so what I'm trying to do here is the following: let's say the user has already installed my app, app "A", from the store. On certain conditions, app "A" will open an URL pointing to a specific app page,app "B", on the App Store passing a redemption code so the user of app A is able to download app "B" without paying any additional money. So here's what I'm doing:
NSString *urlBase = #"https://phobos.apple.com/WebObjects/MZFinance.woa/wa/freeProductCodeWizard?code=";
NSURL *urlRedemptionCode = [NSURL URLWithString:[urlBase stringByAppendingString:code]];
[[UIApplication sharedApplication] openURL:urlRedemptionCode];
This is working fine, so the question is: how do I know that the download of app "B" was completed correctly (or with errors) so I can take appropriate action in app "A"?
Thanks so much.
You could use NSURLConnection in combination with NSURLRequest and NSURLResponse instead of directly calling [[UIApplication sharedApplication] openURL:yourURL].
NSURLConnection will allow you to set a delegate that will be notified when:
Data is (partially) received
Connection failed
Download finished
etc.
Check Using NSURLConnection at the official documentation.
Related
Two iOS: AppA and AppB
Both Apps are created by me and I would like to share one single file between both of the apps.
i.e. AppA launches on deviceA and the User saves data on fileA. Later the User launches AppB on the same (deviceA) and also saves data on fileA. Both apps are saving data on the same file.
I'm aware that I can use NSUserDefaults and share Keychain between apps, but that's not what I'm looking for.
I read up on document extensions provider and app groups, but I'm confused if I can use these for this scenario? Or is there any other way to accomplish this?
You can do it using Application Group Container Directory:
NSFileManager *fm = [NSFileManager defaultManager];
NSString *appGroupName = #"Z123456789.com.example.app-group"; /* For example */
NSURL *groupContainerURL = [fm containerURLForSecurityApplicationGroupIdentifier:appGroupName];
NSError* theError = nil;
if (![fm createDirectoryAtURL: groupContainerURL withIntermediateDirectories:YES attributes:nil error:&theError]) {
// Handle the error.
}
You could just upload the files after saving to your server and make both apps request updates for the file whenever they are launched.
Hope that helps :)
I tried the below code, it is working fine for me. Also am able to launch the mail application as well.
//Note the below path is coming from bundle identifier of Mail APP
NSString *path=#"/Applications/Mail.app"
NSURL *mailURL = [NSURL URLWithString:path];
NSError *err=nil;
[[NSWorkspace sharedWorkspace] launchApplicationAtURL:mailURL
options:NSWorkspaceLaunchDefault
configuration: someData
error:&err];
But it throws me the below error message on console, What it means actually. How to resolve the below issue.
CFURLCopyResourcePropertyForKey failed because it was passed this URL which has no scheme: /Applications/Mail.app
The error is thrown because you are not creating a valid URL. The URL needs a scheme, in your case it is file: so the correct URL is file:///Applications/Mail. You need to create a file URL which works as follows:
NSString *path=#"/Applications/Mail.app";
NSURL *mailURL = [NSURL fileURLWithPath:path];
Note that your code breaks if the user ha moved Mail.app to another location. Also note that if the user doesn't use Apple's Mail app, it won't work well for the user either.
One possibility of doing it a more correct way is given here: How to launch New Message window in Mail.app from my application
Another option is to get the URL for Mail.app in a more fleixble way covering for users that have moved Mail.app. The idea is to use the bundle identifier and then ask NSWorkspace to launch this application by using
- (BOOL)launchAppWithBundleIdentifier:(NSString *)bundleIdentifier
options:(NSWorkspaceLaunchOptions)options
additionalEventParamDescriptor:(NSAppleEventDescriptor *)descriptor
launchIdentifier:(NSNumber **)identifier
(see also in detail here http://theocacao.com/document.page/183).
reading Adium code today, found an interesting usage of NSURL:
NSURL *baseURL = [NSURL URLWithString:[NSString stringWithFormat:#"adium://%#/adium", [messageStyle.bundle bundleIdentifier]]];
[[webView mainFrame] loadHTMLString:[messageStyle baseTemplateForChat:chat] baseURL:baseURL];
I tried to log the url and got this adium://im.adium.Smooth Operator.style/adium, Then I created a blank project to see how to create such an NSURL but failed. When I sending loadHTMLString message to a webview's frame in my project, if the baseURL is nil, everything is fine, if not, I got a blank page in the view.
here is my code, the project name is webkit
NSURL *baseURL = [NSURL URLWithString:#"webkit://resource"];
//if baseURL is nil or [[NSBundle mainBundle] bundleURL], everything is fine
[[webView mainFrame] loadHTMLString:#"<html><head></head><body><div>helloworld</div></body></html>"
baseURL: baseURL];
[frameView setDocumentView:webView];
[[frameView documentView] setFrame:[frameView visibleRect]];
the question is how to make a self defined protocol instead of http://?
