基于开源网易云API+Flutter写的一款音乐播放器（二）

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Warning: CocoaPods not installed. Skipping pod install.
  CocoaPods is used to retrieve the iOS and macOS platform side's plugin code that responds to your plugin usage on the Dart side.
  Without CocoaPods, plugins will not work on iOS or macOS.
  For more info, see https://flutter.dev/platform-plugins
To install see https://guides.cocoapods.org/using/getting-started.html#installation for instructions.

Exception: CocoaPods not installed or not in valid state.

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[ERROR:flutter/lib/ui/ui_dart_state.cc(198)] Unhandled Exception: AVPlayerItem.Status.failed
#0      MethodChannelAudioplayersPlatform._doHandlePlatformCall
package:audioplayers_platform_interface/method_channel_audioplayers_platform.dart:174
#1      MethodChannelAudioplayersPlatform.platformCallHandler
package:audioplayers_platform_interface/method_channel_audioplayers_platform.dart:147
#2      MethodChannel._handleAsMethodCall
package:flutter/鈥?services/platform_channel.dart:404
#3      MethodChannel.setMethodCallHandler.<anonymous closure>
package:flutter/鈥?services/platform_channel.dart:397
#4      _DefaultBinaryMessenger.setMessageHandler.<anonymous closure>
package:flutter/鈥?services/binding.dart:380
#5      _DefaultBinaryMessenger.setMessageHandler.<anonymous closure>
package:flutter/鈥?services/binding.dart:377
#6      _invoke2.<anonymous closure> (dart:ui/hooks.dart:190:15)
#7      _rootRun (dart:async/zone.dart:1426:13)
#8      _CustomZone.run (dart:async/zone.dart:1328:19)
#9      _CustomZone.runGuarded (dart:async/zone.dart:1236:7)
#10     _invoke2 (dart:ui/hooks.dart:189:10)
#11     _ChannelCallbackRecord.invoke (dart:ui/channel_buffers.dart:42:5)
#12     _Channel.push (dart:ui/channel_buffers.dart:132:31)
#13     ChannelBuffers.push (dart:ui/channel_buffers.dart:329:17)
#14     PlatformDispatcher._dispatchPlatformMessage (dart:ui/platform_dispatcher.dart:589:22)
#15     _dispatchPlatformMessage (dart:ui/hooks.dart:89:31)

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<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

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<key>com.apple.security.network.client</key>
    <true/>

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璺敱鎺у埗鍣?/h2>

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瑕佸疄鐜拌繖涓姛鑳斤紝鎴戜滑蹇呴』璁板綍鐢ㄦ埛鐨勬瘡涓€娆￠〉闈㈠垏鎹㈠拰tab鍒囨崲銆傛垜灏嗚繖涓涓烘娊璞′负RouteAction锛岄〉闈㈣烦杞槸PageRouteAction锛孴ab鍒囨崲鏄?code>TabRouteAction銆傝繖浜沘ction閮界粺涓€鐢?code>RouteControlManager绠＄悊锛岃繖鏍峰氨鑳藉湪鍓嶈繘鍜屽悗閫€鏃跺埄鐢ㄨ繖浜沘ction鏉ユ帶鍒堕〉闈㈢殑鍒囨崲浜嗐€?/p>

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class CustomNavigatorObserver extends NavigatorObserver {
  // push: route鏄皢瑕乸ush鐨勮矾鐢?
    @override
  void didPush(Route route, RoutepreviousRoute) {
    super.didPush(route, previousRoute);
    RouteControlManager().pushAction(PageRouteAction(navigator: route.navigator, settings: route.settings));
  }

  // pop: route鏄皢瑕佽pop鐨勮矾鐢?
  @override
  void didPop(Route route, RoutepreviousRoute) {
    super.didPop(route, previousRoute);
    RouteControlManager().popAction(PageRouteAction(navigator: route.navigator, settings: route.settings));
  }
}

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// push
Navigator.pushNamed(context, "B");

// pop锛岃繑鍥炲鑸爤鐨勪笂涓€灞?
Navigator.pop(context);

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鍥炲埌鑷畾涔夌殑NavigatorObserver涓紝杩欐椂锛屾垜浠啀杩涜Navigator.pushNamed(context, 鈥渟etting鈥?;鏃讹紝灏卞彲浠ュ湪CustomNavigatorObserver涓嫤鎴埌璺宠浆淇℃伅浜嗐€?/p>

flutter: [route]push --> ModelRoute(RouteSettings("setting", null), 
animation: AnimationController#68be1(鈻?0.000; for ModelRoute)), 
MaterialPageRoute<dynamic>(RouteSettings("/", null), 
animation: AnimationController#c6365(鈴?1.000; paused; 
for MaterialPageRoute<dynamic>(/)))

鑰?code>CustomNavigatorObserver鎴栬€呭洖璋冨嚱鏁颁腑鐨勫弬鏁?code>Route閮借兘鐩存帴鑾峰彇鍒?code>NavigatorState锛屽埌杩欓噷锛屾垜浠笉閫氳繃context鑰岀洿鎺ヨ幏鍙栧埌浜嗘帶鍒跺鑸殑NavigatorState銆?/p>

