How to change the style of image with a event in swiftui?
for example :change the image border color when I click a button, and the image is identified by name
Here is a demo
struct DemoImageBorder: View {
#State private var highlighted = false
var body: some View {
VStack {
Button("Highlight") { self.highlighted.toggle() }
Divider()
Image("some_name_here")
.border(self.highlighted ? Color.red : Color.clear)
}
}
}
how about something like this, change the color border just for the desired image name:
import SwiftUI
struct ContentView: View {
#State var borderColor = Color.blue
#State var imageName = "xyz"
var body: some View {
VStack {
Button(action: {
self.borderColor = Color.red
self.imageName = "person.3"
}){
Text("Change Image border")
}
Image(systemName: "person")
.resizable()
.frame(width: 200, height: 200)
.border(self.imageName == "person" ? borderColor : Color.blue)
Image(systemName: "person.3")
.resizable()
.frame(width: 200, height: 200)
.border(self.imageName == "person.3" ? borderColor : Color.blue)
}
}
}
Related
I have a view that displays multiple images fetched from Firebase in a VStack. Each image is a button, the button opens a sheet and it displays the image and text that goes with it. When I dismiss the sheet and press on a different image the same data comes up. How do I refresh these paramaters
VStack View with images as buttons:
#State var dic = OrderedDictionary<String, UIImage>()
VStack (alignment: .center) {
ForEach(dic.keys, id: \.self) { dicObject in
Button {
showingSheet.toggle()
} label: {
Image(uiImage: dic[dicObject]!)
.resizable()
.frame(width: 300, height: 400)
.cornerRadius(20)
}
.sheet(isPresented: $showingSheet) {
GalleryViewSpecific(image: dic[dicObject]!, url: dicObject)
}
}
}
View specific image view used by .sheet
//#State var image: UIImage
#State var image: UIImage
#State var url: String
#Environment(\.dismiss) var dismiss
var body: some View {
ScrollView {
VStack(alignment: .leading) {
Button("Press to dismiss") {
dismiss()
}
.font(.title)
.padding()
.background(.black)
Image(uiImage: image)
.resizable()
.frame(width: 300, height: 400)
.cornerRadius(20)
Text(url)
.foregroundColor(.white)
}
}
.background(Color.black)
}
Store the displayed item when you tap the button inside the ForEach:
import SwiftUI
struct ContentView: View {
struct Item: Identifiable {
let id = UUID()
let text: String
}
let items = [Item(text: "1"), Item(text: "2")]
#State var selectedItem: Item?
var body: some View {
VStack {
ForEach(items, id: \.id) { item in
Button(action: {
selectedItem = item
}) {
Text(item.text)
}
}
.sheet(item: $selectedItem) { selectedItem in
Text(selectedItem.text)
}
}
.padding()
}
}
I am trying to make a program where the user enters a certain set of characters into the search bar (for example "AP1") and the program draws a rectangle on top of an image I have.
I will have a bunch of if statements testing what the user entered and giving the coordinates for where the rectangle will be drawn. I am just having trouble with the "scopes" and the ZStack and VStack for the image overlay not wanting to cooperate with how I have the if statement(s) set up. Here is my entire program:
This is my third day doing any type of iOS development
import SwiftUI
struct ContentView: View {
private var listOfBins = binList
#State var searchText = ""
var body: some View {
// MAP
VStack {
Image("map")
.resizable()
.scaledToFit()
.position(x: 195, y: 175)
.overlay(ImageOverlay(), alignment: .bottomTrailing)
Spacer()
}
NavigationView {
List {
ForEach(bins, id: \.self) { bin in
HStack {
Text(bin.capitalized)
.textCase(.uppercase)
Spacer()
Image(systemName: "figure.walk")
.foregroundColor(Color.blue)
}
.padding()
}
}
.searchable(text: $searchText)
.navigationTitle("Bins")
if (searchText.elementsEqual("AP1")) {
drawBox(width: 50, height: 50, x: 50, y: 50)
}
}
}
func drawBox(width: Int, height: Int, x: Int, y: Int) -> Rectangle{
struct ImageOverlay: View{
var body: some View {
ZStack {
Rectangle()
.fill(.green)
.frame(width: 100, height: 100)
.position(x: 200, y: 300)
}
}
}
}
// DISPLAY LIST OF BINS AND SEARCH BAR
var bins: [String] {
let upBins = listOfBins.map {$0.uppercased()}
return searchText == "" ? upBins : upBins.filter{
$0.contains(searchText.uppercased())
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
}
Could not run your provided code, so I replicated a temp view.
