryReader { geometry in
HStack{
Picker(selection: self.$initial, label: Text("")) {
ForEach(0 ..< self.initials.count) { index in
Text("\(self.initials[index])").tag(self.initials[index])
}
}
.onReceive(Just(initial), perform: { value in
updatePinyin()
})
.frame(width: geometry.size.width/6, height: 200).clipped()
Picker(selection: self.$final, label: Text("")) {
ForEach(0 ..< self.finals.count) { index in
Text("\(self.finals[index])").tag(self.finals[index])
}
}
.onReceive(Just(final), perform: { value in
updatePinyin()
})
.frame(width: geometry.size.width/6, height: 200).clipped()
Picker(selection: self.$tone, label: Text("")) {
ForEach(0 ..< self.tones.count) { index in
Text("\(self.tones[index])").tag(self.tones[index])
}
}
.onReceive(Just(tone), perform: { value in
updatePinyin()
})
.frame(width: geometry.size.width/6, height: 200).clipped()
}
}
Text(pinyin)
}
}
func updatePinyin() {
pinyin = initial + final + String(tone+1)
print(pinyin)
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
Group {
ContentView()
}
}
}
Not really sure the final goal, but for provided code it can be done just by making Stack consume all space provided by GeometryReader, like
HStack{
// ... other code here
}
.frame(maxWidth: .infinity) // << this one !!
Tested with Xcode 12.4 / iOS 14.4
Just add spacer in both side of Picker(s), Like that,
HStack {
Spacer()
// Other Codes
Spacer()
}
Related
I've got a TextField in SwiftUI that is centered on the screen. I want to add a pencil icon immediately. to the left of it to indicate that it is editable - how can I do this? I've tried embedding both the TextField and Image in an HStack like this:
HStack {
Spacer()
Image(systemName: "pencil")
TextField(...)
}
But that only yields something like this:
where the textfield is no longer centered and the pencil is aligned to the left of the screen.
Any guidance is appreciated.
this should do it:
TextField("", text: $input)
.overlay(alignment: .leading) {
Image(systemName: "pencil")
.offset(x: -24, y: 0)
}
struct CustomTextFieldView: View {
#State private var text: String = ""
var body: some View {
VStack(alignment: .leading) {
textfeild
.padding()
}
}
var textfeild: some View {
HStack {
Image(systemName: "pencil")
TextField("Edit me!", text: $text)
}
.textFieldStyle(DefaultTextFieldStyle())
}
}
struct CustomTextFieldView_Previews: PreviewProvider {
static var previews: some View {
CustomTextFieldView()
}
}
I am trying to add some filter options to sit at the top of my view, above the NavigationView. I wrote the following code that mostly does what I want, however it disabled the ability to click on the rows to get to the detailed view. I assume this is because my filter buttons are on top of the ZStack, but I'm not sure how else to get this to work.
Here is the code I wrote:
import SwiftUI
struct BonusList: View {
var bonuses = sampleBonusData
#State var showSettings = false
#State var showBonuses = false
#State var bonusEarned = true
#State var showStatePicker = false
#State var showCategoryPicker = false
var body: some View {
ZStack {
NavigationView {
List(bonuses) { item in
NavigationLink(destination: BonusDetail(bonusName: item.bonusName, bonusCode: item.bonusCode, city: item.city, sampleImage: item.sampleImage)) {
HStack(spacing: 12.0) {
Image(item.sampleImage)
.resizable()
.aspectRatio(contentMode: .fill)
.frame(width: 60, height: 60)
.background(Color.white)
.cornerRadius(15)
VStack(alignment: .leading) {
HStack {
Text(item.bonusName)
.font(.headline)
Spacer()
Image(systemName: "checkmark.shield")
.opacity(self.bonusEarned ? 100 : 0)
}
Text("\(item.city), \(item.state)")
.font(.subheadline)
.frame(height: 25.0)
HStack {
Text(item.bonusCategory)
.font(.caption)
.fontWeight(.bold)
.foregroundColor(.gray)
.padding(.top, 4)
Spacer()
Text(item.bonusCode)
.font(.caption)
.fontWeight(.bold)
.foregroundColor(.gray)
.padding(.top, 4)
}
}
}
}
}
.navigationBarTitle(Text("Bonuses"))
// .navigationBarHidden(true)
}
.saturation(self.bonusEarned ? 0 : 1)
HStack {
FilterByCategory(showCategoryPicker: $showCategoryPicker)
Spacer()
FilterByState(showStatePicker: $showStatePicker)
}
StatePicker(showStatePicker: $showStatePicker)
CategoryPicker(showCategoryPicker: $showCategoryPicker)
}
}
}
This is what it looks like when I run it:
If I'm understanding correctly, you have a view or two which sit higher in the ZStack that are off canvas and come in when those buttons are tapped?
