I have a button that increments a firebase value by one, however I'm trying to only allow that button to be tapped once. Tried a few things but couldn't get it work correctly is there an simple way to get this working?
Button(action: {
let db = Firestore.firestore()
let like = Int.init(self.likes)!
db.collection("posts").document(self.id).updateData(["likes": "\(like + 1)"]) { err in
if err != nil {
print(err)
return
}
print("updated...")
}
}) {
Image(systemName: "arrow.up.square")
.frame(width: 26, height: 26)
}
Here is a simple demo:
struct ContentView: View {
#State var buttonTapped = false
var body: some View {
Button(action: {
self.buttonTapped.toggle()
// other actions...
}) {
Text("Tap me")
}
.disabled(buttonTapped)
}
}
Related
I have a button ("Next Word") that when pressed shows a new view ("PracticeResult"). The idea is that everytime you press it, a new random word appears on the screen. But so far, I have to press the button twice to get it to show the next image because it's triggered with a boolean state.
I've tried changing the State back to false with an ".onAppear" toggle but it doesn't work. I've also tried using an origin State to toggle the variable back to false but it hasn't worked either. I'm quite new to SwiftUI so any tips would be appreciated! Thanks in advance.
struct PracticeView: View {
#State var isTapped: Bool = false
var body: some View {
NavigationView {
ZStack {
Color.white
VStack() {
Image("lightlogolong")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 300.0, height: 100.0)
.cornerRadius(100)
.animation(.easeIn, value: 10)
NavigationLink(destination:
ContentView().navigationBarBackButtonHidden(true) {
HomeButton()
}
Group {
if (isTapped == true){
PracticeResult()
}
}.onAppear{
isTapped.toggle()
}
Button("Next Word", action:{
self.isTapped.toggle()
})
.padding()
.frame(width: 150.0, height: 40.0)
.font(.title2)
.accentColor(.black)
.background(Color("appblue"))
.clipShape(Capsule())
}
}
}
}
}
You could try this simple approach, using a UUID or something like it,
to trigger your PracticeResult view every time you tap the button. Note in particular the PracticeResult().id(isTapped)
struct PracticeView: View {
#State var isTapped: UUID? // <--- here
var body: some View {
NavigationView {
ZStack {
Color.white
VStack() {
Image("lightlogolong")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 300.0, height: 100.0)
.cornerRadius(100)
.animation(.easeIn, value: 10)
NavigationLink(destination:
ContentView().navigationBarBackButtonHidden(true) {
HomeButton()
}
if isTapped != nil {
PracticeResult().id(isTapped) // <--- here
}
Button("Next Word", action:{
isTapped = UUID() // <--- here
})
.padding()
.frame(width: 150.0, height: 40.0)
.font(.title2)
.accentColor(.black)
.background(Color.blue)
.clipShape(Capsule())
}
}
}
}
}
// for testing
struct PracticeResult: View {
#State var randomWord: String = UUID().uuidString
var body: some View {
Text(randomWord)
}
}
if you want your button trigger a new random word appears on the screen, you should use button to change that random word
for example (you can try it on Preview):
struct PracticeView: View {
let words = ["one","two","three"]
#State var wordToDisplay: String?
var body: some View {
VStack {
if let wordToDisplay = wordToDisplay {
Text(wordToDisplay)
}
Spacer()
Button("Next Word") {
wordToDisplay = words.filter { $0 != wordToDisplay }.randomElement()
}
}.frame(height: 50)
}
}
When I press the checkbox, using the code below, it updates the data in firebase, but when I try to uncheck, it takes two presses before it shows it as unpressed, even though on the first press, it updates in firebase.
struct ReportsUI: View {
#State var hasbeenbilled = false
var body: some View {
VStack {
VStack {
HStack {
VStack {
ZStack {
VStack {
}
.frame(width: 30, height: 30)
.background(hasbeenbilled == true ? .blue : colorScheme == .dark ? .black : .white)
.cornerRadius(5)
if hasbeenbilled {
Image(systemName: "checkmark")
.foregroundColor(.white)
}
}
}
.frame(width: 35, height: 35)
.background(.blue)
.cornerRadius(5)
.onTapGesture {
withAnimation {
hasbeenbilled.toggle()
}
let document = db.collection("Flights").document("\(flightnum)")
document.updateData([
"hasBeenBilled": hasbeenbilled,
]) { err in
if let err = err {
print("Error updating document: \(err)")
} else {
print("Document successfully updated")
}
}
}
}
}
}
.padding(.leading)
}
}
I tried removing the firebase update code, and it worked perfectly, except I need it to update in firebase. What can I do?
