I have a SwiftUI TextEditor , unlike Textfields that moves up when keyboard appears from this answer in this link Move TextField up when the keyboard has appeared in SwiftUI
the TextEditor does not respond to this keyboard modifiers and the keyboard hides a big chunk of the TextEditor view . Is there a bug with SwiftUI TextEditor . How can i do that ?
Are you looking for a dynamic textEditor like this? I set a maximum and minimum height so that it does not grow infinitely but you can easily get rid of that.
import SwiftUI
struct ReflectionSpace: View {
#State private var textEditorHeight : CGFloat = 100
#State private var reflection = ""
var body: some View {
ScrollView {
VStack{
ZStack(alignment: .leading) {
Text(reflection)
.font(.custom("Times", size: 12
))
.lineSpacing(1)
.frame(minHeight: 50)
.frame(maxHeight: 300)
.foregroundColor(.clear)
.padding()
.background(GeometryReader {
Color.clear.preference(key: ViewHeightKey.self,
value: $0.frame(in: .local).size.height)
})
TextEditor(text: $reflection)
.font(.custom("Times", size: 12))
.padding(6)
.lineSpacing(1)
.background(Color.red)
}
.padding(20)
.onPreferenceChange(ViewHeightKey.self) { textEditorHeight = $0 }
}
}
}
}
struct ViewHeightKey: PreferenceKey {
static var defaultValue: CGFloat { 0 }
static func
reduce(value: inout Value, nextValue: () -> Value) {
value = value + nextValue()
}
}
struct ReflectionSpace_Previews: PreviewProvider {
static var previews: some View {
ReflectionSpace()
}
}
Related
So I am trying to make my TabView height dynamic. I have been looking for a way to do this but I can't seem to find a solution anywhere. This is how my code looks like.
struct ContentView: View {
#State var contentHeight: CGFloat = 0
var body: some View {
NavigationView {
ScrollView {
VStack {
TabView {
TestView1(contentHeight: $contentHeight)
TestView2(contentHeight: $contentHeight)
}
.tabViewStyle(.page)
.frame(height: contentHeight)
.indexViewStyle(.page(backgroundDisplayMode: .always))
.background(.yellow)
}
.navigationBarTitleDisplayMode(.inline)
.navigationTitle("Test Project")
}
}
}
}
This is how my test1view and test2view look like.
struct TestView1: View {
#State var height: CGFloat = 0
#Binding var contentHeight: CGFloat
var body: some View {
Color.red
.frame(maxWidth:.infinity, minHeight: 200, maxHeight: 200)
.background(
GeometryReader { geo in
Color.clear
.preference(
key: HeightPreferenceKey.self,
value: geo.size.height
)
.onAppear {
contentHeight = height
}
}
.onPreferenceChange(HeightPreferenceKey.self) { height in
self.height = height
}
)
}
}
struct TestView2: View {
#Binding var contentHeight: CGFloat
#State var height: CGFloat = 0
var body: some View {
Color.black
.frame(maxWidth:.infinity, minHeight: 350, maxHeight: 350)
.background(
GeometryReader { geo in
Color.clear
.preference(
key: HeightPreferenceKey.self,
value: geo.size.height
)
.onAppear {
contentHeight = height
}
}
.onPreferenceChange(HeightPreferenceKey.self) { height in
self.height = height
}
)
}
}
struct HeightPreferenceKey: PreferenceKey {
static let defaultValue: CGFloat = 0
static func reduce(value: inout CGFloat, nextValue: () -> CGFloat) {
value = nextValue()
}
}
Now the problem is that when I drag it just a little the height changes. So when I drag it a little to the left the height changes to the height of TestView2 and it is still on TestView1.
I tried to add a drag gesture but it didn't let me swipe to the next page. So I don't know how I will be able to achieve this. Ive been looking for a solution but still no luck.
You can use the TabView($selection) initializer to do this. https://developer.apple.com/documentation/swiftui/tabview/init(selection:content:)
It tells you which tab you're currently viewing. Based off the middle point of the screen. And you don't have to deal with nasty GeometryReader and HeightPreferenceKey.
