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school-attendance/ios/Runner/ProximityMonitorPlugin.swift
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// 🛡️ iOS 근접센서로 "주머니 감시"를 흉내내기 위한 네이티브 플러그인.
// UIDevice의 근접센서를 켜면 통화 중처럼 화면이 자동으로 꺼지고 켜지는데,
// 그 상태 변화(가까움/멀어짐)를 Dart 쪽 EventChannel로 그대로 흘려보낸다.
import Flutter
import UIKit
class ProximityMonitorPlugin: NSObject, FlutterPlugin, FlutterStreamHandler {
private var eventSink: FlutterEventSink?
static func register(with registrar: FlutterPluginRegistrar) {
let instance = ProximityMonitorPlugin()
let methodChannel = FlutterMethodChannel(
name: "proximity_monitor",
binaryMessenger: registrar.messenger()
)
methodChannel.setMethodCallHandler(instance.handle)
let eventChannel = FlutterEventChannel(
name: "proximity_monitor/events",
binaryMessenger: registrar.messenger()
)
eventChannel.setStreamHandler(instance)
}
func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
switch call.method {
case "start":
UIDevice.current.isProximityMonitoringEnabled = true
result(nil)
case "stop":
UIDevice.current.isProximityMonitoringEnabled = false
result(nil)
default:
result(FlutterMethodNotImplemented)
}
}
func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
eventSink = events
NotificationCenter.default.addObserver(
self,
selector: #selector(proximityStateChanged),
name: UIDevice.proximityStateDidChangeNotification,
object: nil
)
return nil
}
func onCancel(withArguments arguments: Any?) -> FlutterError? {
NotificationCenter.default.removeObserver(
self,
name: UIDevice.proximityStateDidChangeNotification,
object: nil
)
eventSink = nil
return nil
}
@objc private func proximityStateChanged() {
eventSink?(UIDevice.current.proximityState)
}
}