鐜板湪锛屾垜浠氨鍙互鍐欎袱涓柟娉曟潵鎺у埗鍓嶈繘鍜岃繑鍥炪€?/p>

杩斿洖锛岃皟鐢?code>navigator鐨?code>pop()銆?/p>

void back() {
    if (canBack()) {
      final current = _actions[_currentIndex];
      _currentIndex -= 1;
      if (current.type == RouteActionType.page) {
        PageRouteAction action = current as PageRouteAction;
        action.navigator?.pop();
      }
      notifyListeners();
    }
  }

鍓嶈繘锛岃皟鐢?code>navigator鐨?code>pushNamed鏂规硶銆?/p>

void forward() {
    if (canForward()) {
      _currentIndex += 1;
      final current = _actions[_currentIndex];
      if (current.type == RouteActionType.page) 
        PageRouteAction action = current as PageRouteAction;
        if (action.settings.name != null) {
          action.navigator?.pushNamed(action.settings.name!,
              arguments: action.settings.arguments);
        }
      } 
      notifyListeners();
    }
  }

杩欐牱锛屾垜浠氨鍙互鎼厤杩斿洖鍜屽墠杩涙寜閽紝閫氳繃璋冪敤back()鍜?code>forward()鏉ュ叏灞€鎺у埗椤甸潰鐨勫墠杩涘拰鍚庨€€浜嗭紝瀹岀編銆?/p>

姝岃瘝婊氬姩鍜屽畾浣?/h2>

鐭ラ亾姣忎竴琛岀殑楂樺害锛屼互鍙婃瓕璇嶅垪琛ㄧ殑楂樺害锛屽彲浠ラ€氳繃context鐨刦indRenderObject鏉ヨ幏鍙栨覆鏌撶粍浠剁殑灏哄銆?/p>

final ob = context.findRenderObject();
    if (ob != null && ob is RenderBox) {
      model?.size = ob.size;
    }

缁撳悎婊氬姩鐩戝惉NotificationListener<ScrollNotification>锛岃幏鐭ュ綋鍓嶇殑婊氬姩鍋忕Щ銆傝绠楀嚭闇€瑕佸亸绉荤殑璺濈锛岃皟鐢?code>ScrollController鐨?code>animateTo鍗冲彲瀹炵幇婊氬姩鍒版寚瀹氳鐨勬瓕璇嶅姛鑳姐€?/p>

scrollController.animateTo(offsety,
            duration: const Duration(milliseconds: 200), curve: Curves.ease);

涓嬭浇闊充箰

DreamMusic杩樺疄鐜颁簡闊充箰涓嬭浇鍔熻兘銆備笉杩囬亣鍒颁簡鏂囦欢鏉冮檺闂锛屾垜鍦ㄤ笅杞芥瓕鏇插皾璇曞啓鍏ユ湰鍦癉ownload鐩綍鏃讹紝鎶ヤ互涓嬮敊璇細

鍑虹幇寮傚父銆?
FileSystemException (FileSystemException: Cannot create file, path = '/Users/zl/Library/Containers/com.jinfeng.dreammusic.dreamMusic/Data/Downloads' (OS Error: Operation not permitted, errno = 1))

杩欐槸鍥犱负鎴戜滑娌℃湁璇诲啓鏂囦欢鐨勬潈闄愶紝闇€瑕佸幓淇敼涓嬬敤鎴风殑鏉冮檺銆?/p>

閫氳繃Apple鐨勫紑鍙戞枃妗ｆ壘鍒版湁鍏虫潈闄愰棶棰樼殑璇存槑銆傚叾涓湁涓巿鏉冪閽ョ殑key涓?code>com.apple.security.files.downloads.read-write 锛岃〃绀?strong>瀵圭敤鎴风殑涓嬭浇鏂囦欢澶圭殑璇?鍐欒闂潈闄?/strong>銆傞偅涔堬紝浣跨敤Xcode鎵撳紑Flutter椤圭洰涓殑mac搴旂敤锛屼慨鏀瑰伐绋嬬洰褰曚笅鐨?code>DebugProfile.entitlements鏂囦欢锛屽悜entitlements鏂囦欢涓坊鍔?code>com.apple.security.files.downloads.read-write锛屽苟灏嗗€艰缃负YES锛屼繚瀛樺悗閲嶅惎Flutter椤圭洰銆傚彂鐜板凡缁忓彲浠ュ悜涓嬭浇鐩綍涓鍐欐枃浠朵簡銆?/p>

褰撶劧锛岃繖鏄甯告搷浣溿€傝繕鏈変釜楠氭搷浣滃氨鏄叧闂郴缁熺殑娌欑洅鏈哄埗銆傚皢entitlements鏂囦欢鐨?code>App Sandbox璁剧疆涓篘O銆傝繖鏍锋垜浠氨鍙互璁块棶浠绘剰璺緞浜嗐€傚綋鐒跺叧闂簲鐢ㄧ殑娌欑洅涔熷氨鐩稿綋浜庡叧闂簡搴旂敤鐨勯槻鎶ゆ満鍒讹紝鍥犳杩欎釜閫夐」鎱庣敤銆?/p>

