SwiftUI List performance

Reposting this with more info:When the beta came out yesterday, I did an upgrade and not a restore. Today I litterally watched the battery percentage drop 1 percent every two minutes while I only had the home screen active (background apps disabled, location services disabled, etc). I kept checking the Settings -> Battery page and it show Home Screen at 15% of the usage, which was completely wrong.Today I did a complete restore and now things are better. The Settings -> Battery screen not only showed Photo App as the top user (I have over 8 gigs of phots and videos), but it also showed it as Background Activity. I didn't see that before I did the complete restore. Now, Mail, Messages and Calendar also show that. I'm sure the battery will still drain faster than with a production version, but at least it seems like the reporting is working correctly and it allowed me to understand what was sucking the life out of my battery.---------------------------------------------------------As an update, I have an

Two questions:1) Do you have FileVault enabled?2) What do you get when you run in a Terminal window diskutil CoreStorage list?

Can you try changing your Startup Disk in System Preferences? Make sure to give the pane a bit of time to read and recognize your volumes properly.I expect that this will work as a temporary fix. In terms of reaching a more permanent solution, I'm interested in seeing what diskutil list shows. Would you mind pasting or describing (if you know how to) the output that command yields? Note that it does include volume names and identifiers, which you can remove. I'm interested in your disk tree and what type of partition your 10.11 installation is.

I was experiencing the exact same thing when I upgraded. It kept telling me that there was not enough space available on the Apple Watch for the 3rd party apps. I then performed a hard reset: Crown and contacts button pressed together. After it restarted I was able to install the remaining 3rd party apps. Hope that helps. Giulio

Yeah I hear yaThe new features look great this year so cant wait for the docs BTW I already tried out the new 11 or so restrictions and they seem to be working well so far as does the ChangeManagementState = 'Managed' feature to change user installed apps to managed apps without the need to reinstall themIt works really well so far. Although they seem to have broken installing apps from the store in the InstallApplication command. Same thing with Managed Distribution apps.Uploaded Enterprise apps still install just fine, but with store apps it gets queued to install but then if you pull managed application list from the device after you see the app goes into ManagedButUninstalled status

Rich listed in some notes elsewhere that you can see what files are restricted in /System/Library/Sandbox/rootless.conf. The asterisk denotes items that are excluded from SIP.Also using the -O (cap o) with the 'ls' command shows if a file is restricted.

When you mention the line below, do you mean the following.You should define a property or method on the destination VC that says here is the data to be displayed.When the delegate call back method is called, I am currently writing the line of code below.self.feedViewController!.feedsTableView.reloadData()Since this is reloading a tableView in another VC you mentioned this was not ideal. Instead, would the following logic make more sense.In the home VC I would instead write.self.feedViewController!.updateTableView()Then in the FeedVC where the tableView resides I would perform the following in the updateTableView() method.func updateTableView() { self.feedsTableView!.reloadData() }I hope this is clear. Take care,Jon

Also.... I found a very informative website that has a ton of examples specifically on how to work with dates within Swift.Here's a code snippet that he uses as an example, but does not compile for me, and I have no idea why I get the error: could not find member 'CalendarUnitDay'. Was this syntax changed with Swift 2.0?Every example I could find uses this syntax, but for me... no luck.// Playground - noun: a place where people can play import UIKit let userCalendar = NSCalendar.currentCalendar() // Let's create some dates to work with // ==================================== // It's 3:45:30 a.m., New Year's Day. Time to go home. let goHomeYoureDrunkTimeComponents = NSDateComponents() goHomeYoureDrunkTimeComponents.year = 2015 goHomeYoureDrunkTimeComponents.month = 1 goHomeYoureDrunkTimeComponents.day = 1 goHomeYoureDrunkTimeComponents.hour = 3 goHomeYoureDrunkTimeComponents.minute = 45 goHomeYoureDrunkTimeComponents.second = 30 let goHomeYoureDrunkTime = userCalendar.dateFromComponents(goHomeYoureDrunkTimeCom