问题
What is the difference in using window.resolveLocalFileSystemURL
vs window.requestFileSystem
when downloading files with the cordova file plugin? I cant find any documentation on resolveLocalFileSystemURL but it works fine, and its easier to use?
Which one should I use for simple CRUD operations in a cordova app?
(I use cordova 3.4.0-0.1.3)
I use it like this:
function onResolveSuccess(fileEntry) {
fileEntry.file(function(file) {
var reader = new FileReader();
reader.onloadend = function(evt) {
var _machines = JSON.parse(evt.target.result);
machinesCache.setMachines(_machines.AllMainCategories);
};
reader.readAsText(file);
}, errorHandler);
};
window.resolveLocalFileSystemURL("cdvfile://localhost/persistent/machinedata/machines.json", onResolveSuccess, errorHandler);
回答1:
Looking at www/resolveLocalFileSystemURI.js
and www/requestFileSystem.js
in the file plugin repo, I would say that they are practically the same.
I'd suggest using resolveLocalFileSystemURL
if you want to access locations under cordova.file.*
(eg cordova.file.dataDirectory
), which is most of the time (if not always), and use requestFileSystem
if you need to have access to the root of the filesystem.
来源:https://stackoverflow.com/questions/23127292/window-resolvelocalfilesystemurl-vs-window-requestfilesystem