Here's your updated code. I even added a nice animation to fade between the two heights!
struct ContentView: View {
#State var selectedTab: Tab = .first
#State var animatedContentHeight: CGFloat = 300
enum Tab {
case first
case second
var contentHeight: CGFloat {
switch self {
case .first:
return 200
case .second:
return 350
}
}
}
var body: some View {
TabView(selection: $selectedTab) {
TestView1()
.tag(Tab.first)
TestView2()
.tag(Tab.second)
}
.tabViewStyle(.page)
// .frame(height: selectedTab.contentHeight) // Uncomment to see without animation
.frame(height: animatedContentHeight)
.indexViewStyle(.page(backgroundDisplayMode: .always))
.onChange(of: selectedTab) { newValue in
print("now selected:", newValue)
withAnimation { animatedContentHeight = selectedTab.contentHeight }
}
}
}
struct TestView1: View {
var body: some View {
Color.red
}
}
struct TestView2: View {
var body: some View {
Color.black
}
}
I'm building a custom modal and when I drag the modal, any subviews that have animation's attached, they animate while I'm dragging. How do I stop this from happening?
I thought about passing down an #EnvironmentObject with a isDragging flag, but it's not very scalable (and doesn't work well with custom ButtonStyles)
import SwiftUI
struct ContentView: View {
var body: some View {
Text("Hello, world!")
.padding()
.showModal(isShowing: .constant(true))
}
}
extension View {
func showModal(isShowing: Binding<Bool>) -> some View {
ViewOverlay(isShowing: isShowing, presenting: { self })
}
}
struct ViewOverlay<Presenting>: View where Presenting: View {
#Binding var isShowing: Bool
let presenting: () -> Presenting
#State var bottomState: CGFloat = 0
var body: some View {
ZStack(alignment: .center) {
presenting().blur(radius: isShowing ? 1 : 0)
VStack {
if isShowing {
Container()
.background(Color.red)
.offset(y: bottomState)
.gesture(
DragGesture()
.onChanged { value in
bottomState = value.translation.height
}
.onEnded { _ in
if bottomState > 50 {
withAnimation {
isShowing = false
}
}
bottomState = 0
})
.transition(.move(edge: .bottom))
}
}
}
}
}
struct Container: View {
var body: some View {
// I want this to not animate when dragging the modal
Text("CONTAINER")
.frame(maxWidth: .infinity, maxHeight: 200)
.animation(.spring())
}
}
UPDATE:
extension View {
func animationsDisabled(_ disabled: Bool) -> some View {
transaction { (tx: inout Transaction) in
tx.animation = tx.animation
tx.disablesAnimations = disabled
}
}
}
Container()
.animationsDisabled(isDragging || bottomState > 0)
In real life the Container contains a button with an animation on its pressed state
struct MyButtonStyle: ButtonStyle {
func makeBody(configuration: Self.Configuration) -> some View {
configuration.label
.scaleEffect(configuration.isPressed ? 0.9 : 1)
.animation(.spring())
}
}
Added the animationsDisabled function to the child view which does in fact stop the children moving during the drag.
What it doesn't do is stop the animation when the being initially slide in or dismissed.
Is there a way to know when a view is essentially not moving / transitioning?
Theoretically SwiftUI should not translate animation in this case, however I'm not sure if this is a bug - I would not use animation in Container in that generic way. The more I use animations the more tend to join them directly to specific values.
Anyway... here is possible workaround - break animation visibility by injecting different hosting controller in a middle.
Tested with Xcode 12 / iOS 14
struct ViewOverlay<Presenting>: View where Presenting: View {
#Binding var isShowing: Bool
let presenting: () -> Presenting
#State var bottomState: CGFloat = 0
var body: some View {
ZStack(alignment: .center) {
presenting().blur(radius: isShowing ? 1 : 0)
VStack {
Color.clear
if isShowing {
HelperView {
Container()
.background(Color.red)
}
.offset(y: bottomState)
.gesture(
DragGesture()
.onChanged { value in
bottomState = value.translation.height
}
.onEnded { _ in
if bottomState > 50 {
withAnimation {
isShowing = false
}
}
bottomState = 0
})
.transition(.move(edge: .bottom))
}
Color.clear
}
}
}
}
struct HelperView<Content: View>: UIViewRepresentable {
let content: () -> Content
func makeUIView(context: Context) -> UIView {
let controller = UIHostingController(rootView: content())
return controller.view
}
func updateUIView(_ uiView: UIView, context: Context) {
}
}
In Container, declare a binding var so you can pass the bottomState to the Container View:
struct Container: View {
#Binding var bottomState: CGFloat
.