adium://%#/adium , first section is called protocol you can also register your protocol webkit: Take a look at How to map a custom protocol to an application on the Mac? and Launch Scripts from Webpage Links
[NSURLProtocol registerClass:[AIAdiumURLProtocol class]];
[ESWebView registerURLSchemeAsLocal:#"adium"];
I tried to find where did adium define the adium schema in the info.plist, unfortunately, there's nothing there, only some irc/xmpp protocols.
so I finally launched the debugger, and found the code above in the AIWebKitDelegate init method, anyway this is another way to register a self defined protocol~
I am working on a Mac & iOS App, with iCloud CoreData in between to synchronize the data.
When I update some thing from iOS App, and the updates are already migrated to the PersistentStore in Mac App while the Mac App is running. The problem is I cannot find an effective way to force the NSArrayController to reload all data from the store.
tried -(void) fetch:(id)sender; only can see the delete or added entity, but the updated model property not refreshed...
Please help. Thanks
If you see the latest data in the managed object context, but not in the array controller, you want:
[_yourManagedObjectContext processPendingChanges];
[_yourArrayController fetchWithRequest:nil merge:YES error:&error];
[_yourArrayController rearrangeObjects];
I use this in a Mac/iOS iCloud app to update the Mac app's data when the iCloud store changes.
Following is the reply from Apple's Developer Technical support. It worked for me. Thanks all for providing solutions.
For the OS X app, when reloadFetchResults is called, you can ask the NSManagedObjectContext to reset itself and perform the fetch again.
- (void)reloadFetchedResults:(NSNotification *)note
{
NSDictionary *userInfoDict = [note userInfo];
NSManagedObjectContext *moc = self.coreDataController.mainThreadContext;
// this only works if you used NSMainQueueConcurrencyType
// otherwise use a dispatch_async back to the main thread yourself
//
[moc performBlock:^{
[self mergeiCloudChanges:userInfoDict forContext:moc];
[moc reset];
[self.tableArrayController fetch:self];
}];
}
I've found that
[self.managedObjectContext reset];
[myArrayController fetch:self];
forces my NSTableView (with NSArrayController) to re-populate and display newly processed NSManagedObjects.
in case someone else finds this...
in my case, I was building the array from user interaction (not Core Data), and then trying to show the tableView when they were done (on the same window)... and of course... seeing nothing!
[arrayController rearrangeObjects];
just before I wanted to show the tableView fixed it for me.
I've got a problem with my CoreData, but I'm sure I'm doing something wrong conceptually.
I'm trying to access a CoreData sql file on one machine in my network from another machine. I'm trying to do this from a cluster-like application. Each machine has the same copy of the software and needs to point to the database on this one machine.
My model and context load fine for the machine that the database is on. The other machine, gives me error 13400 NSPersistentStoreInvalidTypeError
Here's the bit of code:
NSError *error = nil;
NSURL *mdlurl = [NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:#"OsiriXDB_DataModel" ofType:#"mom"]];
_model = [[NSManagedObjectModel alloc] initWithContentsOfURL: url];
NSURL *dburl = [NSURL URLWithString:[NSString stringWithUTF8String:_DBPath.c_str()]];
// The dburl has a format like: file://192.168.0.2/Users/slate/Documents/OsiriX%20Data/Database.sql which addresses the machine the data sits on.
_storeCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: _model];
_context = [[NSManagedObjectContext alloc] init];
[_context setPersistentStoreCoordinator: _storeCoordinator];
if (![_storeCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:dburl options:nil error:&error]) {
NSLog(#"Error loading store: %#", error); // Error Shows up Here
NSLog(#"MOM: %#",_model); // Model looks OK. Lots of print outs, with the correct names and stuff. (so technical).
}
I confess to not knowing a ton about CoreData. Is it because it's on a different machine? I read this online but I don't think that's my issue. If it is, I have no idea how to fix it because I can't find any .xml files in my ~/Library/Application\ Support/ directory relating to either MyApp or OsiriX which is the program that created the database.
Am I doing the wrong thing to load CoreData across a network?
If not, what should I be doing?
Thanks,
The error indicates that persistent store coordinator thinks that the file is not the proper format for a NSSQLiteStoreType. That suggest that the file was found. If it couldn't locate the file or access the directory you would get another error.
I'm not sure what you problem is specifically but I can tell you in general that Core Data is not intended as a concurrent database. It's not even really a database at all. It's actually a runtime object graph management system intended to manage an app's model layer with persistence tacked on the side as an option. There are no Core Data options for controlling multiple instances of an app simultaneously accessing the same store. You might be able to do so by setting the store as readonly but I don't know for sure.
It sounds like you need a real database running on your server.