When I embedded a PhotosPickerView() in popover,
it won't works:
struct PhotoPickerTest: View {
@State private var selectedPhotoItem: PhotosPickerItem?
@State var isTaped: Bool = false
var body: some View {
Button("", systemImage: "plus") {
isTaped = true
}
.popover(isPresented: $isTaped) {
PhotoPickerView()
}
}
func PhotoPickerView() -> some View {
PhotosPicker(selection: $selectedPhotoItem) {
Image(systemName: "photo")
}
}
}
but if I just replace "popover" to "sheet", it works fine:
struct PhotoPickerTest: View {
@State private var selectedPhotoItem: PhotosPickerItem?
@State var isTaped: Bool = false
var body: some View {
Button("", systemImage: "plus") {
isTaped = true
}
.sheet(isPresented: $isTaped) {
PhotoPickerView()
}
}
func PhotoPickerView() -> some View {
PhotosPicker(selection: $selectedPhotoItem) {
Image(systemName: "photo")
}
}
}
I think it's a bug, and bothered me a lot, hope apple engineers can fix it.
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SwiftUI [[stichable]] metal shader & CIFilter written in metal extern"C" can't work at the same time
In my project, I used two metal shaders in two ways.
One is link to SwiftUI's modifier .colorEffect(ShaderLibrary.myShader()), which metal shader marked as [[stichable]].
Another one is a custom CIFilter, which kernel been written in external "C" closure.
Because custom CIFilter must add build rules so Xcode can compile it, so I added -fcikernel to Metal Compiler and -cikernel to Metal Linker from Build Settings, just like Apple's document told me that.
But the result is weird, if I add rules, custom CIFilter works, [[stichable]] shader doesn't work. if I delete rules, and comment out code of CIFilter(for avoiding warning), [[stichable]] shader works, but now I can't use my custom CIFilter.
Actually, once these two shaders works well in my project, but when I updated Xcode from 15 to 16, it became weird, the 2 shaders can't exist at same time. Even though I go back to Xcode 15, I can't save them.
I have no idea, please help, thank you.
XCode 16 / iOS 18 on iPhone 14 Pro
I'm doing a weather app, users can search locations for getting weather, but the problem is, the results only shows locations in my country, not in global. For example, I'm in China, I can't search New York, it just shows nothing. Here's my code:
@Observable
class SearchPlaceManager: NSObject {
var searchText: String = ""
let searchCompleter = MKLocalSearchCompleter()
var searchResults: [MKLocalSearchCompletion] = []
override init() {
super.init()
searchCompleter.resultTypes = .address
searchCompleter.delegate = self
}
@MainActor
func seachLocation() {
if !searchText.isEmpty {
searchCompleter.queryFragment = searchText
}
}
}
extension SearchPlaceManager: MKLocalSearchCompleterDelegate {
func completerDidUpdateResults(_ completer: MKLocalSearchCompleter) {
withAnimation {
self.searchResults = completer.results
}
}
}
Also, I've tried to set searchCompleter.region = MKCoordinateRegion( center: CLLocationCoordinate2D(latitude: 0, longitude: 0), span: MKCoordinateSpan(latitudeDelta: 180, longitudeDelta: 360) ), but it doesn't work.
let component = GestureComponent(DragGesture())
iOS: ☑️
visionOS: ❌
This bug from beta to public, please fix it.
If put a List in ScrollVIew, List won't appear:
import SwiftUI
struct BugView: View {
let numbers: [Int] = [0, 1, 2]
var body: some View {
ScrollView {
List(numbers, id: \.self) { number in
Text(number.description)
}
}
}
}
#Preview {
BugView()
}
It's much easier to use custom material to bridge metal shader onto Reality model than using LowLevelTexture does the same thing.
Why VisionOS doesn't support this material:
I want to step into portal world. I've know PortalCrossingComponent can make an entity to cross portal, but how to make device cross into portal world?
I want to record animation with entity, then export it to .usd without using Reality Composer Pro, how to achieve that?
I have a visionOS 2 project created on Xcode 16, when I updated to Xcode 26 beta5, I can't build it any more, every time it stuck in process like the picture shows below:
Already tried many methods to fix this issue, such as clear build folders, but don't work.
MacBook Air M2 / MacOS 26 beta5 / Xcode 26 beta5
On Xcode 26 and visionOS 26, apple provides observable property for Entity, so we can easily interact with Entity between RealityScene and SwiftUI, but there is a issue:
It's fine to observe Entity's position and scale properties in Slider, but can't observe orientation properties in Slider.