Is this something you wanted? (code is below the image)
struct SSContentView: View {
#State var searchText = ""
var images = ["Swift", "Ww", "Luffy"]
var body: some View {
NavigationView {
List {
TextField("Search Here", text: $searchText)
ForEach(0...5, id: \.self) { _ in
ForEach(images, id: \.self) { image in
ZStack {
Image(image)
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 50)
.overlay {
if searchText == image {
OverlayImage
}
}
}
}
}
}
.navigationTitle("My Pictures")
}
}
var OverlayImage: some View {
ZStack {
Rectangle()
.fill(.clear)
.frame(width: 60, height: 60)
.border(.green)
}
}
}
I'm trying to send and then display them in the scrollview realtime. But nothing shows up. How to solve it? So, basically when the user types the message into a textbox then it will be saved in array and then it will be populated to the crollView in realtime so the user can view all the messages.
Error: No errors, it just isn't visible.
import SwiftUI
struct SingleMessageBubbleModel: Identifiable {
let id = UUID()
var text: String
var received: Bool
var timeStamp: Date
}
var messagesDBArray : [SingleMessageBubbleModel] = []
struct ContentView: View {
#State private var showOnTheSpotMessaging: Bool = true
#State var textTyped: String
var body: some View {
if (showOnTheSpotMessaging) {
VStack {
HStack {
ScrollViewReader { proxy in
ScrollView {
LazyVStack {
ForEach(messagesDBArray, id: \.id) { message in
MessageBubble(message: message)
}
}
}
.padding(.top, 10)
.background(.gray)
.onChange(of: messagesDBArray.count) { id in
withAnimation {
proxy.scrollTo(id, anchor: .bottom)
}
}
}
.frame( height: 200, alignment: .bottomLeading)
}
HStack () {
TextEditor (text: $textTyped)
.frame(width: 200, height: 200, alignment: .leading)
Button ("Send", action: {
messagesDBArray.append(SingleMessageBubbleModel(text: textTyped, received: true, timeStamp: Date()))
})
}
}
}
}
}
struct MessageBubble: View {
var message: SingleMessageBubbleModel
#State private var showTime = false
var body: some View {
VStack(alignment: message.received ? .leading : .trailing) {
HStack {
Text(message.text)
.padding()
.background(message.received ? Color.gray : Color.blue)
.cornerRadius(30)
}
.frame(maxWidth: 300, alignment: message.received ? .leading : .trailing)
.onTapGesture {
withAnimation {
showTime.toggle()
}
}
if showTime {
Text("\(message.timeStamp.formatted(.dateTime.hour().minute()))")
.font(.caption2)
.foregroundColor(.gray)
.padding(message.received ? .leading : .trailing, 25)
}
}
.frame(maxWidth: .infinity, alignment: message.received ? .leading : .trailing)
.padding(message.received ? .leading : .trailing)
.padding(.horizontal, 4)
}
}
Basically, when the button is pressed, your property messagesDBArray is well and truly append with the new value.
However, and it's really important to understand this point in swiftUI, nothing triggers the refresh of the view.
