iOS中的Ionic应用程序无法使用Cordova-Plugin-Media播放本地音频

Question

我无法使用cordova-plugin-media播放离子音频，但这仅在iOS和本地音频中发生。

控制器非常简单，只需设置一个new Media并播放即可。 回调仅返回其参数的日志。

$scope.data = {};
$scope.playMedia = function(){
    // Get file path base for every each platform 
    var pathBase = ionic.Platform.platform().toLowerCase() === "android" ? "/android_asset/www/" : "";
    var source = pathBase + "audios/parts/99.mp3";
    console.log("source: " + source);

    // Set source and callbacks
    $scope.data.media = new Media(source, mediaSuccess, mediaError, mediaStatus);
    $scope.data.media.play();

    // Update media position every half second
    $interval(updatePosition, 500);
};

function updatePosition(){
    $scope.data.media.getCurrentPosition(function (position) {
        if (position > -1) {
            $scope.data.position = position;
            console.log(position);
        }
    });
};

介质状态返回2， 表示 Media.MEDIA_RUNNING ，因此存在文件并找到了文件，但是位置为0。

2016-03-04 17:58:21.358 Play Local Audio[2549:1228498] source: audios/parts/99.mp3
2016-03-04 17:58:21.374 Play Local Audio[2549:1228498] THREAD WARNING: ['Media'] took '14.875000' ms. Plugin should use a background thread.
2016-03-04 17:58:21.376 Play Local Audio[2549:1228657] Found resource '/var/mobile/Containers/Bundle/Application/E70EE8B6-F5A8-49F7-9A7D-3A963C3AD439/Play Local Audio.app/www/audios/parts/99.mp3' in the web folder.
2016-03-04 17:58:21.395 Play Local Audio[2549:1228657] Playing audio sample 'audios/parts/99.mp3'
2016-03-04 17:58:21.398 Play Local Audio[2549:1228657] Playing stream with AVPlayer & custom rate
2016-03-04 17:58:21.400 Play Local Audio[2549:1228498] mediaStatus:
2016-03-04 17:58:21.401 Play Local Audio[2549:1228498] 2
2016-03-04 17:58:21.401 Play Local Audio[2549:1228498] $scope.data.media:
2016-03-04 17:58:21.401 Play Local Audio[2549:1228498] {"id":"a15cc81b-fd6d-4e12-7e95-0361d0a977a1","src":"audios/parts/99.mp3","_duration":0,"_position":-1}
2016-03-04 17:58:21.866 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:22.341 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:22.842 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:23.343 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:23.845 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:24.346 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:24.847 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:25.348 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:25.850 Play Local Audio[2549:1228498] 0
2016-03-04 17:58:26.351 Play Local Audio[2549:1228498] 0

但是，如果我尝试使用外部音频： http://www.sample-videos.com/audio/mp3/crowd-cheering.mp3 ： http://www.sample-videos.com/audio/mp3/crowd-cheering.mp3则它可以工作。 这是我正在本地播放的音频。

    $scope.data.media = new Media('http://www.sample-videos.com/audio/mp3/crowd-cheering.mp3', mediaSuccess, mediaError, mediaStatus);

知道为什么吗？

Answer 1

这是影响iOS 9.2的插件的一个错误，我按照请求请求中的描述更改了两行，并播放了音频。

文件src/ios/CDVSound.m ，替换

第219行：

 CDVAudioFile* audioFile = [self audioFileForResource:resourcePath withId:mediaId doValidation:YES forRecording:NO]; 

第226行：

NSURL* resourceUrl = audioFile.resourceURL;

Answer 2

您好，还有另一种方法/ workAround可以解决此问题，如本文此处所述：

https://forum.ionicframework.com/t/ios-9-2-cordova-plugin-media-no-sound-fix-on-the-way/45100/1

在方法中：

- (void)startPlayingAudio:(CDVInvokedUrlCommand*)command

替换这些行：

从：

 if (audioFile.rate != nil){
    float customRate = [audioFile.rate floatValue];
    NSLog(@"Playing stream with AVPlayer & custom rate");
    [avPlayersetRate:customRate];
} else {
    NSLog(@"Playing stream with AVPlayer & custom rate");
    [avPlayer play];
}

至：

if (audioFile.rate != nil){
    float customRate = [audioFile.rate floatValue];
    NSLog(@"Playing stream with AVPlayer & custom rate");
    [audioFile.player setRate:customRate];
} else {
    NSLog(@"Playing stream with AVPlayer & custom rate");
    [audioFile.player play];
}

在此链接上，再次感谢答案的作者：

https://forum.ionicframework.com/t/ios-9-2-cordova-plugin-media-no-sound-fix-on-the-way/45100/1