I am working on a Photos extension for Mac OS X (10.11).
I have the Photos and PhotosUI frameworks imported.
Everything is ok apart from when I try to make a call to PHPhotoLibrary.sharedPhotoLibrary().
This results in an error in Xcode 7.3.1 (7D1014):
Use of unresolved identifier 'PHPhotoLibrary'
Has anyone else experienced this or know what could be causing the issue?
You don't need the PHPhotoLibrary class to make a photo editing extension in either iOS or OS X, and in OS X you can't use it.
The entire workflow for a photo editing extension goes through the PHContentEditingController protocol. On both platforms, the main view controller of a photo editing extension implements this protocol. It provides the asset to be edited in the startContentEditingWithInput:placeholderImage: method, and when the user is done editing it calls your finishContentEditingWithCompletionHandler: method so you can apply your final-quality edits and provide output.
Notice I say "when the user is done editing". Saving to the photo library isn't something you do in your extension code — instead Photos asks you for final rendered output, and Photos handles saving it to the library.
In your finishContentEditingWithCompletionHandler: method, you should:
Create a PHContentEditingOutput from the PHContentEditingInput (which you received in startContentEditingWithInput:placeholderImage:).
Save your output as a JPEG file (or QuickTime movie file, for video assets) to the renderedContentURL that the PHContentEditingOutput specifies
Call the completionHandler block that was passed to you, passing it your PHContentEditingOutput.
You calling that completion handler is what triggers Photos saving the edited asset to the library.
Related
I am looking for way to receive opened file's URL from Finder of macOS.
I implemented ZIP document type association into info.plist of an Mac-Catalyst app. So If user once associated ZIP file to my app for default app, user can double click ZIP file and launch my app.
But currently my app can't receive that opened file URL because I don't know which place/delegate function is good to receive that URL.
I believe I should implement that delegate function in SceneDelegate or AppDelegate, and I should also implement launch first viewcontroller with Storyboard manually.
This app window launching chain (that is from file double-click, to end of call viewcontroller) is very difficult for me.
Is there any help document or sample code?
Thank you.
I want to make "Open in.." function in my iOS application.
Is there any way to check if any app on this device is associated with file extension that i want to share?
If there are no apps on current device to open file with such an extension than UIDocumentInteractionController will not be displayed after clicking on "Open in.." button, but i want not to show this button in such case.
So the question is: how to check if any app on device can open some file with specific extension?
Update:
For example UIDocumentInteractionController has NSArray property icons.
It contains images of all aplications that can open the file with my extension. But if there are no applications it contans image of empty application.
So i can't check it using docInteractionController.icons.count == 0 for example. I am looking for other tricks.'
Thanks, in advance.
Although UIDocumentInteractionController does not offer a way to discover in advance whether there are any applications that can handle a document, -presentOpenInMenuFromRect: will return a flag indicating whether there were any applications that could open a document. This requires you to have already set up and presented the controller, which is not optimal.
There is a workaround for this, a little hacky but is functional: Before you invoke the "real" interaction controller, create a dummy one using a dummy document, and present it from the rect of the window's bounds. This guarantees that it will "appear" offscreen, so your user won't see it. At that point, you have the flag returned from -present, and you can immediately dismiss the dummy controller, and the proceed to show your UI appropriately.
On OSX, you can get a list of application bundle identifiers capable of handling a specific content type using LSCopyAllRoleHandlersForContentType. But on iOS, I don't think there is such a way.
If I find, I'll edit my answer.
Considering you are looking for other tricks, you can check if that one image in the icons array is the generic document icon.
If it is then you know that there is no app associated to handle that file type. But this approach will be OS version dependent as generic file icon may change.
From the official documentation:
To declare its support for file types, your app must include the
CFBundleDocumentTypes key in its Info.plistproperty list file. (See
“Core Foundation Keys”.) The system adds this information to a
registry that other apps can access through a document interaction
controller.
To me this indicates that the registry can only be accessed through UIDocumentInteractionController and so no, you would not be able to know in advance if there are any available apps for the file format (which would be totally in line with Apple's philosophy of not letting apps interact directly with each other).
UPDATE:
as you said the icons property contains an image even with no applications present. I checked and all the other methods and properties of the controller do not give an hint about the apps that may open the current file format.