I suggest you two solutions:
If you don't need messagesDBArray to be outside of ContentView:
You just have to add messagesDBArray as a state in ContentView like following
struct ContentView: View {
#State var messagesDBArray : [SingleMessageBubbleModel] = []
#State private var showOnTheSpotMessaging: Bool = true
#State var textTyped: String = ""
var body: some View {
if (showOnTheSpotMessaging) {
VStack {
HStack {
ScrollViewReader { proxy in
ScrollView {
LazyVStack {
ForEach(messagesDBArray, id: \.id) { message in
MessageBubble(message: message)
}
}
}
.padding(.top, 10)
.background(.gray)
.onChange(of: messagesDBArray.count) { id in
withAnimation {
proxy.scrollTo(id, anchor: .bottom)
}
}
}
.frame( height: 200, alignment: .bottomLeading)
}
HStack () {
TextEditor (text: $textTyped)
.frame(width: 200, height: 200, alignment: .leading)
Button ("Send", action: {
messagesDBArray.append(SingleMessageBubbleModel(text: textTyped, received: true, timeStamp: Date()))
})
}
}
}
}
}
If you need messagesDBArray to be outside of ContentView:
1- Create a class (ViewModel or Service or whatever you wan to call it) with messagesDBArray as a #Published property
final class ViewModel: ObservableObject {
#Published var messagesDBArray : [SingleMessageBubbleModel] = []
}
2- Observe this class in ContentView in order to append and receive the update
struct ContentView: View {
#ObservedObject private var viewModel = ViewModel()
#State private var showOnTheSpotMessaging: Bool = true
#State var textTyped: String = ""
var body: some View {
if (showOnTheSpotMessaging) {
VStack {
HStack {
ScrollViewReader { proxy in
ScrollView {
LazyVStack {
ForEach(viewModel.messagesDBArray, id: \.id) { message in
MessageBubble(message: message)
}
}
}
.padding(.top, 10)
.background(.gray)
.onChange(of: viewModel.messagesDBArray.count) { id in
withAnimation {
proxy.scrollTo(id, anchor: .bottom)
}
}
}
.frame( height: 200, alignment: .bottomLeading)
}
HStack () {
TextEditor (text: $textTyped)
.frame(width: 200, height: 200, alignment: .leading)
Button ("Send", action: {
viewModel.messagesDBArray.append(SingleMessageBubbleModel(text: textTyped, received: true, timeStamp: Date()))
})
}
}
}
}
}
I hope that this is clear to you and that it has been useful 😉
#ViewBuilder
func TabButton (image: String)-> some View{
Button {
withAnimation{currentTab = image}
} label: {
Image(image)
.resizable()
.renderingMode(.original)
.aspectRatio(contentMode: .fit)
.frame(width: 23, height: 22)
.foregroundColor(currentTab == image ? .primary : .gray)
.frame(maxWidth: .infinity)
}.buttonStyle(GradientButtonStyle())
}
}
I want rather than image from assets as input, system image whom is variable is input here and can change each time and not fixed. thank you
I use it like this,
struct MainView: View {
#State var showMenu: Bool = false
// Hiding Native One.
init(){
UITabBar.appearance().isHidden = true
}
#State var currentTab = "Home"
//offset for both drag gesture and showing menu.
#State var offset: CGFloat = 0
#State var lastStoredOffset: CGFloat = 0
var body: some View {
//let sideBarWidth = getRect().width - 90
// whole navigation view....
NavigationView{
HStack(spacing : 0){
//Side Menu
//SideMenu(showMenu: $showMenu)
//Main Tab View
VStack(spacing: 0){
TabView(selection: $currentTab){
Home(showMenu: $showMenu)
.navigationBarTitleDisplayMode(.inline)
.navigationBarHidden(true)
.tag("Home")
}
this is the tabview code up
VStack(spacing: 0)
{
Divider()
HStack(spacing:0){
// tab buttons
TabButton(image: "Home")
}
}
}
}
I want system image rather than image here , need help please!
I can only guess ... but I think you want something like this?
struct MainView: View {
// Hiding Native One.
init(){
UITabBar.appearance().isHidden = true
}
#State var currentTab = "house"
var body: some View {
//let sideBarWidth = getRect().width - 90
// whole navigation view....