.
.
.
}
Dont forget to pass bottomState to your Container View wherever you use it:
Container(bottomState: $bottomState)
Now in your Container View, you just need to declare that you don't want an animation while bottomState is being changed:
Text("CONTAINER")
.frame(maxWidth: .infinity, maxHeight: 200)
.animation(nil, value: bottomState) // You Need To Add This
.animation(.spring())
In .animation(nil, value: bottomState), by nil you are asking SwiftUI for no animations, while value of bottomState is being changed.
This approach is tested using Xcode 12 GM, iOS 14.0.1.
You must use the modifiers of the Text in the order i put them. that means that this will work:
.animation(nil, value: bottomState)
.animation(.spring())
but this won't work:
.animation(.spring())
.animation(nil, value: bottomState)
I also made sure that adding .animation(nil, value: bottomState) will only disable animations when bottomState is being changed, and the animation .animation(.spring()) should always work if bottomState is not being changed.
So this is my updated answer. I don't think there is a pretty way to do it so now I am doing it with a custom Button.
import SwiftUI
struct ContentView: View {
#State var isShowing = false
var body: some View {
Text("Hello, world!")
.padding()
.onTapGesture(count: 1, perform: {
withAnimation(.spring()) {
self.isShowing.toggle()
}
})
.showModal(isShowing: self.$isShowing)
}
}
extension View {
func showModal(isShowing: Binding<Bool>) -> some View {
ViewOverlay(isShowing: isShowing, presenting: { self })
}
}
struct ViewOverlay<Presenting>: View where Presenting: View {
#Binding var isShowing: Bool
let presenting: () -> Presenting
#State var bottomState: CGFloat = 0
#State var isDragging = false
var body: some View {
ZStack(alignment: .center) {
presenting().blur(radius: isShowing ? 1 : 0)
VStack {
if isShowing {
Container()
.background(Color.red)
.offset(y: bottomState)
.gesture(
DragGesture()
.onChanged { value in
isDragging = true
bottomState = value.translation.height
}
.onEnded { _ in
isDragging = false
if bottomState > 50 {
withAnimation(.spring()) {
isShowing = false
}
}
bottomState = 0
})
.transition(.move(edge: .bottom))
}
}
}
}
}
struct Container: View {
var body: some View {
CustomButton(action: {}, label: {
Text("Pressme")
})
.frame(maxWidth: .infinity, maxHeight: 200)
}
}
struct CustomButton<Label >: View where Label: View {
#State var isPressed = false
var action: () -> ()
var label: () -> Label
var body: some View {
label()
.scaleEffect(self.isPressed ? 0.9 : 1.0)
.gesture(DragGesture(minimumDistance: 0).onChanged({_ in
withAnimation(.spring()) {
self.isPressed = true
}
}).onEnded({_ in
withAnimation(.spring()) {
self.isPressed = false
action()
}
}))
}
}
The problem is that you can't use implicit animations inside the container as they will be animated when it moves. So you need to explicitly set an animation using withAnimation also for the button pressed, which I now did with a custom Button and a DragGesture.
It is the difference between explicit and implicit animation.
Take a look at this video where this topic is explored in detail:
https://www.youtube.com/watch?v=3krC2c56ceQ&list=PLpGHT1n4-mAtTj9oywMWoBx0dCGd51_yG&index=11
I'm trying to create a buttonStyle that has a different background color if the button is disabled.
How do I do that?
I've created the code below to react to a variable that I've introduced myself, but is it possible to have it react on the buttons .disabled() state?
