Javascript 如何使用dropzone.js预加载图像

我想预加载一些图像，然后删除它们。我看过一些教程，但似乎不起作用。我的php端是正确的，为了排除故障，我直接引用了我的文件名和大小。还是什么都没发生

如果你知道这件事，请帮助我。谢谢

Dropzone.options.myAwesomeDropzone  = {

init: function() {
// var thisDropzone = this;

$.get(getPic_url, function(data) {
     $.each(data, function(key,value){ //loop through it

        var mockFile = { name: 'surf-1477342168.jpg', size: 5398538 };    // here we get the file name and size as response 
        Dropzone.options.myAwesomeDropzone.emit("addedfile", mockFile);

// thisDropzone.options.addedfile.call(thisDropzone, mockFile);
// thisDropzone.options.thumbnail.call(thisDropzone, mockFile, "__UPLOAD__/surf-1477342168.jpg");
    });
});
},

var mockFile = { name: 'surf-1477342168.jpg', size: 5398538 };

// Call the default addedfile event handler
thisDropzone.emit("addedfile", mockFile);

// And optionally show the thumbnail of the file:
thisDropzone.emit("thumbnail", mockFile, "__UPLOAD__/surf-1477342168.jpg");
},