NavigationView{
VStack(spacing : 0) {
//Side Menu
//SideMenu(showMenu: $showMenu)
//Main Tab View
TabView(selection: $currentTab) {
Text("Home Content") // Home(showMenu: $showMenu)
.tag("house")
Text("Star Content") // ...
.tag("star")
Text("Settings Content") // ...
.tag("gear")
}
.tabViewStyle(.page(indexDisplayMode: .never))
Divider()
Spacer(minLength: 10)
HStack {
// tab buttons
TabButton(image: "house")
TabButton(image: "star")
TabButton(image: "gear")
}
}
}
}
func TabButton (image: String)-> some View{
Button {
withAnimation{ currentTab = image }
} label: {
Image(systemName: image)
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 23, height: 22)
.foregroundColor( currentTab == image ? .primary : .gray)
.frame(maxWidth: .infinity)
}
// .buttonStyle(GradientButtonStyle())
}
}
I would like to react on a choice of a user. Something similar to this example:
In a 2nd stage would I like to show additional content below each radiobutton, e.g. moving the buttons 2 and 3 from each other in order to give a list of websites for allowing.
So far I haven't found how to do this in SwiftUI.
Many thanks in advance!
Picker(selection: $order.avocadoStyle, label: Text("Avocado:")) {
Text("Sliced").tag(AvocadoStyle.sliced)
Text("Mashed").tag(AvocadoStyle.mashed)
}.pickerStyle(RadioGroupPickerStyle())
This is the code from the 2019 swiftUI essentials keynote (SwiftUI Essentials - WWDC 2019. Around 43 minutes in the video they show this example.
It will look like this:
check this out...an easy to use SwiftUI RadiobuttonGroup for iOS
you can use it like this:
RadioButtonGroup(items: ["Rome", "London", "Paris", "Berlin", "New York"], selectedId: "London") { selected in
print("Selected is: \(selected)")
}
and here is the code:
struct ColorInvert: ViewModifier {
#Environment(\.colorScheme) var colorScheme
func body(content: Content) -> some View {
Group {
if colorScheme == .dark {
content.colorInvert()
} else {
content
}
}
}
}
struct RadioButton: View {
#Environment(\.colorScheme) var colorScheme
let id: String
let callback: (String)->()
let selectedID : String
let size: CGFloat
let color: Color
let textSize: CGFloat
init(
_ id: String,
callback: #escaping (String)->(),
selectedID: String,
size: CGFloat = 20,
color: Color = Color.primary,
textSize: CGFloat = 14
) {
self.id = id
self.size = size
self.color = color
self.textSize = textSize
self.selectedID = selectedID
self.callback = callback
}
var body: some View {
Button(action:{
self.callback(self.id)
}) {
HStack(alignment: .center, spacing: 10) {
Image(systemName: self.selectedID == self.id ? "largecircle.fill.circle" : "circle")
.renderingMode(.original)
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: self.size, height: self.size)
.modifier(ColorInvert())
Text(id)
.font(Font.system(size: textSize))
Spacer()
}.foregroundColor(self.color)
}
.foregroundColor(self.color)
}
}
struct RadioButtonGroup: View {
let items : [String]
#State var selectedId: String = ""
let callback: (String) -> ()
var body: some View {
VStack {
ForEach(0..<items.count) { index in
RadioButton(self.items[index], callback: self.radioGroupCallback, selectedID: self.selectedId)
}
}
}
func radioGroupCallback(id: String) {
selectedId = id
callback(id)
}
}
struct ContentView: View {
var body: some View {
HStack {
Text("Example")
.font(Font.headline)
.padding()
RadioButtonGroup(items: ["Rome", "London", "Paris", "Berlin", "New York"], selectedId: "London") { selected in
print("Selected is: \(selected)")
}
}.padding()
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
struct ContentViewDark_Previews: PreviewProvider {
static var previews: some View {
ContentView()
.environment(\.colorScheme, .dark)
.darkModeFix()
}
}
I just edited #LizJ answer , by adding Binding instead of didTapActive & didTapInactive , so like that it will looks like other SwiftUI elements
import SwiftUI
struct RadioButton: View {
#Binding var checked: Bool //the variable that determines if its checked
var body: some View {
Group{
if checked {
ZStack{
Circle()
.fill(Color.blue)
.frame(width: 20, height: 20)
Circle()
.fill(Color.white)
.frame(width: 8, height: 8)
}.onTapGesture {self.checked = false}
} else {
Circle()
.fill(Color.white)
.frame(width: 20, height: 20)
.overlay(Circle().stroke(Color.gray, lineWidth: 1))
.onTapGesture {self.checked = true}
}
}
}
}
I'm using swift4, Catalina OS and Xcode 11.2 and was having the issue where RadioGroupPickerStyle was unavailable for iOS and .radiogroup just didn't work (it froze in build) so I made my own that's reusable for other occasions. (notice its only the button so you have to handle the logic yourself.) Hope it helps!
