I have a crash when trying to use a class that contains iOS 14 only elements on iOS 12.
The class looks like this (redacted some irrelevant stuff)
public class AssetFuture {
public enum AssetRepresentation {
case asset(asset: PHAsset)
@available(iOS 14, *)
case result(result: PHPickerResult)
}
@available(*, deprecated, message: "Use assetRepresentation instead")
public var asset: PHAsset! {
switch assetRepresentation {
case .asset(asset: let asset):
return asset
default:
return nil
}
}
public let assetRepresentation: AssetRepresentation
init(asset: PHAsset) {
self.assetRepresentation = .asset(asset: asset)
}
@available(iOS 14, *)
init(pickerResult: PHPickerResult) {
self.assetRepresentation = .result(result: pickerResult)
}
Is my way of wrapping the iOS14 only elements incorrect ?
It crashes with this stack trace:
Thread 1 Queue : com.apple.main-thread (serial)
#0 0x0000000100520748 in __abort_with_payload ()
#1 0x000000010051fcf8 in abort_with_payload_wrapper_internal ()
#2 0x000000010051fd2c in abort_with_payload ()
#3 0x00000001004dcb40 in dyld::halt(char const*) ()
#4 0x00000001004dcc6c in dyld::fastBindLazySymbol(ImageLoader**, unsigned long) ()
#5 0x00000001f126f708 in _dyld_fast_stub_entry(void*, long) ()
#6 0x00000001f126e210 in dyld_stub_binder ()
#7 0x0000000100637654 in type metadata completion function for AssetFuture.AssetRepresentation ()
The whole project can be seen here: https://github.com/eure/AssetsPicker/tree/iOS14
Enums don't support unavailable types
User something else.
Ex:
public enum AssetRepresentation {
public struct PHPickerResultWrapper {
private let result: Any
@available(iOS 14, *)
public var value: PHPickerResult {
return result as! PHPickerResult
}
@available(iOS 14, *)
fileprivate init(_ result: PHPickerResult) {
self.result = result
}
}
case asset(asset: PHAsset)
@available(iOS 14, *)
case result(object: PHPickerResultWrapper)
}