iOS 播放本地音频总是提示找不到文件，android没有问题

let _createPlayer = plus.audio.createPlayer();  
            _createPlayer.setSessionCategory("ambient");  
            setTimeout(()=>{  
                let path = plus.io.convertLocalFileSystemURL("/static/media/englishErr.mp3");  
                _createPlayer.setStyles({src:path,volume:1})  
                console.log(_createPlayer.getStyles())  
                _createPlayer.play();  
            },1000)  
            _createPlayer.addEventListener('error', console.log)

报错：
09:48:27.481 [LOG] : {"code":-4,"message":"file does not exist"}

console.log(AudioObj.getStyles()) 的输出

{
"autoplay": false,
"backgroundControl": false,
"loop": false,
"src": "/Users/zhangyingjie/Library/Developer/CoreSimulator/Devices/8B48A4AE-50EB-4414-B274-EA6EEE13560E/data/Containers/Data/Application/17EAE375-D736-47A0-8683-AE04090AE9C7/Documents/Pandora/apps/3C24DB1C22535238AF57382AE9D89C46/www/static/media/englishErr.mp3",
"startTime": 0,
"volume": 1
}