We are developers of an app, we found that there's no LN prompt for users to install the app for the 1st time on ios18.
We used the following method to prompt the "allow/not allow" alert:
// Attempts to trigger the local network privacy alert.
///
/// This builds a list of link-local IPv6 addresses and then creates a connected
/// UDP socket to each in turn. Connecting a UDP socket triggers the local
/// network alert without actually sending any traffic.
///
/// This is a ‘best effort’ approach, and it handles errors by ignoring them.
/// There’s no guarantee that it’ll actually trigger the alert (FB8711182).
func triggerLocalNetworkPrivacyAlert() {
let addresses = selectedLinkLocalIPv6Addresses()
for address in addresses {
let sock6 = socket(AF_INET6, SOCK_DGRAM, 0)
guard sock6 >= 0 else { return }
defer { close(sock6) }
withUnsafePointer(to: address) { sa6 in
sa6.withMemoryRebound(to: sockaddr.self, capacity: 1) { sa in
_ = connect(sock6, sa, socklen_t(sa.pointee.sa_len)) >= 0
}
}
}
}
Topic:
App & System Services
SubTopic:
Networking