You could consider using a modal and setting the view you want to show for each button as the view for the modal. This will keep your views off screen and still allow interaction with your list. Here's what I've done...
On the main view
import SwiftUI
struct MainView: View {
#State private var isPresented = false
var body: some View {
NavigationView {
VStack {
//...
}
//Modal
.sheet(isPresented: $isPresented, content: {
AddItem(showModal: self.$isPresented)
})
}
}
}
The modal's view
import SwiftUI
struct AddItem: View {
#Binding var showModal: Bool
var body: some View {
VStack {
Button(action: {
self.showModal = false
}, label: {
Text("Cancel")
})
}
}
}
Goal:
1- Shows a view (Blue) that covers entire screen
2- When tapped on bottom (top right corner), it shows an HStack animating right side HStack (Green) "Slide Offset animation".
import SwiftUI
struct ContentView: View {
#State var showgreen = false
var body: some View {
NavigationView {
HStack {
Rectangle()
.foregroundColor(.blue)
if showgreen {
Rectangle()
.foregroundColor(.green)
.offset(x: showgreen ? 0 : UIScreen.main.bounds.width)
.animation(.easeInOut)
}
}
.navigationBarItems(trailing:
Button(action: { self.showgreen.toggle() }) {
Image(systemName: "ellipsis")
})
}
.navigationViewStyle(StackNavigationViewStyle())
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
.colorScheme(.dark)
.previewDevice("iPad Pro (12.9-inch) (3rd generation)")
}
}
The code works, however I cannot get the Green "Slide Offset animation" to work. Really appreciate any help! : )
Instead of using the if conditional, you need the green rectangle to be already present, and just offscreen. When showgreen toggles, you need to shrink the size of the blue rectangle, which will make room for the green rectangle.
struct ContentView: View {
#State var showgreen = false
var body: some View {
NavigationView {
HStack {
Rectangle()
.foregroundColor(.blue)
.frame(width: showgreen ? UIScreen.main.bounds.width / 2 : UIScreen.main.bounds.width)
.animation(.easeInOut)
Rectangle()
.foregroundColor(.green)
.animation(.easeInOut)
}
.navigationBarItems(trailing:
Button(action: { self.showgreen.toggle() }) {
Image(systemName: "ellipsis")
})
}
.navigationViewStyle(StackNavigationViewStyle())
}
}
I want to set an image in the titleView of NavigationBar in SwiftUI, as we do in UIKit
navigationItem.titleView = UIImageView(image: UIImage(named: "logo"))
this is how we do it in UIKit.
anyone know how to do it?
Here's how to do it:
Add SwiftUIX to your project.
Set your custom title view via View.navigationBarTitleView(_:displayMode:)
Example code:
struct ContentView: View {
public var body: some View {
NavigationView {
Text("Hello World")
.navigationBarTitleView(MyView())
}
}
}
Simple, Just add your root view into ZStack with top alignment and add your custom center view after root view
struct CenterNavigattionBar: View {
var body: some View {
ZStack(alignment: .top){
//Root view with empty Title
NavigationView {
Text("Test Navigation")
.navigationBarTitle("",displayMode: .inline)
.navigationBarItems(leading: Text("Cancle"), trailing: Text("Done"))
}
//Your Custom Title
VStack{
Text("add title and")
.font(.headline)
Text("subtitle here")
.font(.subheadline)
}
}
}
}
Before Image
After Image
Just use a toolbar.
You can add any views
import SwiftUI
struct HomeView: View {
// MARK: - Initializer
init() {
let appearance = UINavigationBar.appearance()
appearance.isOpaque = true
appearance.isTranslucent = false
appearance.barTintColor = UIColor(named: "background")
appearance.shadowImage = UIImage()
}
// MARK: - View
// MARK: Public
var body: some View {
NavigationView {
VStack(spacing: 20) {
Text("Hello")
Text("Navigation Bar Test")
}
.navigationBarTitleDisplayMode(.inline)
.navigationBarItems(leading: leadingBarButtonItems, trailing: trailingBarButtonItems)
.toolbar {
ToolbarItem(placement: .principal) {
VStack {
Text("Title").font(.headline)
Text("Subtitle").font(.subheadline)
}
}
}
}
}
// MARK: Private
private var leadingBarButtonItems: some View {
Button(action: {
}) {
Text("Left Button")
.font(.system(size: 12, weight: .medium))
}
}
private var trailingBarButtonItems: some View {
HStack {
Button(action: {
}) {
Text("R1\nButton")
.font(.system(size: 12, weight: .medium))
.multilineTextAlignment(.center)
}
Button(action: {
}) {
Text("R2\nButton")
.font(.system(size: 12, weight: .medium))
.multilineTextAlignment(.center)
}
}
}
}
Currently, you can't.