MacBook Air M2 / Xcode 26 beta6
Entity.animate() makes entity animation much easier, but in many cases, I want to break the progress because of some gestures, I couldn't find any way to do this, including tried entity.stopAllAnimations(), I have to wait till Entity.animate() completes.
iOS 26 / visionOS 26
I have a mesh based animation 3D model, that means every frame it’s a new mesh. I import it into RealityView, but can’t play it‘s animation, RealityKit tells me this model has no animations by using print(entity.availableAnimations).
.scrollTransition { view, phase in
view.opacity(phase.isIdentity ? 1 : 0)
.scaleEffect(phase.isIdentity ? 1 : 0.75)
}
Is there anyway to pass the phase.isIdentity to my @State bool property?
iOS 17
I can read the scrollPosition correctly, but scrollTo() doesn't work.
iOS 17, Xcode 15.2. Code like this below(can directly copy and paste):
import SwiftUI
struct PositionTest: View {
@State private var weathers = Weather.samples
@State private var scrollPosition: Weather.ID?
@State private var isTaped: Bool = false
var body: some View {
VStack {
Text("Scroll Position: " + (scrollPosition ?? "Cupertino"))
if !isTaped {
CollapsedView(
weathers: $weathers,
scrollPosition: $scrollPosition,
isTaped: $isTaped
)
} else {
ExpandedView(
weathers: $weathers,
scrollPosition: $scrollPosition,
isTaped: $isTaped
)
}
}
.font(.title)
.fontWeight(.semibold)
.animation(.default, value: isTaped)
}
}
#Preview {
PositionTest()
}
struct CollapsedView: View {
@Binding var weathers: [Weather]
@Binding var scrollPosition: Weather.ID?
@Binding var isTaped: Bool
var body: some View {
ScrollViewReader { proxy in
ScrollView {
VStack(spacing: 20) {
ForEach(weathers) { weather in
Text(weather.name)
.frame(width: 350, height: 227)
.foregroundStyle(.white)
.background(.blue.gradient)
.cornerRadius(40)
.id(weather.id as Weather.ID?)
.onTapGesture { isTaped.toggle() }
}
}
.frame(maxWidth: .infinity)
.scrollTargetLayout()
}
.scrollIndicators(.hidden)
.scrollTargetBehavior(.viewAligned)
.scrollPosition(id: $scrollPosition, anchor: .center)
.onAppear { proxy.scrollTo(scrollPosition, anchor: .center) }
}
}
}
struct ExpandedView: View {
@Binding var weathers: [Weather]
@Binding var scrollPosition: Weather.ID?
@Binding var isTaped: Bool
var body: some View {
ScrollViewReader { proxy in
ScrollView {
VStack(spacing: 20) {
ForEach(weathers) { weather in
Text(weather.name)
.frame(width: 250, height: 227)
.foregroundStyle(.white)
.background(.indigo.gradient)
.clipShape(.circle)
.id(weather.id as Weather.ID?)
.onTapGesture { isTaped.toggle() }
}
}
.frame(maxWidth: .infinity)
.scrollTargetLayout()
}
.scrollIndicators(.hidden)
.scrollTargetBehavior(.viewAligned)
.scrollPosition(id: $scrollPosition, anchor: .center)
.onAppear { proxy.scrollTo(scrollPosition, anchor: .center) }
}
}
}
struct Weather: Identifiable {
var id: String { name }
let name: String
let temp: Int
static let samples = [
Weather(name: "Cupertino", temp: 12),
Weather(name: "New York", temp: 13),
Weather(name: "ShangHai", temp: 14),
Weather(name: "London", temp: 15),
Weather(name: "Las Vegas", temp: 16),
]
}
I found if I simply change the VStack to LazyVStack in both CollapsedView() and ExpandedView(), the scrollTo() method works fine.
But in my project, for some reason I don't want to use LazyVStack, just want to use VStack, is there any way to make scorllTo() works in VStack?
I want to use List(data:, editActions:, rowContent:), the data: needs a $property, but I can't pass $persons in there directly. Is there any way to solve like this below:
import SwiftUI
import SwiftData
struct BindableTest: View {
@Environment(\.modelContext) var modelContext
@Query var persons: [Person]
var body: some View {
VStack {
Button("Add") {
let person = Person(name: "test", age: 12)
modelContext.insert(person)
}
List($persons, editActions: .all) { $person in
Text(person.name)
Text(person.age.formatted())
}
}
}
}
iOS 17