winJS（CameraCaptureUI）如何预览（完成）和SAVE（？）图片到磁盘？

Question

我经常研究并尝试了一些不起作用的东西。 所以我需要的是：

1. 得到照片（工作）
2. 显示为用户预览（工作）
3. 在图片库中创建图像（工作）
4. 将预览保存为本地图片文件夹（缺少）

感谢。

我拍摄照片并在页面上显示如下：

  function captureImage()

{

 //S1: Create a new Camera Capture UI Object

 var cam = Windows.Media.Capture.CameraCaptureUI();

 var name = document.getElementById('ticketnum').innerHTML+'.jpg';

 var folder = Windows.Storage.KnownFolders.picturesLibrary; //was windows.storage

 //S2: Perform an Async operation where the Capture

 // Image will be stored as file

cam.captureFileAsync(Windows.Media.Capture.CameraCaptureUIMode.photo)

 .done(function (data) {

 if (data)

 {

 //S3: Create a URL for the capture image

 // and assign it to the <Img>

 var urlpic= window.URL.createObjectURL(data);

document.getElementById('imgCapture').src

 = urlpic;

 //**save picture to memory as ticket number, creating new img, how to put the file inside?

folder.createFileAsync(name, Windows.Storage.CreationCollisionOption.replaceExisting) //creates new file?

 .then(function (file) {

//file.copyAndReplaceAsync(window.URL.createObjectURL(data));
// HOW TO SAVE IMAGE TO pictures library? 
 });


    }

 }

 , error);

document.getElementById('txtserver').value = "Done";

 //save image to memory?

 //clean up resources

}

Answer 1

以下是答案：

function testSavePictureDisk() {    
    // S1: Create a new Camera Capture UI Object
    var cam = Windows.Media.Capture.CameraCaptureUI();

    //location?
    var name = document.getElementById('ticketnum').innerHTML + '.jpg';

    var folder = Windows.Storage.KnownFolders.picturesLibrary; //was windows.storage

    // S2: Perform an Async operation where the Capture
    // Image will be stored as file
    folder.createFileAsync(name, 
        Windows.Storage.CreationCollisionOption.replaceExisting) //creates new file?
        .then(function (file) {
            cam.captureFileAsync(Windows.Media.Capture.CameraCaptureUIMode.photo)
               .done(function (data) {
                    if (data) {
                        //S3: Create a URL for the capture image
                        // and assign it to the <Img>
                        document.getElementById('imgCapture').src = window.URL.createObjectURL(data);

                        //**save picture to memory as ticket number
                        data.moveAndReplaceAsync(file);

                        //**end testing for local save
                    }
                }
            , error);

        document.getElementById('txtserver').value = "Done";

        //save image to memory?
        //clean up resources
    });//end of new file creation
}

步骤

1. 创建新文件
2. 拍摄照片并预览
3. 将图片移至文件