初始化

2026-09-15 15:44:13 +07:00
commit a23ba685e9
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+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:get/get.dart';
+import 'package:video_player/video_player.dart';
+
+/// 全屏播放页业务逻辑：横竖屏切换 + 后台自动暂停
+/// 注：[playCtr] 由外部页面持有并释放，本类只借用，绝不能 dispose
+class VideoFullLogic extends GetxController with WidgetsBindingObserver {
+  VideoFullLogic({required this.playCtr, this.isAutoV = true});
+
+  final VideoPlayerController playCtr;
+  final bool isAutoV; // true:按视频比例决定是否转横屏；false:强制转横屏
+
+  double get aspectRatio => playCtr.value.aspectRatio;
+
+  @override
+  void onInit() {
+    super.onInit();
+    WidgetsBinding.instance.addObserver(this);
+    // 横向视频(或调用方强制)才转横屏，竖屏视频保持竖屏全屏
+    if (aspectRatio > 1 || !isAutoV) {
+      SystemChrome.setEnabledSystemUIMode(SystemUiMode.manual, overlays: [SystemUiOverlay.bottom]);
+      SystemChrome.setPreferredOrientations([
+        DeviceOrientation.landscapeLeft,
+        DeviceOrientation.landscapeRight,
+      ]);
+    }
+    // 转屏后 Get.width/height 才是新值，下一帧刷一次让画面按新尺寸铺满
+    WidgetsBinding.instance.addPostFrameCallback((_) => update());
+  }
+
+  /// 切后台暂停，防止息屏/切走后声音还在外放
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    super.didChangeAppLifecycleState(state);
+    if (state == AppLifecycleState.paused) playCtr.pause();
+  }
+
+  /// 退出全屏：恢复竖屏 + 状态栏，再退页
+  void exitFullScreen() {
+    SystemChrome.setEnabledSystemUIMode(SystemUiMode.manual, overlays: [SystemUiOverlay.bottom, SystemUiOverlay.top]);
+    SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
+    Get.back();
+  }
+
+  @override
+  void onClose() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.onClose(); // playCtr 属于调用方，这里不释放
+  }
+}