Initially, my task was to determine which type of connection is being used at the moment: 5G or 4G. And I found "CTTelephonyNetworkInfo().serviceCurrentRadioAccessTechnology" but there is a problem when the device has more than one sim.
My iPhone has two sims, one physical and one electronic.
I need to determine which one is used to access the network. I tried to use "CTTelephonyNetworkInfo().serviceCurrentRadioAccessTechnology" but it is a dictionary [String: String] that only indicates the connection of each of the cards, and it is not possible to find out which one is active from this dictionary. So how can I determine which of the two cards are currently being used to access the Internet?
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I'm trying to instantiate my model and I'm getting an error on the set first property
import Foundation
import SwiftData
@Model final class PointModel {
var x: CGFloat
var y: CGFloat
init(
x: CGFloat,
y: CGFloat
) {
self.x = x
self.y = y
}
}
extension PointModel {
static var preview: PointModel {
PointModel(x: 0, y: 0)
}
}
let point = PointModel(x: location.x, y: location.y)
{
get {
_$observationRegistrar.access(self, keyPath: \.x)
return self.getValue(for: \.x)
}
set {
_$observationRegistrar.withMutation(of: self, keyPath: \.x) {
self.setValue(for: \.x, to: newValue) **Thread 1: Fatal error: Illegal attempt to use a nil as an Attribute - x + 151.0**
}
}
}
Has anyone else experienced this problem?
Maybe someone knows how to solve this?