After upgrade to Xcode 11 beta 6, DefaultPicker is behaving like a wheelPicker
var colors = ["Mumbai", "Delhi", "Chennai", "Hyderabad"]
#State private var selectedColor = 0
var body: some View {
VStack {
Picker(selection: $selectedColor, label: Text("Please choose a city")) {
ForEach(0 ..< colors.count) {
Text(self.colors[$0])
}.pickerStyle(DefaultPickerStyle())
}
}
}
}
I wanted single list row that navigates into a new list of possible optionsPicker
I found the issue added the picker inside Form, here the final code
#State private var selectedColor = 0
var body: some View {
NavigationView {
Form {
Picker(selection: $selectedColor, label: Text("Please choose a city")) {
ForEach(0 ..< colors.count) {
Text(self.colors[$0])
}.pickerStyle(DefaultPickerStyle())
}
}
}
}
I don't know what you are exactly trying to achieve but I guess you want to use segement picker.
replace
DefaultPickerStyle()
with
SegmentedPickerStyle()
Related
Currently I've a picker included in a Section included in a Form what I'm trying to reach is to align the selected value of the picker to the leading in both iOS 13 and 14, I've tried many solutions such as labelsHidden() but with no result, kindly find the code sample that generates the following screenshot on iOS 14, any help would be appreciated
struct ContentView: View {
#State private var selectedStrength = "Mild"
let strengths = ["Mild", "Medium", "Mature"]
var body: some View {
NavigationView {
Form {
Section {
Picker("", selection: $selectedStrength) {
ForEach(strengths, id: \.self) {
Text($0)
}
}
}
}
}
}
}
Use the Text() with a Spacer() in a HStack()
struct ContentView: View {
#State private var selectedStrength = "Mild"
let strengths = ["Mild", "Medium", "Mature"]
var body: some View {
NavigationView {
Form {
Section {
Picker("", selection: $selectedStrength) {
ForEach(strengths, id: \.self) { t in
HStack {
Text(t)
Spacer()
}
}
}
}
}
}
}
}
You have to use .frame() and .labelsHidden()
struct ContentView: View {
#State private var selectedStrength = "Mild"
let strengths = ["Mild", "Medium", "Mature"]
var body: some View {
NavigationView {
Form {
Section {
Picker("", selection: $selectedStrength) {
ForEach(strengths, id: \.self) {
Text($0)
}
}
.frame(width: 160, alignment: .leading)
.labelsHidden()
}
}
}
}
}
tested on IOS 16
Is there a way to fix the incomplete separator in the selected row? the issue is in simulator and real device.
Xcode 12.4 and iOS 14.4
struct ContentView: View {
var numbers = ["1", "2", "3", "4"]
#State private var selectedIndex = 0
var body: some View {
NavigationView {
Form {
Section {
Picker(selection: $selectedIndex, label: Text("Test")) {
ForEach(0 ..< numbers.count) {
Text(self.numbers[$0])
}
}
}
}
}
}
}
I have an issue using a sheet inside a ForEach. Basically I have a List that shows many items in my array and an image that trigger the sheet. The problem is that when my sheet is presented it only shows the first item of my array which is "Harry Potter" in this case.
Here's the code
struct ContentView: View {
#State private var showingSheet = false
var movies = ["Harry potter", "Mad Max", "Oblivion", "Memento"]
var body: some View {
NavigationView {
List {
ForEach(0 ..< movies.count) { movie in
HStack {
Text(self.movies[movie])
Image(systemName: "heart")
}
.onTapGesture {
self.showingSheet = true
}
.sheet(isPresented: self.$showingSheet) {
Text(self.movies[movie])
}
}
}
}
}
}
There should be only one sheet, so here is possible approach - use another sheet modifier and activate it by selection
Tested with Xcode 12 / iOS 14 (iOS 13 compatible)
extension Int: Identifiable {
public var id: Int { self }
}
struct ContentView: View {
#State private var selectedMovie: Int? = nil
var movies = ["Harry potter", "Mad Max", "Oblivion", "Memento"]
var body: some View {
NavigationView {
List {
ForEach(0 ..< movies.count) { movie in
HStack {
Text(self.movies[movie])
Image(systemName: "heart")
}
.onTapGesture {
self.selectedMovie = movie
}
}
}
.sheet(item: self.$selectedMovie) {
Text(self.movies[$0])
}
}
}
}
I changed your code to have only one sheet and have the selected movie in one variable.
extension String: Identifiable {
public var id: String { self }
}
struct ContentView: View {
#State private var selectedMovie: String? = nil
var movies = ["Harry potter", "Mad Max", "Oblivion", "Memento"]
var body: some View {
NavigationView {
List {
ForEach(movies) { movie in
HStack {
Text(movie)
Image(systemName: "heart")
}
.onTapGesture {
self.selectedMovie = movie
}
}
}
.sheet(item: self.$selectedMovie, content: { selectedMovie in
Text(selectedMovie)
})
}
}
}
Wanted to give my 2 cents on the matter.
I was encountering the same problem and Asperi's solution worked for me.
BUT - I also wanted to have a button on the sheet that dismisses the modal.
When you call a sheet with isPresented you pass a binding Bool and so you change it to false in order to dismiss.
What I did in the item case is I passed the item as a Binding. And in the sheet, I change that binding item to nil and that dismissed the sheet.