涓嬭浇姝屾洸鍚庯紝姝屾洸鐨勫悕瀛楃瓑淇℃伅濡備綍淇濆瓨锛?/h2>

杩欓噷鏈変袱涓柟妗堬紝涓€涓槸鍚屾椂淇濆瓨涓€涓猨son鏂囦欢锛岀敤浜庤褰曟瓕鏇蹭俊鎭紝杩欎釜鏂规鐨勭己鐐规槸鏁版嵁鍒嗘暎锛屽唴瀹瑰鏄撲涪澶便€傚彟涓€涓柟妗堟槸鐩存帴瀛樺叆mp3鏂囦欢鍐呴儴锛岀綉鏄撲簯闊充箰鐨勯煶涔愪笅杞芥槸杩欎箞瀹炵幇浜嗭紝浣跨敤id3搴撳彲浠ヨ鍙栧埌mp3鏂囦欢涓澶栧瓨鍌ㄧ殑淇°€侷D3瑙ｆ瀽鐩稿叧浠嬬粛

鐩墠鐢变簬鎶€鏈師鍥狅紝鏆傛椂閲囩敤浜嗕笅杞絤p3+json鐨勬柟寮忋€傚悗闈㈡湁鏃堕棿浼氬仛浼樺寲銆傝繖绉嶆柟寮忕壒鍒緷璧栦簬涓や釜鏂囦欢鐨勫畬鏁存€э紝姣曠珶mp3+json鐩稿綋浜庝竴棣栧畬鏁寸殑姝屻€傚洜姝reamMusic杩樺涓嬭浇鏂囦欢鍋氫簡鍒犻櫎鐨勭洃鍚紝閫氳繃涓嬭浇鏂瑰紡瀹炵幇銆?/p>

final stream =
          directory.watch(events: FileSystemEvent.delete, recursive: true);
      stream.listen((event) async {
//澶勭悊鍒犻櫎鍚庣殑閫昏緫
}

Show In Finder瀹炵幇

褰撴椂鐪嬪埌杩欎釜鍔熻兘锛岀涓€鍙嶅簲灏辨槸缃戜笂鎵炬枃浠舵搷浣滅浉鍏崇殑搴撱€傛瘮杈冩湁鍚嶇殑鏈?code>file_selector鍜?code>file_picker銆傝繖涓や釜閮芥彁渚涗簡鏂囦欢閫夋嫨鍔熻兘锛屼絾鏄病鏈夊崟绾殑鎵撳紑鏂囦欢鐩綍鐨勯€夐」銆傜劧鍚庢垜鐪嬩簡file_picker鐨勫疄鐜帮紝濂藉浼欙紝绔熺劧鏄洿鎺ラ€氳繃鍛戒护琛屽疄鐜扮殑锛岃繖褰撴椂灏辫鎴戠伒鎰熶竴闂紝鏈夊姙娉曚簡銆?/p>

open 鍛戒护 鎼炲畾涓€鍒囥€?/p>

class ShowInFinder {
  /// 鎵撳紑鐩綍
  static void open({StringinitialDirectory}) {
    if (initialDirectory?.isNotEmpty == true) {
      final type = FileSystemEntity.typeSync(initialDirectory!);
      if (type == FileSystemEntityType.file || type == FileSystemEntityType.link) {
        debugPrint("[finder]$initialDirectory, 涓嶆槸鐩綍");
        return;
      }
      if (type == FileSystemEntityType.notFound) {
        // 鎸囧畾鐩綍涓嶅瓨鍦紝鍒涘缓
        Directory(initialDirectory).create();
      }
    }
    String argument = initialDirectory ?'.';
    Process.run("open", [argument]);
  }
}

淇敼妗岄潰搴旂敤鐨勫浘鏍囧拰鍚嶇О

搴旂敤鍚嶇О鍜屽浘鏍囬兘闇€瑕佸師鐢熷伐绋嬩腑鍘婚厤缃紝杩欓噷涔熷氨鏄痬acos銆亀indows銆乴inux鐩綍銆?/p>

macOS閰嶇疆鐪嬭繖閲屻€?/p>

windows閰嶇疆鐪嬭繖閲屻€?/p>

Linux閰嶇疆鐪嬭繖閲屻€?/p>

杩欓噷鎴戝彧閰嶄簡macos鍜寃indows鐨勶紝姣曠珶璋佷細鍘荤敤linux杩愯杩欎釜椤圭洰鍛紒锛堝搱鍝堬紝鍏跺疄灏辨槸鎳掞級

鏈€鍚?/h2>

鍙傝€冩枃妗?/h2>

Mac娌欑洅鏈哄埗鍜屾潈闄愰厤缃?/p>

MP3鏂囦欢缁撴瀯瑙ｆ瀽(瓒呰缁?

MP3鏍囩鏍煎紡锛圛D3锛孉PE锛夎秴璇︾粏瑙ｉ噴