You said in case that no app can open the specified file format there is an "image of empty application". Maybe you can extract that icon and when the array icons only has one image check if the extracted image and the icon are the same?
I am trying to create MAC application.
My input is --> Source Code Folder of an existing iPhone Application.
Using my application I want to insert an extra screen in the existing application. The extra screen will be always the first screen.
Since I want to Automate this, I have written a MAC application which browses through the Source code folder and replaces the first screen of app with my extra screen. This is working perfectly for Single View Application where I get the AppDelegate class name from the main.m file ( by parsing UIApplicationMain(argc,argv,MyAppDelegate,nil) ) line.
The application fails when the third argument is 'nil' in some of the applications (which may depend on the implementer or type of project).
Is it possible to make my application generic for all kind of applications?
Regards,
Nirav
Looks like you would only have to search (recursively) the folder for all .h files, and then detect the name of the class that implements UIApplicationDelegate. There should not usually have more than one, and would work with the defaults templates I guess.
i am making an app for iphone and for that i am using certain free libraries.My problem is that i want to show their complete license of nearly 4-5 pages in my application bundle so that a user can open settings in iphone and see that licensing page at one time but i am unable to do it.I have read these Specifiers for making an application bundle .
PSGroupSpecifier
PSTitleValueSpecifier
PSTextFieldSpecifier
PSSliderSpecifier
PSToggleSwitchSpecifier
PSMultiValueSpecifier
PSChildPaneSpecifier
but i want to show a page full of text like Settings->General->About->Leagl
just like in iphone through PSChildPaneSpecifier .Please help me how to do this>???
Thanks
You can create the same effect as used by Apple's iWorks apps for the license > section of the settings, without using any custom preference controller. Note this works for iOS 5 on the iPad, I have not tried it elsewhere. Use a PSChildPaneSpecifier for the initial control in the root plist. This points to the name of another plist file which will be the displayed child pane. You do not add .plist to the name within the root.plist file, it is implied. This plist file must be within the settings bundle. Next, use PSGroupSpecifiers in the child pane as the controls. For each paragraph use another PSGroupSpecifier - so the thing will scroll. Only use the Title section of the PSGroupSpecifier. The next gotcha that I found, was that by putting the strings in the plist file, the text was clipped in portrait orientation, so a placeholder string needs to go in the plist file and a StringTable used to point to a strings file. Text read from the strings file is properly kerned and displays without clipping.
The iPhone's "Legal" page is a custom preference controller which you can't use (not even with undocumented methods – you need to write a preference bundle in system locations which AppStore apps can't reach at all).
If you'd like to display the license, show it in the app.
I think you are going to need to use something like a UITextView, just make it non-editable. You can make in unobtrusive in your app but I think that is the only way to have 4-5 pages.
I don't think there is a nice way of displaying this in the preferences bundle. Personally I would either provide a series of url links or bring the preferences into the app itself. There is a good framework on github here that you may be able to modify.
I'm new here but I'd like to learn very well iPhone SDK...
I'm making an iPhone app where I'd like to show a modalView controller at launch of my app... How can I do this?
In this modalView, I request some informations and the view must appear only when these informations aren't saved!
Anyone can help me?
P.S.: Sorry for my bad English but I'm Italian... :D Thanks!
First, try to avoid to use NSUserDefautls as it's not application specific and can cause troubles under some circumstances (see reference docs).
I'd suggest to save your app specific data to some plist file for which you can check for at app startup -(void) applicationDidFinishLoading: method of your app delegate class - and decide if your modal view should be shown or not.
Let's say you have application wide accessible
NSMutableDictionary instance where you store your
preferences. When app is about to quit i.e. - (void)
applicationWillTerminate: method of your app delegate, simply store content of that dictionary to plist somewhere under you app directory structure (Documents folder is a good choice). See NSDictionary reference on how to store/read plist files. It's pretty simple.
Typically, you check for your saved data and if it's not there, you assume that it is the first run.
Thus, you first need to decide how you are going to persist data:
User defaults (NSUserDefaults).
Store a file. Typically a property list (plist) in the Documents directory.
Core Data.
I'd like to use NSUserDefaults...