I'm using the following code snippet in a Mac Catalyst app to "export" (copy) a file from an URL to a user-selected URL:
UIDocumentPickerViewController* documentPicker = [[UIDocumentPickerViewController alloc] initForExportingURLs:#[ [[NSURL alloc] initFileURLWithPath:path] ] asCopy:YES];
This works as expected if a local folder is picked (the file in path is copied there). However, if a network folder is picked (in this case, SMB), a zero-length file is generated and no error is shown.
Does anyone know what might cause this?
Related
I'm looking for cocoa framework that acquires the following information for each application : vendor name, version and full application name.
Alternatively, I could use a file that contain this information ... I've tried to search it in /Application/(name).app/... but I couldn't find it in specific location that is the same for all applications.
It should be in the info.plist under CFBundleName
If you go into <application>/contents/info.plist you'll find it there
from the documentation:
CFBundleName (String - iOS, OS X) identifies the short name of the
bundle. This name should be less than 16 characters long and be
suitable for displaying in the menu bar and the app’s Info window. You
can include this key in the InfoPlist.strings file of an appropriate
.lproj subdirectory to provide localized values for it. If you
localize this key, you should also include the key
CFBundleDisplayName.
here's an example code for acquiring version from Info.plist of a selected application:
string GetAppVersion(string app)
{
NSString *vlcFilePath = [NSString stringWithCString:app.c_str()];
NSDictionary* infoDict = [[NSBundle bundleWithPath:vlcFilePath] infoDictionary];
NSString* version = [infoDict objectForKey:#"CFBundleVersion"];
}
...
...
GetAppVersion("/Applications/Notes.app").c_str());
in my app, I want to load certain image user picks, make some modification, after that, save a copy in my own file format. Since I want to keep track of user modification, I decided to export my file as a package(bundle).
So, in my document class, there's a NSImage object that holds the image file. In the fileWrapperOfType:error: method, I've setup a NSFileWrapper object, and put the object in it. Here's the code:
NSDictionary *fileWrappers = [self.documentFileWrapper fileWrappers];
if (image != nil) {
NSBitmapImageRep *imageRep = [image bitmapImageRepresentation];
NSData *imageData = [imageRep representationUsingType:NSPNGFileType properties:nil];
NSFileWrapper *imageFileWrapper = [[NSFileWrapper alloc]
initRegularFileWithContents:imageData];
[imageFileWrapper setPreferredFilename:#"image"];
[[self documentFileWrapper] addFileWrapper:imageFileWrapper];
}
return self.documentFileWrapper;
In my project plist file, I have two document types, first is the type of public.image since I need to load images in my app:
The other one is my own document type. To make the file a package, I've checked the bundle checkbox in xcode:
If I simply run this now, the code compains that finding extension from type identifier is deprecated, so, I managed to add an entry in Exported UTIs:
At this moment, everything seems working, except that the outputed folder with mdc extension, is indeed a folder instead of a package, what am I missing here? Thanks in advance!
Finally I solved the problem, the key here is to change Conforms To field to com.apple.package.
In order for a package on OS X to be a pkg, it must have a .pkg extension. I hope it is as simple as having the wrong extension.
Note: Until recently, .pkg files were merely directories. Now, we often see package.pkg packages that are obscured cannot be browsed causually without some tricks like using Pacifist, pkgutil or xar:
pkgutil --extract file.pkg folder/
or
xar -xf file.pkg
I am attempting to upload a local folder full of documents to a remote iCloud folder. I wrote this method to loop through the array of files in the local folder, check if they already exist, and if they don't exist upload them to iCloud. Note- this code is being executed on the background thread not the main thread.
//Get the array of files in the local documents directory
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *localDocuments = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:nil];
//Compare the arrays then upload documents not already existent in iCloud
for (int item = 0; item < [localDocuments count]; item++) {
//If the file does not exist in iCloud, upload it
if (![[iCloud previousQueryResults] containsObject:[localDocuments objectAtIndex:item]]) {
NSLog(#"Uploading %# to iCloud...", [localDocuments objectAtIndex:item]);
//Move the file to iCloud
NSURL *destinationURL = [[[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil] URLByAppendingPathComponent:[NSString stringWithFormat:#"Documents/%#",[localDocuments objectAtIndex:item]]];
NSError *error;
NSURL *directoryURL = [[NSURL alloc] initWithString:[documentsDirectory stringByAppendingPathComponent:[localDocuments objectAtIndex:item]]];
BOOL success = [[NSFileManager defaultManager] setUbiquitous:YES itemAtURL:directoryURL destinationURL:destinationURL error:&error];
if (success == NO) {
//Determine Error
NSLog(#"%#",error);
}
} else {
...
} }
When I run this code the For Loop works fine - I use NSLog statements to find out which file it is uploading - and every file stored locally that isn't already in iCloud is supposed to start uploading. After the For Loop is finished I check which documents are now in iCloud using developer.icloud.com. Only one file (an sqlite file that my app keeps making but never uses) out of the many stored locally uploads to iCloud. Why would only one file upload when using for loops?
When I use the same code to upload individual files (without a For Loop) they upload to iCloud perfectly. Why would a For Loop hinder the uploading of files? Does this have to do with the For Loop continuing to the next line of code without waiting for the last process / line to finish executing? What's going on here?
