for sometime, preview is "collapsed", see attached snapshot
bill2022
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
Hi! I find this code does not work as expected on iOS 17 simulator and device. It was working correctly with iOS 16:
struct ContentView: View {
@State private var numberText = ""
var color: Color {
let result = (Int(numberText) ?? 0) <= 0
if result {
return .black
}
return .red
}
var body: some View {
VStack {
TextField("Enter a number", text: $numberText)
.font(.title)
.foregroundStyle(
color
)
Text("Font color will turn red if number > 0")
.foregroundColor(.gray)
}
.padding()
}
}
I tried a workaround and it works:
struct ContentView: View {
@State private var numberText = ""
@State private var color = Color.black
func updateColor() ->Color {
let result = (Int(numberText) ?? 0) <= 0
if result {
return .black
}
return .red
}
var body: some View {
VStack {
TextField("Enter a number", text: $numberText)
.font(.title)
.foregroundStyle(
color
)
.onChange(of:numberText) {
color = updateColor()
}
Text("Font color will turn red if number > 0")
.foregroundColor(.gray)
}
.padding()
}
}
I got the errors like
Type 'Trip' has no member 'preview', but the preview is defined in Trip.swift
comment all preview code with errors and the project can be compiled.
I test with a simple class and it can compile:
@Model
final class Book: Encodable {
var name: String
enum CodingKeys: CodingKey {
case name
}
public func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(name, forKey: .name)
}
}
Then I try with the Trip class from sample and it cause an error:
@Model final class Trip: Encodable {
:
enum CodingKeys: CodingKey {
case name, destination, endDate, startDate, bucketList
}
func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(name, forKey: .name)
try container.encode(destination, forKey: .destination)
try container.encode(endDate, forKey: .endDate)
try container.encode(startDate, forKey: .startDate)
try container.encode(bucketList as! Set<BucketListItem>, forKey: .bucketList)
}
And I got the error Ambiguous use of 'setValue(for:to:)'
I tried make BucketListItem and LivingAccommodation Encodable and still have error.