There are two overloads for .navigationBarTitle(), taking either a Text view or a type conforming to StringProtocol. You can't even pass in a modified view like Text("Title").font(.body). This would be a great feature, I'd submit a feature request: http://feedbackassistant.apple.com
Maybe this works for you?
Basically:
Use GeometryReader to get the width of the screen
Have NavigationBarItems(leading: HStack {Spacer() Image("name").resizable().frame(width:..., height: ..., alignment: .center Spacer()}.frame(width:geometry.size.width)
Example code:
struct ContentView: View {
var body: some View {
NavigationView {
GeometryReader { geometry in
Text("Hello, world!")
.padding()
.navigationTitle("test")
.navigationBarItems(leading: HStack {
Spacer()
Image("money")
.resizable()
.frame(width: 50, height: 50, alignment: .center)
Spacer()
}
.frame(width: geometry.size.width)
)
}
}
}
}
Try this...
How to put a logo in NavigationView in swiftui?
This shows how to handle adding an Image to NavigationView in SwiftUI. Hope it helps.
I was trying to make a custom list. And its acting weired if we add Encapsulated VStack in scrollView and try to add new row from that VStack. But we have to encapsulate because in Xcode will give "complex view complier error". I am providing full code for better understanding. Please try to run it. New element is not added as expected and its pushing everything upward.
struct RowView: View {
var body: some View {
VStack{
HStack{
Spacer()
.foregroundColor(Color.black)
Spacer()
}
}
.background(Color.white)
.cornerRadius(13)
.padding()
}}
struct cView:View {
#State var array: [String] = []
#State var height: CGFloat = 60
var body: some View {
VStack{
Button(action: {
self.array.append("Test")
}, label: {
Text("Add")
})
VStack{
ForEach(array, id: \.self){_ in
RowView()
}
}
.background(Color.red)
.cornerRadius(13)
.padding()
}
}}
struct ContentView : View {
#State var array: [String] = []
var body: some View {
ScrollView{
VStack{
Text("d")
.frame(height: 90)
VStack{
cView()
}
}
}
.navigationBarTitle("Test", displayMode: .automatic)
}}
When I reformatted and removed unused stuff I got:
struct RowView: View {
let text: String
var body: some View {
VStack{
HStack{
Spacer()
Text(text).foregroundColor(Color.black)
Spacer()
}
}
.background(Color.white)
.cornerRadius(13)
.padding()
}
}
struct cView:View {
#State var array: [String] = []
#State var height: CGFloat = 60
var body: some View {
VStack{
Button(
action: { self.array.append("Test") },
label: { Text("Add") }
)
ForEach(array, id: \.self){text in
RowView(text: text)
}
.background(Color.red)
.cornerRadius(13)
.padding()
}
}
}
struct ContentView : View {
var body: some View {
List {
VStack{
Text("d")
cView()
}
}
}
}
ScrollView is a real PITA and it hates Text which is why I replaced it with a List. RowView was missing a Text IMHO so I put one in. The array in ContentView was never used so I removed it, similarly a navigatinBarTitle needs a NavigationView.
This isn't really an answer as it uses List instead of ScrollView but it does point to where your problems lie. It is also very strange as every thing is in a single List row but I tried to change as little as possible.
You might like to try running SwiftLint on your code. I often swear at it, especially when it complains about the cyclomatic complexity of my enum switches but it does improve my code.
Most likely a bug, but I did not need to encapsulate. And if I don't, the code works as expected:
struct RowView: View {
var body: some View {
VStack{
HStack{
Spacer()
.foregroundColor(Color.black)
Spacer()
}
}
.background(Color.white)
.cornerRadius(13)
.padding()
}
}
struct ContentView : View {
#State var array: [String] = []
#State var height: CGFloat = 60
var body: some View {
ScrollView{
VStack{
Text("d")
.frame(height: 90)
VStack{
Button(action: {
self.array.append("Test")
}, label: {
Text("Add")
})
VStack{
ForEach(array, id: \.self){_ in
RowView()
}
}
.background(Color.red)
.cornerRadius(13)
.padding()
}
}
}
.navigationBarTitle("Test", displayMode: .automatic)
}
}