My code:
struct MyButtonStyle: ButtonStyle {
var enabledState = false
func makeBody(configuration: Self.Configuration) -> some View {
configuration.label
.foregroundColor(Color.white)
.padding(10)
.padding(.horizontal, 20)
.background(self.enabledState ? Color(UIColor.orange) : Color(UIColor.lightGray))
.cornerRadius(20)
.frame(minWidth: 112, idealWidth: 112, maxWidth: .infinity, minHeight: 40, idealHeight: 40, maxHeight: 40, alignment: .center)
.scaleEffect(configuration.isPressed ? 0.9 : 1.0)
}
}
struct ContentView: View {
#State private var buttonEnabled = false
var body: some View {
HStack {
Button("Button") {
self.buttonEnabled.toggle()
print("Button pressed")
}
}
.buttonStyle(MyButtonStyle(enabledState: self.buttonEnabled))
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
To track .disabled there is EnvironmentValues.isEnabled that shows this state. But environment values are applicable only to views and do not work in style.
So the solution is to create custom button that tracks isEnabled and pass it into own style.
Below is a demo of solution approach (MyButtonStyle is not changed). Tested with Xcode 12b.
struct MyButton: View {
let title: String
let action: () -> ()
#Environment(\.isEnabled) var isEnabled // to handle own state !!
init(_ title: String, action: #escaping () -> ()) {
self.title = title
self.action = action
}
var body: some View {
Button(title, action: action)
.buttonStyle(MyButtonStyle(enabledState: isEnabled))
}
}
struct ContentView: View {
#State private var buttonEnabled = true
var body: some View {
HStack {
MyButton("Button") { // << here !!
self.buttonEnabled.toggle()
print("Button pressed")
}
.disabled(!buttonEnabled) // << here !!
}
}
}
Again using the Environment.isEnabled but this time using a ViewModifier. This has the advantage that you can use it on other Views, not just Buttons. This implementation reduces the opacity of the button background color so no need for a new style to be injected.
struct MyButtonModifier: ViewModifier {
#Environment(\.isEnabled) var isEnabled
let backgroundColor: Color
func body(content: Content) -> some View {
content
.background(backgroundColor.opacity(isEnabled ? 1 : 0.5))
}
}
Then use it in your code as
Button("foo") {
// action
}
.modifier(MyButtonModifier(backgroundColor: Color.red))
I created this popover:
import SwiftUI
struct Popover : View {
#State var showingPopover = false
var body: some View {
Button(action: {
self.showingPopover = true
}) {
Image(systemName: "square.stack.3d.up")
}
.popover(isPresented: $showingPopover){
Rectangle()
.frame(width: 500, height: 500)
}
}
}
struct Popover_Previews: PreviewProvider {
static var previews: some View {
Popover()
.colorScheme(.dark)
.previewDevice("iPad Pro (12.9-inch) (3rd generation)")
}
}
Default behaviour is that is dismisses, once tapped outside.
Question:
How can I set the popover to:
- Persist (not be dismissed when tapped outside)?
- Not block screen when active?
My solution to this problem doesn't involve spinning your own popover lookalike. Simply apply the .interactiveDismissDisabled() modifier to the parent content of the popover, as illustrated in the example below:
import SwiftUI
struct ContentView: View {
#State private var presentingPopover = false
#State private var count = 0
var body: some View {
VStack {
Button {
presentingPopover.toggle()
} label: {
Text("This view pops!")
}.popover(isPresented: $presentingPopover) {
Text("Surprise!")
.padding()
.interactiveDismissDisabled()
}.buttonStyle(.borderedProminent)
Text("Count: \(count)")
Button {
count += 1
} label: {
Text("Doesn't block other buttons too!")
}.buttonStyle(.borderedProminent)
}
.padding()
}
}
Tested on iPadOS 16 (Xcode 14.1), demo video included below:
Note: Although it looks like the buttons have lost focus, they are still interact-able, and might be a bug as such behaviour doesn't exist when running on macOS.