I know that this sounds a bit dumb, but how do you call a function only once. I have a tab bar at the bottom of my app, and every time that it is called, the name that I got from my firebase database, keeps on being added. For example, the name in firebase is Bob. The app for the first time will display Bob. Then you would click on the settings, and go back to the home view. Then the app will say BobBob, and over and over again. How do I make this stop.
Code:
import SwiftUI
import Firebase
struct HomeView: View {
#State var name = ""
var body: some View {
NavigationView {
ZStack {
VStack{
Text("Welcome \(name)")
.font(.title)
Text("Upcoming Lessions/Reservations:")
.bold()
.padding()
Divider()
}
}
}
.navigationTitle("Home")
.onAppear(perform: {
downloadNameServerData()
})
}
private func downloadNameServerData() {
let db = Firestore.firestore()
db.collection("users").addSnapshotListener {(snap, err) in
if err != nil{
print("\(String(describing: err))")
return
}
for i in snap!.documentChanges {
_ = i.document.documentID
if let Name = i.document.get("Name") as? String {
DispatchQueue.main.async {
name.append(Name)
print("\(name)")
}
}
}
}
}
}
struct HomeView_Previews: PreviewProvider {
static var previews: some View {
HomeView()
}
}
import SwiftUI
import Firebase
struct HomeView: View {
#State var name = ""
var body: some View {
NavigationView {
ZStack {
VStack{
Text("Welcome \(name)")
.font(.title)
Text("Upcoming Lessions/Reservations:")
.bold()
.padding()
Divider()
}
}
}
.navigationTitle("Home")
.onAppear(perform: {
downloadNameServerData()
})
}
private func downloadNameServerData() {
if !name.isEmpty { return }
let db = Firestore.firestore()
db.collection("users").addSnapshotListener {(snap, err) in
if err != nil{
print("\(String(describing: err))")
return
}
for i in snap!.documentChanges {
_ = i.document.documentID
if let Name = i.document.get("Name") as? String {
DispatchQueue.main.async {
name = Name
print("\(name)")
}
}
}
}
}
}
struct HomeView_Previews: PreviewProvider {
static var previews: some View {
HomeView()
}
}
Did you consider only loading the name if you don't have one yet?
.onAppear(perform: {
if (name == null) downloadNameServerData()
})
I'm trying to include some blog posts from my WordPress site into my app. I've tested the API using the individual post Ids for each post and I got it to load the data in my view. However, I'm now trying to fetch an array but it doesn't seem to be fetching the IDs related to the posts to populate the view. What am I doing wrong here?
let content: MarkdownData
#State var beholdarticles: BeholdArticle?
#State private var htmlContent = ""
let articles: [BeholdArticle] = []
private func loadArticle() {
guard let url = URL(string: "https://behold.hagleyparksda.com/wp-json/wp/v2/posts") else {
return
}
URLSession.shared.dataTask(with: url) {data, response, error in
guard let data = data else { return }
if let decodedData = try? JSONDecoder().decode(BeholdArticle.self, from: data){
DispatchQueue.main.async {
self.beholdarticles = decodedData
}
}
}.resume()
}
This is the ForEach loop
var body: some View {
ScrollView (.horizontal) {
ForEach(articles) { item in
ZStack {
if beholdarticles?.thumbnail != nil {
WebImage(url: URL(string: beholdarticles!.thumbnail)!)
.resizable()
.aspectRatio(contentMode: .fill)
.frame(width:350, height: 450)
} else {
Image("behold_imagecard")
.resizable()
.aspectRatio(contentMode: .fill)
}
HStack {
VStack (alignment: .leading) {
Text(beholdarticles?.title.rendered ?? "Loading...")
.font(.system(size: 30, weight: .bold))
.foregroundColor(Color.white)
.frame(width: 270)
// Text(beholdarticles?.title.rendered ?? "Loading...")