EDIT: Usually when I upload large files to iCloud (without using a For Loop) I can see on the iCloud dev site that the file is Pending Upload almost instantly. I'm testing everything over WiFi and I've been waiting a while but nothing appears (except for the sqlite file).
EDIT: I also check for iCloud availability in a different method which then allows calls to this method if iCloud is available. I've also made sure to read over the documentation and watched the WWDC videos on Apple's website, however they are complex and don't provide much explanation for what I'm trying to do.
EDIT: After revising the code above (adding the error functionality), I now get this error message in the log:
Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t be completed. (Cocoa error 512.)" UserInfo=0x1f5dd070 {NSUnderlyingError=0x208ad9b0 "The operation couldn’t be completed. (LibrarianErrorDomain error 2 - No source URL specified.)"}
This makes things even more confusing because one of the files uploads successfully, whereas the others do not.
OK, that last edit is useful. The error complains that the source URL (directoryURL in your code) is missing-- probably because it's nil. Why would it be nil? Because you're creating it wrong. You're using -[NSURL initWithString:], and the docs say that:
This string must conform to URL format as described in RFC 2396. This method parses URLString according to RFCs 1738 and 1808.
You're passing in a file path, not a URL. If you pass NSURL something it doesn't recognize as a valid URL, it normally returns nil. It looks like NSURL will frequently produce a file URL anyway, but failure is the expected behavior here. From what I can tell it seems to work if the filename contains no spaces, but that's not documented and not something you could rely on.
What you should do is change the line where you initialize directoryURL to use something that accepts a file path. Something like:
NSURL *directoryURL = [NSURL fileURLWithPath:[documentsDirectory stringByAppendingPathComponent:[localDocuments objectAtIndex:item]]];
Also, make sure to verify that directoryURL is not nil, just in case.
When I download a URL like this one: http://tinyurl.com/csr2xc7 then ASIHTTPRequest's temporaryFile is created and the data is not stored in memory. However with a URL like this: http://www.youtube-mp3.org/get?video_id=2MDYBFKjx2I&h=03492626150e7377f6def57cd3bdc16d the temporary file is not created.
The difference is that the second URL immediately starts a download when you open it, whereas the first URL only displays a video that can be downloaded using a request. Also when you open the second url you are first redirected before the download starts.
How can I get this working?
I was able to solve it myself. When the original request is redirected the temporary file gets deleted too. So in the request:willRedirectToURL: you simply have to set the path again, and now its working like a charm :)
- (void)request:(ASIHTTPRequest *)orig willRedirectToURL:(NSURL *)newURL {
NSArray *ar = [NSArray arrayWithContentsOfFile:#"/var/mobile/Library..."];
[request setDownloadDestinationPath:[[ar objectAtIndex:orig.tag] valueForKey:#"Path"]];
[request setTemporaryFileDownloadPath:[[ar objectAtIndex:orig.tag] valueForKey:#"tmp"]];
[request redirectToURL:newURL];
}
I have finished the majority of my application that I am working on, but I have run into a problem. Basically, what I wrote streams audio from my server to the iPod and plays it without having to save the file. It has a GUI that allows the user to choose the file they want to listen to, and it works flawlessly.
My problem is that I want to be able to have some sort of a counter that updates every time a user listens to a file. I have a file in the project, "TotalDownloads.txt," that I had planned on using to store the new value and upload back to the server, but when the code executes, nothing changes within that file. I had also tried just declaring the file #"TotalDownloads.txt," but that created a new file in the Macintosh HD named "TotalDownloads.txt."
The two identifiers "//-" and "-//" are to parse the file for the number, when I get this figured out, specifically to isolate the numeric value, should there be any formatting involved. Eventually, I want to have counts for each and every one of the files.
I have no problem with downloading the text file off of the server and reading it into the iPhone, but the problem arises when sending it back. What is the easiest way to 1, make a temporary file text file on the iPhone, and 2, upload it back to the server to replace the existing file?
Is there a way to just modify the file on the server?
Any help is appreciated.
Below is what I have so far:
- (IBAction)action
{
NSURL *textURL = [NSURL URLWithString:#"http://www.faithlifefellowship.us/Audio/TotalDownloads.txt"];
NSString *textFromFile = [NSString stringWithContentsOfURL:textURL encoding:NSUTF8StringEncoding error:false];
int click = [textFromFile intValue];
click += 1;
NSString *replace = #"//-";
NSString *clicks = [NSString stringWithFormat:#"%d",click];
replace = [replace stringByAppendingString:clicks];
replace = [replace stringByAppendingString:#"-//"];
//test is a label I used to check to make sure the download count was being read properly.
test.text = clicks;
[replace writeToFile:[[NSBundle mainBundle] pathForResource:#"TotalDownloads" ofType:#"txt"]atomically:YES encoding:NSUTF8StringEncoding error:NULL];
}
Here is the best way I suggest you do this.
Set up a page on your server that accepts a get request.
Code the page to take the value from that get request (which should be the name of the file you are trying to update) and update the file at that path.
From your app, use UIWebView this way:
UIWebView* web = [UIWebView new];
[web loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.mydomain.com/myPage.php"]]];
web = nil;
Presto!