I tried to play with .popover and .sheet but didn't found even close solution. .sheet can present you modal view, but it blocks parent view. So I can offer you to use ZStack and make similar behavior (for user):
import SwiftUI
struct Popover: View {
#State var showingPopover = false
var body: some View {
ZStack {
// rectangles only for color control
Rectangle()
.foregroundColor(.gray)
Rectangle()
.foregroundColor(.white)
.opacity(showingPopover ? 0.75 : 1)
Button(action: {
withAnimation {
self.showingPopover.toggle()
}
}) {
Image(systemName: "square.stack.3d.up")
}
ModalView()
.opacity(showingPopover ? 1: 0)
.offset(y: self.showingPopover ? 0 : 3000)
}
}
}
// it can be whatever you need, but for arrow you should use Path() and draw it, for example
struct ModalView: View {
var body: some View {
VStack {
Spacer()
ZStack {
Rectangle()
.frame(width: 520, height: 520)
.foregroundColor(.white)
.cornerRadius(10)
Rectangle()
.frame(width: 500, height: 500)
.foregroundColor(.black)
}
}
}
}
struct Popover_Previews: PreviewProvider {
static var previews: some View {
Popover()
.colorScheme(.dark)
.previewDevice("iPad Pro (12.9-inch) (3rd generation)")
}
}
here ModalView pops up from below and the background makes a little darker. but you still can touch everything on your "parent" view
update: forget to show the result:
P.S.: from here you can go further. For example you can put everything into GeometryReader for counting ModalView position, add for the last .gesture(DragGesture()...) to offset the view under the bottom again and so on.
You just use .constant(showingPopover) instead of $showingPopover. When you use $ it uses binding and updates your #State variable when you press outside the popover and closes your popover. If you use .constant(), it will just read the value from you #State variable, and will not close the popover.
Your code should look like this:
struct Popover : View {
#State var showingPopover = false
var body: some View {
Button(action: {
self.showingPopover = true
}) {
Image(systemName: "square.stack.3d.up")
}
.popover(isPresented: .constant(showingPopover)) {
Rectangle()
.frame(width: 500, height: 500)
}
}
}
Is there an equivalent to InputAccessoryView in SwiftUI (or any indication one is coming?)
And if not, how would you emulate the behavior of an InputAccessoryView (i.e. a view pinned to the top of the keyboard)? Desired behavior is something like iMessage, where there is a view pinned to the bottom of the screen that animates up when the keyboard is opened and is positioned directly above the keyboard. For example:
Keyboard closed:
Keyboard open:
iOS 15.0+
macOS 12.0+,Mac Catalyst 15.0+
ToolbarItemPlacement has a new property in iOS 15.0+
keyboard
On iOS, keyboard items are above the software keyboard when present, or at the bottom of the screen when a hardware keyboard is attached.
On macOS, keyboard items will be placed inside the Touch Bar.
https://developer.apple.com
struct LoginForm: View {
#State private var username = ""
#State private var password = ""
var body: some View {
Form {
TextField("Username", text: $username)
SecureField("Password", text: $password)
}
.toolbar(content: {
ToolbarItemGroup(placement: .keyboard, content: {
Text("Left")
Spacer()
Text("Right")
})
})
}
}
iMessage like InputAccessoryView in iOS 15+.
struct KeyboardToolbar<ToolbarView: View>: ViewModifier {
private let height: CGFloat
private let toolbarView: ToolbarView
init(height: CGFloat, #ViewBuilder toolbar: () -> ToolbarView) {
self.height = height
self.toolbarView = toolbar()
}
func body(content: Content) -> some View {
ZStack(alignment: .bottom) {
GeometryReader { geometry in
VStack {
content
}
.frame(width: geometry.size.width, height: geometry.size.height - height)
}
toolbarView
.frame(height: self.height)
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
}
}
extension View {
func keyboardToolbar<ToolbarView>(height: CGFloat, view: #escaping () -> ToolbarView) -> some View where ToolbarView: View {
modifier(KeyboardToolbar(height: height, toolbar: view))
}
}
And use .keyboardToolbar view modifier as you would normally do.
struct ContentView: View {
#State private var username = ""
var body: some View {
NavigationView{
Text("Keyboar toolbar")
.keyboardToolbar(height: 50) {
HStack {
TextField("Username", text: $username)
}
.border(.secondary, width: 1)
.padding()
}
}
}
}
I got something working which is quite near the wanted result. So at first, it's not possible to do this with SwiftUI only. You still have to use UIKit for creating the UITextField with the wanted "inputAccessoryView". The textfield in SwiftUI doesn't have the certain method.
