SwiftUI List performance

In our POI Finder app Where To? I'm using -canOpenUrl: to detect if compatible directions apps are installed. There are more than 50 supported apps, many of them available in a multitude of country-specific versions with respective country-specific URL schemes.In WWDC session 703 (Privacy and Your App) it was only mentioned that we can white list the needed URL schemes in LSApplicationQueriesSchemes in Info.plist. Also the mechanism for legacy apps built for iOS 8 was described. (The first 50 probed schemes are implicitly whitelisted.)What was missing is a statement about a maximum number of entries allowed in the LSApplicationQueriesSchemes array.We need more than 50 different URL schemes to test for all countries the app is deployed in.

Before installing watchOS 2 beta on Apple Watch, please read the watchOS beta Software Installation Guide.Troubleshooting InstallationDevices updated to watchOS beta may not be restored to earlier versions of watchOS without assistance from Apple Support. If your device restarts into recovery or your device needs to be restored back to the current GM version of watchOS, visit Apple Support and follow these steps:Click Apple Watch.Click Send in for Service. Click Setup & Usage. Click Updating my Apple Watch OS. Click Talk to Apple Support Now. Your device must be sent in for service to be restored and will be erased and restored with the current GM version of watchOS. Once your device is received, it may take up to 3 business days to be serviced. The device you receive back will be the device you sent in. 
 Apple Authorized Service Providers and Apple retail stores are unable to perform this service. Countries in which this service is currently available are: Australia, Canada, France, Germany, It

System Integrity ProtectionQuestion:Will disabling SIP be available as a choices .XML at install time for the 10.11 OS? If not, what mechanism will be provided for automatic disabling of SIP for use with automated imaging processes for machines?Pain point: Not every environment will be able to access Internet Recovery. At the same time, straight cloning of existing disks is problematic.Answer:SIP is always off in the Recovery environment and the Installer environment. While booted from those environments, you will be able to make changes to a boot disk which is otherwise protected by SIP.SIP-protected files will still appear as restricted when listed with ls's -O, but they can be renamed, moved, deleted or changed.There will be a command line tool to disable SIP in the Recovery environment, separate from the current GUI tool. The GUI tool is in fact going to disappear in favor of the command line tool. This change will likely appear in Developer Beta 2 or Beta 3; check the release notes.Question:The

We had an inquiry if we can build an app and a custom keyboard wherein the app has messaging capabilities and the custom keyboard has a view that can be toggled to display the same messages in the app version.Is there any guideline that would prevent this app to be approved if it is offering a non-keyboard related feature in a custom keyboard? The keyboard still has the normal keyboard capabilities, the messages viewer is just a mode of the keyboard.I also know that incorporating messaging capabilities in the keyboard is a heavy process, and that affects the Trust where the keyboard might get unreliable at times. But assuming that we come up with an efficient and minimal implementation of the message viewer in the keyboard that doesn't affect the performance that much, do you think this will get pass through app store review process?

After upgrading from OS X Yosemite to OS X El Capitan Developer Preview, I tried to edit /System/Library/LaunchDaemons/ssh.plist to change the default SSH port to a custom one. This is the process I've been using for a couple of years in previous Mac OS X versions.The problem is that El Capitan doesn't allow me to change anything in this folder (not even with sudo). The folder and its files are marked as restricted when I list the contents with ls -lO. The same folder listing in previous versions of OS X does not show restricted. I've recently to learned that this is due to SIP (System Integrity Protection) - https://forums.developer.apple.com/thread/4002 / https://forums.developer.apple.com/thread/4662.Question is, now with SIP, what's the politically correct way of changing the SSH port?

I'm relatively new to using Storyboards and very new to segue programming, and I'm encountering a problem with a custom segue that I'm trying to implement in my App; or more specifically, a problem when trying to use an unwind segue.I've created two custom segues which are extending UIStoryboardSegue, CurlSegue and CurlSegueUnwind. In my Storyboard I have two ViewControllers, each associated with a class that is extending UIViewController. I connected a Button in the first ViewController to the second ViewController using a Control+Drag, selecting custom and specifying the identifier of my segue (i.e. CurlSegue). This works fine and my custom segue performs as expected without incident, bringing up the second ViewController.To then get the reverse working -- following this documentation -- I added a method named prepareForUnwind to the first ViewController's associated class implementation with the signature below:- (IBAction)prepareForUnWind:(UIStoryboardSegue *)segueOn the second ViewController (in

I am building an application and would like users to see their list of Facebook friends so they can see who is already using my application and add them to their contacts and be able to invite their friends that aren't using the application yet. I know that by default I get access to users friends that are using my application. Is there a way to get access to the rest so that the user is able to invite them to use the app?

I tried to follow steps as per the talk and what's listed in the DemoBots app, though after presenting the RPPreviewViewController i only see a Black screen.Wanted to know if anyone else has got it to work, or its probably an SDK bug.

Hi,I am just starting to make an apple watch app/extension for an app that I already have on the iPhone. On the iPhone the app has a core data store that it uses to store data. Looking at Apple's documentation it seems that the right way to access this core data store on the watch would be to setup the data store in a shared app group container.To do this I would also need to perform the following steps :1. Migrate the existing data store from the current location into the shared container on app startup (at least the first time)2. Take care of cases where the core data store is encrypted (we encrypt the sqlite DB underneath) and also figure out if that will conflict with the migration in step 1.The steps above are possible to do although they are not trivial.I was wondering what issues would there be if I was to avoid this step altogether (using the shared container) and simply called openParentApplication:reply: everytime my watch app needed data ? My gut instinct tells me that this method would be

I have a simple app that I am developing. It stores one line to do list items in a core data model. I am completely new to core data. What I am trying to do is pass my managedObjectContext from my main viewcontroller to my second viewcontroller.This is the prepareforsegue that I have:-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([[segue identifier] isEqualToString:@EditItemSegue]) { NSIndexPath *indexPath = [self.tableView indexPathForCell:sender]; Item *item = [[self fetchedResultsController]objectAtIndexPath:indexPath]; EditItem *destination = (EditItem *)segue.destinationViewController; destination.managedObjectContext=self.managedObjectContext; destination.toDoItemName = item; } }Question 1: Is this correct?Question 2: On my second viewcontroller, how do I grab the moc? I now how it works if I am using SQLite but I think I am getting things confused.Alsodestination.toDoItemName = item;This line complains: incompatible pointer types assigning nsstring to itemI know what