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https://issues.apache.org/jira/browse/CB-6484?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13977714#comment-13977714
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Kent Spadzinski commented on CB-6484:
-------------------------------------
Implemented a custom plugin utilizing the UIImagePickerController and the issue
still exists. Did some research and it appears this is a very common problem
with iOS7, UIImagePickerController and any background tasks. There isn't any
background task running when navigator.camera.getPicture is being called but
maybe there is something cordova related happening that is blocking things.
> navigator.camera.getPicture FILE_URI 20 second delay on second call
> -------------------------------------------------------------------
>
> Key: CB-6484
> URL: https://issues.apache.org/jira/browse/CB-6484
> Project: Apache Cordova
> Issue Type: Bug
> Components: CLI, iOS, Plugin Camera
> Affects Versions: 3.4.0
> Environment: iOS 7.1 (iPhone 5 and iPhone 5s)
> Reporter: Kent Spadzinski
> Fix For: 3.4.0
>
>
> First time the camera is used it works fine. However, if the user cancels or
> tries to take another picture the camera screen is black. At this point it
> can take between 10-15 seconds before the camera preview appears and another
> picture can be taken. Have tried all version of the camera plugin starting
> at 0.2.5 (up to 0.2.9). Here is the code and device logs:
> Here is the function... there are no errors logged in console when called:
> {code}
> app.takePhoto = function() {
> navigator.camera.getPicture(app.capturePhoto, app.onFail, {
> quality : 20,
> destinationType : 1,
> sourceType : 1,
> encodingType: Camera.EncodingType.JPEG,
> targetWidth: 1024
> });
> }
> var retries = 0;
> app.capturePhoto = function(fileURI ) {
> var win = function (r) {
> app.clearCache();
> retries = 0;
> $("#progressview").hide();
> app.showAlert("Your photo was successfully uploaded", "Photo
> Upload");
> var listview = $("#lsPhotos").data("kendoMobileListView");
> listview.setDataSource(app.photoDataSource);
> app.photoDataSource.read();
> }
> var fail = function (error) {
> if (retries == 0) {
> retries ++
> setTimeout(function() {
> app.capturePhoto(fileURI)
> }, 1000)
> } else {
> retries = 0;
> app.clearCache();
> $("#progressview").hide();
> app.showAlert("The photo could not be uploaded to the server.
> Please try again", "Photo Upload");
> }
> }
> $("#progressview").show();
> var fileUrl = "xxxxxxxxxxxx";
> var options = new FileUploadOptions();
> var prev_perc;
> options.fileKey = "file";
> options.fileName = mediaFiles[i].fullPath; //
> fileURI.substr(fileURI.lastIndexOf('/') + 1);
> options.mimeType = "image/jpeg";
> options.params = {}; // if we need to send parameters to the server
> request
> var ft = new FileTransfer();
> ft.onprogress = function(progressEvent) {
> if (progressEvent.lengthComputable) {
> var perc = Math.floor(progressEvent.loaded /
> progressEvent.total * 100);
> if(perc > prev_perc) {
> $("#progressview").text(options.fileName + ": " + perc +
> "% Uploaded");
> }
> prev_perc = perc;
> }
> else {
> $("#progressview").text("Uploading Photo");
> }
> };
> ft.upload(fileURI, encodeURI(fileUrl), win, fail, options);
> }
> {code}
> Click "Take Photo" button:
> pr 15 11:14:13 Kentos-iPhone-5s kernel[0] <Debug>:
> AppleH6CamIn::setPowerStateGated: 1
> Apr 15 11:14:13 Kentos-iPhone-5s kernel[0] <Debug>:
> AppleH6CamIn::power_on_hardware
> Apr 15 11:14:13 Kentos-iPhone-5s kernel[0] <Debug>:
> AppleH6CamIn::ISP_SelectBestMIPIFrequencyIndex_gated - channel: 0, index: 2
> Click "Cancel" on the camera view:
> Apr 15 11:14:17 Kentos-iPhone-5s kernel[0] <Debug>:
> AppleH6CamIn::setPowerStateGated: 0
> Apr 15 11:14:17 Kentos-iPhone-5s kernel[0] <Debug>:
> AppleH6CamIn::power_off_hardware
> Immediately Click "Take Photo" again and the camera view appears with black
> screen
> Camera now shows preview and can take a picture (20 seconds elapsed):
> Apr 15 11:14:37 Kentos-iPhone-5s kernel[0] <Debug>:
> AppleH6CamIn::setPowerStateGated: 1
> Apr 15 11:14:37 Kentos-iPhone-5s kernel[0] <Debug>:
> AppleH6CamIn::power_on_hardware
> Apr 15 11:14:38 Kentos-iPhone-5s kernel[0] <Debug>:
> AppleH6CamIn::ISP_SelectBestMIPIFrequencyIndex_gated - channel: 0, index: 2
> This happens in iOS 7.1 on both iPhone 5S and original iPhone 5 (enterprise
> user base).
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