First I created a new struct:
import UIKit
import SwiftUI
struct InputAccessory: UIViewRepresentable {
func makeUIView(context: Context) -> UITextField {
let customView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 44))
customView.backgroundColor = UIColor.red
let sampleTextField = UITextField(frame: CGRect(x: 20, y: 100, width: 300, height: 40))
sampleTextField.inputAccessoryView = customView
sampleTextField.placeholder = "placeholder"
return sampleTextField
}
func updateUIView(_ uiView: UITextField, context: Context) {
}
}
With that I could finally create a new textfield in the body of my view:
import SwiftUI
struct Test: View {
#State private var showInput: Bool = false
var body: some View {
HStack{
Spacer()
if showInput{
InputAccessory()
}else{
InputAccessory().hidden()
}
}
}
}
Now you can hide and show the textfield with the "showInput" state. The next problem is, that you have to open your keyboard at a certain event and show the textfield. That's again not possible with SwiftUI and you have to go back to UiKit and making it first responder. If you try my code, you should see a red background above the keyboard. Now you only have to move the field up and you got a working version.
Overall, at the current state it's not possible to work with the keyboard or with the certain textfield method.
I've solved this problem using 99% pure SwiftUI on iOS 14.
In the toolbar you can show any View you like.
That's my implementation:
import SwiftUI
struct ContentView: View {
#State private var showtextFieldToolbar = false
#State private var text = ""
var body: some View {
ZStack {
VStack {
TextField("Write here", text: $text) { isChanged in
if isChanged {
showtextFieldToolbar = true
}
} onCommit: {
showtextFieldToolbar = false
}
.textFieldStyle(RoundedBorderTextFieldStyle())
.padding()
}
VStack {
Spacer()
if showtextFieldToolbar {
HStack {
Spacer()
Button("Close") {
showtextFieldToolbar = false
UIApplication.shared
.sendAction(#selector(UIResponder.resignFirstResponder),
to: nil, from: nil, for: nil)
}
.foregroundColor(Color.black)
.padding(.trailing, 12)
}
.frame(idealWidth: .infinity, maxWidth: .infinity,
idealHeight: 44, maxHeight: 44,
alignment: .center)
.background(Color.gray)
}
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
I managed to create a nicely working solution with some help from this post by Swift Student, with quite a lot of modification & addition of functionality you take for granted in UIKit. It is a wrapper around UITextField, but that's completely hidden from the user and it's very SwiftUI in its implementation. You can take a look at it in my GitHub repo - and you can bring it into your project as a Swift Package.
(There's too much code to put it in this answer, hence the link to the repo)
I have a implementation that can custom your toolbar
public struct InputTextField<Content: View>: View {
private let placeholder: LocalizedStringKey
#Binding
private var text: String
private let onEditingChanged: (Bool) -> Void
private let onCommit: () -> Void
private let content: () -> Content
#State
private var isShowingToolbar: Bool = false
public init(placeholder: LocalizedStringKey = "",
text: Binding<String>,
onEditingChanged: #escaping (Bool) -> Void = { _ in },
onCommit: #escaping () -> Void = { },
#ViewBuilder content: #escaping () -> Content) {
self.placeholder = placeholder
self._text = text
self.onEditingChanged = onEditingChanged
self.onCommit = onCommit
self.content = content
}
public var body: some View {
ZStack {
TextField(placeholder, text: $text) { isChanged in
if isChanged {
isShowingToolbar = true
}
onEditingChanged(isChanged)
} onCommit: {
isShowingToolbar = false
onCommit()
}
.textFieldStyle(RoundedBorderTextFieldStyle())
VStack {
Spacer()
if isShowingToolbar {
content()
}
}
}
}
}
You can do it this way without using a UIViewRepresentable.
Its based on https://stackoverflow.com/a/67502495/5718200
.onReceive(NotificationCenter.default.publisher(for: UITextField.textDidBeginEditingNotification)) { notification in
if let textField = notification.object as? UITextField {
let yourAccessoryView = UIToolbar()
// set your frame, buttons here
textField.inputAccessoryView = yourAccessoryView
}
}
}