我们使用phonegap制作了一个Win8应用程序。该应用程序还引用了一个用于执行某些异步任务的Windows运行时组件。该应用程序具有摄像头功能,在成功回调功能中调用摄像头,拍摄图片,然后将图片显示在屏幕上。当直接从visualstudioexpress运行时,一切都非常完美。当我们创建应用程序包并使用metro-sideloader或powershell进行部署时,就会出现问题。永远不会调用相机成功回调函数。调用相机的代码是这样的:
CameraService = function() {
var that = {};
that.invokecamera = function(callback) {
try {
GLOBALS.callback = callback;
if (GLOBALS.Ready) {
navigator.camera.getPicture(that.onSuccess, GLOBALS.ThrowException, {
quality : 50,
saveToPhotoAlbum : true,
destinationType : Camera.DestinationType.FILE_URI
});
}
} catch (err) {
alert(err);
} finally {
}
}
that.onSuccess=function(imageURI) {
GLOBALS.ImagePath = imageURI;
GLOBALS.callback(imageURI);
}
return that;
}
好的,所以我解决了这里提到的问题:
已安装应用的问题
为了解决这个问题,我,正如在链接中提到的替换
Windows.Storage.StorageFolder.getFolderFromPathAsync(packageId.path).done(function (storageFolder) {
带
var storageFolder = Windows.Storage.ApplicationData.current.localFolder;
在cordova.js文件中。我使用的是cordova 2.4.0。
一个更详细的示例
Windows.Storage.StorageFolder.getFolderFromPathAsync(packageId.path).done(function (storageFolder) {
storageFolder.createFileAsync(tempPhotoFileName, Windows.Storage.CreationCollisionOption.generateUniqueName).done(function (file) {
file.openAsync(Windows.Storage.FileAccessMode.readWrite).done(function (fileStream) {
Windows.Storage.Streams.RandomAccessStream.copyAndCloseAsync(_stream, fileStream).done(function () {
var _imageUrl = URL.createObjectURL(file);
successCallback(_imageUrl);
}, function () { errorCallback("Resize picture error."); });
}, function () { errorCallback("Resize picture error."); });
}, function () { errorCallback("Resize picture error."); });
});
成为
var storageFolder = Windows.Storage.ApplicationData.current.localFolder;
storageFolder.createFileAsync(tempPhotoFileName, Windows.Storage.CreationCollisionOption.generateUniqueName).done(function (file) {
file.openAsync(Windows.Storage.FileAccessMode.readWrite).done(function (fileStream) {
Windows.Storage.Streams.RandomAccessStream.copyAndCloseAsync(_stream, fileStream).done(function () {
var _imageUrl = URL.createObjectURL(file);
successCallback(_imageUrl);
}, function () { errorCallback("Resize picture error."); });
}, function () { errorCallback("Resize picture error."); });
}, function () { errorCallback("Resize picture error."); });