So for example in this case the code would be:
var movies = ["Harry potter", "Mad Max", "Oblivion", "Memento"]
var body: some View {
NavigationView {
List {
ForEach(0 ..< movies.count) { movie in
HStack {
Text(self.movies[movie])
Image(systemName: "heart")
}
.onTapGesture {
self.selectedMovie = movie
}
}
}
.sheet(item: self.$selectedMovie) {
Text(self.movies[$0])
// My addition here: a "Done" button that dismisses the sheet
Button {
selectedMovie = nil
} label: {
Text("Done")
}
}
}
}
Consider the following project with two views. The first view presents the second one:
import SwiftUI
struct ContentView: View {
private let data = 0...1000
#State private var selection: Set<Int> = []
#State private var shouldShowSheet = false
var body: some View {
self.showSheet()
//self.showPush()
}
private func showSheet() -> some View {
Button(action: {
self.shouldShowSheet = true
}, label: {
Text("Selected: \(selection.count) items")
}).sheet(isPresented: self.$shouldShowSheet) {
EditFormView(selection: self.$selection)
}
}
private func showPush() -> some View {
NavigationView {
Button(action: {
self.shouldShowSheet = true
}, label: {
NavigationLink(destination: EditFormView(selection: self.$selection),
isActive: self.$shouldShowSheet,
label: {
Text("Selected: \(selection.count) items")
})
})
}
}
}
struct EditFormView: View {
private let data = 0...1000
#Binding var selection: Set<Int>
#State private var editMode: EditMode = .active
init(selection: Binding<Set<Int>>) {
self._selection = selection
}
var body: some View {
List(selection: self.$selection) {
ForEach(data, id: \.self) { value in
Text("\(value)")
}
}.environment(\.editMode, self.$editMode)
}
}
Steps to reproduce:
Create an app with the above two views
Run the app and present the sheet with the editable list
Select some items at random indexes, for example a handful at index 0-10 and another handful at index 90-100
Close the sheet by swiping down/tapping back button
Open the sheet again
Scroll to indexes 90-100 to view the selection in the reused cells
Expected:
The selected indexes as you had will be in “selected state”
Actual:
The selection you had before is not marked as selected in the UI, even though the binding passed to List contains those indexes.
This occurs both on the “sheet” presentation and the “navigation link” presentation.
If you select an item in the list, the “redraw” causes the original items that were originally not shown as selected to now be shown as selected.
Is there a way around this?
It looks like EditMode bug, worth submitting feedback to Apple. The possible solution is to use custom selection feature.
Here is a demo of approach (modified only part). Tested & worked with Xcode 11.4 / iOS 13.4
struct EditFormView: View {
private let data = 0...1000
#Binding var selection: Set<Int>
init(selection: Binding<Set<Int>>) {
self._selection = selection
}
var body: some View {
List(selection: self.$selection) {
ForEach(data, id: \.self) { value in
self.cell(for: value)
}
}
}
// also below can be separated into standalone view
private func cell(for value: Int) -> some View {
let selected = self.selection.contains(value)
return HStack {
Image(systemName: selected ? "checkmark.circle" : "circle")
.foregroundColor(selected ? Color.blue : nil)
.font(.system(size: 24))
.onTapGesture {
if selected {
self.selection.remove(value)
} else {
self.selection.insert(value)
}
}.padding(.trailing, 8)
Text("\(value)")
}
}
}
I'm pretty sure this is a bug in SwiftUI, but I wondered if anyone has encountered it and figured out a workaround. My normal use case is to have a search field appear, but I've simplified it to the point where a simple text string exhibits the bug.
Create a single-view app, copy this into ContentView, and run it. Tap the search icon twice, then scroll the view; you'll see the text scrolling UNDER the title.
import SwiftUI
struct ContentView: View {
private var items = (0 ... 50).map {String($0)}
#State private var condition = false
var searchButton: some View {
Button(action: {self.condition.toggle()}) {
Image(systemName: "magnifyingglass").imageScale(.large)
}
}
var body: some View {
NavigationView {
VStack {
if condition {
Text("Peekaboo")
}
List {
ForEach(items, id: \.self) {item in
HStack {
Text(item)
}
}
}
}
.navigationBarTitle("List of Items")
.navigationBarItems(leading: searchButton)
}
}
}
Maybe it is a bug, submit feedback to Apple, but currently this is how NavigationView behaves - it collapses navigation bar only if its top content is List/ScrollView/Form. So to solve the issue move your VStack either into a List or out of NavigationView
1)
var body: some View {
NavigationView {
List {
if condition {
Text("Peekaboo")
}
ForEach(items, id: \.self) {item in
2)
var body: some View {
VStack {
if condition {
Text("Peekaboo")
}
NavigationView {
List {
It seems that a View cannot cope with variable number of views.
A workaround this strange behavior is this:
import SwiftUI
struct ContentView: View {
private var items = (0 ... 50).map {String($0)}
#State private var condition = false
var searchButton: some View {
Button(action: {self.condition.toggle()}) {
Image(systemName: "magnifyingglass").imageScale(.large)
}
}
var body: some View {
NavigationView {
VStack {
if condition {
Text("Peekaboo")
} else {
Text("")
}
// or use this Text(condition ? "Peekaboo" : "")
List {
ForEach(items, id: \.self) {item in
HStack {
Text(item)
}
}
}
}
.navigationBarTitle("List of Items")
.navigationBarItems(leading: searchButton)
}
}
}
Let me know if it works, if not let us know what device/system you are using. Tested with Xcode 11.6 beta, Mac 10.15.5, target ios 13.5 and mac catalyst.