import SwiftUI
struct RadioButton: View {
let ifVariable: Bool //the variable that determines if its checked
let onTapToActive: ()-> Void//action when taped to activate
let onTapToInactive: ()-> Void //action when taped to inactivate
var body: some View {
Group{
if ifVariable {
ZStack{
Circle()
.fill(Color.blue)
.frame(width: 20, height: 20)
Circle()
.fill(Color.white)
.frame(width: 8, height: 8)
}.onTapGesture {self.onTapToInactive()}
} else {
Circle()
.fill(Color.white)
.frame(width: 20, height: 20)
.overlay(Circle().stroke(Color.gray, lineWidth: 1))
.onTapGesture {self.onTapToActive()}
}
}
}
}
TO USE: Put this in any file and you can use it as you would any other view anywhere else in the project. (we keep a global folder that has a buttons file in it)
I will use the previous answer of #LizJ and i will add a text after the radio button to resemble (RadioListTile in Flutter)
struct RadioButton: View {
let ifVariable: Bool //the variable that determines if its checked
let radioTitle: String
var onTapToActive: ()-> Void//action when taped to activate
let onTapToInactive: ()-> Void //action when taped to inactivate
var body: some View {
Group{
if ifVariable {
HStack(alignment: .center, spacing: 16) {
ZStack{
Circle()
.fill(AppColors.primaryColor)
.frame(width: 20, height: 20)
Circle()
.fill(Color.white)
.frame(width: 8, height: 8)
}.onTapGesture {self.onTapToInactive()}
Text(radioTitle)
.font(.headline)
}
} else {
HStack(alignment: .center, spacing: 16){
Circle()
.fill(Color.white)
.frame(width: 20, height: 20)
.overlay(Circle().stroke(Color.gray, lineWidth: 1))
.onTapGesture {self.onTapToActive()}
Text(radioTitle)
.font(.headline)
}
}
}
}
I will also provide an example for the selection logic
we will create a enum for radio cases
enum PaymentMethod: Int {
case undefined = 0
case credit = 1
case cash = 2
}
then we will create #State variable to carry the selection, i will not recreate another SwiftUI view but only explain the basic concept without any boilerplate code
struct YourView: View {
#State private var paymentMethod: PaymentMethod
var body: some View {
RadioButton(ifVariable: paymentMethod == PaymentMethod.credit,radioTitle: "Pay in Credit", onTapToActive: {
paymentMethod = .credit
}, onTapToInactive: {})
RadioButton(ifVariable: paymentMethod == PaymentMethod.cash,radioTitle: "Pay in Cash", onTapToActive: {
paymentMethod = .cash
}, onTapToInactive: {})
}
}
with this previous code you can toggle between radio buttons in SwiftUI with a text after each selection to resemble (RadioListTile in Flutter)