// .font(.system(size: 18, weight: .regular))
// .foregroundColor(Color.white)
// .frame(width: 270)
}
Spacer()
}
VStack {
Spacer()
HStack {
Image(uiImage: #imageLiteral(resourceName: "healthicon"))
Text("Spirituality")
.font(.system(size: 23))
.foregroundColor(Color.white)
Spacer()
}
.background(VisualEffectBlurView(blurStyle: .systemUltraThinMaterial))
}.onAppear{
loadArticle()
}
} .frame(width:350, height: 450)
.shadow(color: Color(#colorLiteral(red: 0.2549019754, green: 0.2745098174, blue: 0.3019607961, alpha: 1)) .opacity(0.2), radius: 20, x: /*#START_MENU_TOKEN#*/0.0/*#END_MENU_TOKEN#*/, y:14)
.cornerRadius(30)
}
}
My data model
struct BeholdArticle: Decodable, Identifiable {
var id: Int
var slug: String
var link: String
var thumbnail: String
var title: BeholdArticleTitle
var content: BeholdArticleContent
enum CodingKeys: String, CodingKey {
case thumbnail = "jetpack_featured_media_url"
case slug, link, title, content
case id = "id"
}
}
struct BeholdArticleTitle: Decodable {
var rendered: String
}
struct BeholdArticleContent: Decodable {
var rendered: String
}
I'm simply trying to populate my loop with the data, but it doesnt seem to be grabbing the ID's from api call. Need some help here
I still have the image URL wrapped in a conditional statement. At current the images wont come through. How do I adjust this to the updated setup?
if beholdarticles?.thumbnail != nil {
WebImage(url: URL(string: item.thumbnail)!)
.resizable()
.aspectRatio(contentMode: .fill)
.frame(width:350, height: 450)
} else {
Image("behold_imagecard")
.resizable()
.aspectRatio(contentMode: .fill)
}
Here's the updated image code:
ForEach(articles) { article in
ZStack {
if article.thumbnail != nil {
WebImage(url: URL(string: article.thumbnail)!)
.resizable()
.aspectRatio(contentMode: .fill)
.frame(width:350, height: 450)
} else {
Image("behold_imagecard")
.resizable()
.aspectRatio(contentMode: .fill)
}
If you want to decode the JSON from that URL endpoint, you're going to need to use [BeholdArticle].self instead of BeholdArticle.self, since it's an array of data.
Also, instead of calling loadArticle on each element of the ForEach (which will never get called, since it doesn't have data in it at the beginning), call it at the top level of the view.
Here's a pared down example:
struct ContentView: View {
#State private var articles : [BeholdArticle] = []
var body: some View {
ScrollView {
VStack (alignment: .leading) {
ForEach(articles) { article in
Text(article.title.rendered)
.multilineTextAlignment(.leading)
if let thumbnailURL = URL(string: article.thumbnail) {
WebImage(url: thumbnailURL)
.resizable()
.aspectRatio(contentMode: .fill)
.frame(width:350, height: 450)
}
}
}
}
.onAppear {
loadArticles()
}
}
private func loadArticles() {
guard let url = URL(string: "https://behold.hagleyparksda.com/wp-json/wp/v2/posts") else {
return
}
URLSession.shared.dataTask(with: url) {data, response, error in
guard let data = data else { return }
if let decodedData = try? JSONDecoder().decode([BeholdArticle].self, from: data){
DispatchQueue.main.async {
self.articles = decodedData
}
}
}.resume()
}
}
i have a bug, if i click on button before the animation before the card flip back. i think for me the best it would be to disable the button for 2 sec, but i made some research and didnt find anything!
struct CardBack: View {
var body: some View {
Image("back_card")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 250)
}
}
struct ContentView: View {
#State var flipped = false
#State private var cardsFront = ["bigCard1", "bigCard2", "bigCard3", "bigCard4", "bigCard5" ]
#State private var cardBack = "back_card"
#State private var disablled = true
var body: some View {
VStack {
Spacer()
ZStack {
Image(flipped ? self.cardsFront.randomElement()! : self.cardBack)
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 250)
.rotation3DEffect(Angle(degrees: flipped ? 180 : 0 ), axis: (x: 0, y: 1, z: 0))
}
Spacer()
HStack {
Button(action: {
withAnimation(.spring()) {
self.flipped.toggle()
}
DispatchQueue.main.asyncAfter(deadline: .now() + 1) {
withAnimation(.spring()) {
self.flipped.toggle()
}
}
}) {
Image("circle")
.renderingMode(.original)
}
Button(action: {
}) {
Image("plus")
.renderingMode(.original)
}
iOS 13, Swift 5
You can set the button as disabled initially and then enable it using the same sort of logic I used here.
import SwiftUI
struct ContentView: View {
#State var changeColor = false
var body: some View {
TextView(changeColor: $changeColor)
}
}
struct TextView: View {
#Binding var changeColor: Bool
var body: some View {
Text("Hello World")
.foregroundColor(changeColor ? Color.black: Color.red)
.onAppear {
DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
self.changeColor.toggle()
}
}
}
}
You are almost there, you just need to use the .appear tag in your code to do this.