I'm doing a dead simple bar chart. It will show one bar per hour for a few days. The bar chart seems to have a bug where it will overlap the bars as soon as the overall width of the chart reaches some hardcoded value. The chart has .chartScrollableAxes(.horizontal) so horizontal space is no issue, there's infinite amounts of it.
This screenshot shows the same content, but the bottom one has 25pt wide bars and the top one 16pt. 16 is the last width before they started overlapping.
To test play with numberOfValues as well as the fixed widths for the BarMark:s. Under no circumstances should the bars overlap unless I tell it to, it should use some configurable minimum spacing between bars. In my real case I do not artificially color the bars like this and the chart is really hard to read.
I've tried to look in the docs, but most modifiers are totally undocumented and I can't seem to find anything that would apply. By setting .chartXVisibleDomain to some really low value I can force it to spread the bars out more, but then the my bar width is not honoured.
import SwiftUI
import Charts
struct Value: Hashable {
let x: Int
let y: Int
}
struct ContentView: View {
let values: [Value]
let colors: [Color] = [.red, .green, .blue]
var body: some View {
VStack {
Chart {
ForEach(values, id: \.self) { value in
BarMark(
x: .value("X", value.x),
y: .value("Y", value.y),
width: .fixed(16)
)
.foregroundStyle(colors[value.x % colors.count])
}
}
.chartScrollableAxes(.horizontal)
Chart {
ForEach(values, id: \.self) { value in
BarMark(
x: .value("X", value.x),
y: .value("Y", value.y),
width: .fixed(25)
)
.foregroundStyle(colors[value.x % colors.count])
}
}
.chartScrollableAxes(.horizontal)
}
.padding()
}
}
#Preview {
var rnd = SystemRandomNumberGenerator()
let numberOfValues = 50
var values: [Value] = []
for index in 0 ..< numberOfValues {
values.append(Value(x: index, y: Int(rnd.next() % 50)))
}
return ContentView(values: values)
}
Example with bars the same color. It's pretty much unusable.
null_pointer
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iOS 17.4.1, iPhone 15 Pro.
I pick photos from the user's photo library using:
...
.photosPicker(isPresented: $addPhotos, selection: $pickedPhotos, matching: .images)
.onChange(of: pickedPhotos) {
import(photoItems: pickedPhotos)
}
The picker UI works ok, but then when I import the photos:
private func import(photoItems: [PhotosPickerItem]) {
for photoItem in photoItems {
Log.debug("picked: \(photoItem)")
Task {
do {
let imageData = try await photoItem.loadTransferable(type: Data.self)
guard let imageData else {
Log.error("failed to load image data")
return
}
guard let image = UIImage(data: imageData) else {
Log.error("failed to create image from data")
return
}
// use image
....
}
catch {
Log.error("failed to load image data: \(error)")
}
}
}
}
Logging the picked photo gives:
PhotosPickerItem(_itemIdentifier: "C7E2F753-43F6-413D-BA42-509C60BE9D77/L0/001", _shouldExposeItemIdentifier: false, _supportedContentTypes: [<_UTCoreType 0x1ebcd1c10> public.jpeg (not dynamic, declared), <_UTCoreType 0x1ebcd1d70> public.heic (not dynamic, declared), <UTType 0x300fe0430> com.apple.private.photos.thumbnail.standard (not dynamic, declared), <UTType 0x300fe03f0> com.apple.private.photos.thumbnail.low (not dynamic, declared)], _itemProvider: <PUPhotosFileProviderItemProvider: 0x303fdff00> {types = (
"public.jpeg",
"public.heic",
"com.apple.private.photos.thumbnail.standard",
"com.apple.private.photos.thumbnail.low"
)})
Looks like there's a valid photo? But then the loadTransferable() call fails with:
5C9D59CB-3606-48C1-9B37-1F18D642B3AD grantAccessClaim reply is an error: Error Domain=NSCocoaErrorDomain Code=4101 "Couldn’t communicate with a helper application." UserInfo={NSUnderlyingError=0x308244f30 {Error Domain=PFPAssetRequestErrorDomain Code=0 "The operation couldn’t be completed. (PFPAssetRequestErrorDomain error 0.)" UserInfo={NSURL=file:///private/var/mobile/Containers/Shared/AppGroup/36CF50FB-38FC-440E-9662-35C23B5E636C/File%20Provider%20Storage/photospicker/uuid=C7E2F753-43F6-413D-BA42-509C60BE9D77&library=1&type=1&mode=2&loc=true&cap=true.jpeg, NSLocalizedDescription=The operation couldn’t be completed. (PFPAssetRequestErrorDomain error 0.)}}}
Error loading
public.data:
Error Domain=NSItemProviderErrorDomain Code=-1000 "Cannot load representation of type public.jpeg" UserInfo={NSLocalizedDescription=Cannot load representation of type public.jpeg, NSUnderlyingError=0x3081a2550 {Error Domain=NSCocoaErrorDomain Code=4101 "Couldn’t communicate with a helper application." UserInfo={NSUnderlyingError=0x308244f30 {Error Domain=PFPAssetRequestErrorDomain Code=0 "The operation couldn’t be completed. (PFPAssetRequestErrorDomain error 0.)" UserInfo={NSURL=file:///private/var/mobile/Containers/Shared/AppGroup/36CF50FB-38FC-440E-9662-35C23B5E636C/File%20Provider%20Storage/photospicker/uuid=C7E2F753-43F6-413D-BA42-509C60BE9D77&library=1&type=1&mode=2&loc=true&cap=true.jpeg, NSLocalizedDescription=The operation couldn’t be completed. (PFPAssetRequestErrorDomain error 0.)}}}}}
2024-04-03 12:16:07.8010 error PhotosView.import: failed to load image data: importNotSupported
[
As usual I rebooted my phone as these things tend to be pretty buggy in iOS, but same error. Note this is not in a simulator which seems to have long standing bugs related to photo picking, this is on a freshly upgraded 17.4.1 device.
I can't find any documentation related to these errors and all googling comes up with a few other cases but no solutions. Should this API actually work or is it better to go back to the old UIKit stuff? I use loadTransferable(type: Data.self) as UIImage.self is not Transferable and this hack has seemed to work ok for some months.