Question

我在Android上测试，我有：

function initialize(){
    console.log('into initialize');
    document.addEventListener('deviceready', onDeviceReady, false);
}

function onDeviceReady(e){
    window.requestFileSystem(LocalFileSystem.TEMPORARY, 0, onSuccess, errorHandler);
}

function onSuccess(fs){
    fs.root.getFile('log.txt',{},function(fileEntry){console.log('the file is: ' + fileEntry.isFile);},errorHandler);
    fs.root.getDirectory('MyPictues',{},function(dirEntry){if(!dirEntry.isDirectory){console.log('My Pictures is not a directory');} else {console.log('My Pictures is a directory');}},errorHandler);
}

function errorHandler(e) {
  var msg = '';

  switch (e.code) {
    case FileError.QUOTA_EXCEEDED_ERR:
      msg = 'QUOTA_EXCEEDED_ERR';
      break;
    case FileError.NOT_FOUND_ERR:
      msg = 'NOT_FOUND_ERR';
      break;
    case FileError.SECURITY_ERR:
      msg = 'SECURITY_ERR';
      break;
    case FileError.INVALID_MODIFICATION_ERR:
      msg = 'INVALID_MODIFICATION_ERR';
      break;
    case FileError.INVALID_STATE_ERR:
      msg = 'INVALID_STATE_ERR';
      break;
    default:
      msg = 'Unknown Error';
      break;
  };
  console.log('Error: ' + msg);
}

我在加载文档时调用initialize（）。奇怪的是在if这一行：

fs.root.getDirectory('MyPictues',{},function(dirEntry){if(!dirEntry.isDirectory){console.log('My Pictures is not a directory');} else {console.log('My Pictures is a directory');}},errorHandler);

我在我的根目录中有一个名为＆＃34; MyPictures＆＃34;的目录，在我上面拼错了它试图验证是否＆＃34; MyPictues＆＃34;存在，但我得到了'NOT_FOUND_ERR＆＃39;从交换机而不是简单地获取日志：＆＃39;我的图片不是目录＆＃39;。如果我在没有拼错名称的情况下进行测试，我会得到正确的行为。

Answer 1

不要在文档加载时调用initialize（）函数，写

document.addEventListener('deviceready', onDeviceReady, false);

在函数外部，在写入onDeviceReady方法后，将在设备准备好时调用那个时候你不会得到任何错误。如

 <script>
 document.addEventListener('deviceready', onDeviceReady, false);

 function onDeviceReady(e){
   window.requestFileSystem(LocalFileSystem.TEMPORARY, 0, onSuccess, errorHandler);
}

function onSuccess(fs){
  fs.root.getFile('log.txt',{},function(fileEntry){console.log('the file is: ' +     fileEntry.isFile);},errorHandler);
  fs.root.getDirectory('MyPictues',{},function(dirEntry){if(!dirEntry.isDirectory){console.log('My Pictures is not a directory');} else {console.log('My Pictures is a directory');}},errorHandler);
 }

function errorHandler(e) {
 var msg = '';

switch (e.code) {
case FileError.QUOTA_EXCEEDED_ERR:
  msg = 'QUOTA_EXCEEDED_ERR';
  break;
case FileError.NOT_FOUND_ERR:
  msg = 'NOT_FOUND_ERR';
  break;
case FileError.SECURITY_ERR:
  msg = 'SECURITY_ERR';
  break;
case FileError.INVALID_MODIFICATION_ERR:
  msg = 'INVALID_MODIFICATION_ERR';
  break;
case FileError.INVALID_STATE_ERR:
  msg = 'INVALID_STATE_ERR';
  break;
default:
  msg = 'Unknown Error';
  break;
 };
  console.log('Error: ' + msg);
 }
 </script>

Phonegap / Cordova文件系统dirEntry.isDirectory应该在完全错误时生成错误

1 个答案: