javascript - 获取cordova目录中的文件列表

Question

function onDeviceReady() {
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFileSystemSuccess, onFileSystemFail);
}

function onFileSystemSuccess(fileSystem) {
    var directoryEntry = fileSystem.root;
    directoryEntry.getDirectory("MyDirectory", {create: true, exclusive: false}, onDirectorySuccess, onDirectoryFail);
}

function onDirectorySuccess(parent) {
    var directoryReader = parent.createReader();
    directoryReader.readEntries(success, fail);
}

function fail(error) {
    alert("Failed to list directory contents: " + error.code);
}

function success(entries) {
    if (entries.length == 0)
        console.log("No Records");
    else
    {
        for (var i = 0; i < entries.length; i++) {
            entries[i].file(function (file) {
                console.log("file.name " + file.name);
            })
        }
    }
    console.log('file list created');
}

function onDirectoryFail(error) {
    alert("Unable to create new directory: " + error.code);
}

function onFileSystemFail(evt) {
    console.log(evt.target.error.code);
}

使用上面的代码，我得到了文件列表。但问题在于这段代码是先执行“console.log('file list created')”，然后执行“console.log('file.name '+file.name)”。我需要列出文件名，然后列表创建信息，或者我需要知道列表何时完全创建。提前致谢。

Answer 1

只需将 console.log 放在 if 语句中：

function success(entries) {
    if (entries.length == 0)
        console.log("No Records");
    else
    {
        for (var i = 0; i < entries.length; i++) {
            entries[i].file(function (file) {
                console.log("file.name " + file.name);
            })
        }
        console.log('file list created');
    }
}