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Black Launch Screen on iPad 2 - Tried Everything
Started by RayCardillo Jan 14 2019 07:57 AM

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#1

RayCardillo

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RayCardillo
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  • 26 posts
  • Corona SDK

I followed the new guidelines very carefully, been through it several times at this point to make sure I was doing everything correctly, but just cannot figure our what's going on. I'll provide the info here, but the main question I'm curious about is whether the "new" technique is compatible with the "old" technique as far as the Corona build settings are concerned. In other words, will the new icon assets and Launch Screen technique work on a device running iOS 8, 9, and 10, (not just 11 and 12). I assumed so, but everything I've tried, and I still get a black launch screen on this iPad 2 (running iOS 9.3.5). On my iPhone X, I cannot really tell, because it loads too quickly.
 
One difference is that I'm on Xcode 10 and the LaunchScreen template provided by Corona had some build errors, so I just created my own shell project by looking at the template project carefully. Could something have changed with the way the storyboard package is exported?
 
Another difference is that this particular app only allows landscape mode and uses oversized images (even for the launch screen) and expects an aspect fill (uses "letterBox" mode in Corona SDK). I configured the storyboard as such and it looks great in Xcode. I know the app isn't used, but the app builds fine and displays the launch screen as expected. Then I exported as a package (.storyboardc), and I copied that file and the images to the root folder of my project (both alongside main.lua). Still get a black screen when loading.
 
So at this point, I'm wondering if it's an Xcode 10 difference or maybe an iOS version difference and maybe I have to provide static images also for the older releases? I've even tried the many things people said to do when Springboard seems to cache the LaunchScreen image, and I bumped the version just to see if that makes a difference. No matter what I try, this older device just always shows a black screen when opening. It's a slower device, so it's great to test the LaunchScreen (all apps have a slight delay when loading - but they all show a proper launch screen so it's not as annoying).
 
That said... see attached and read below to see some of the relevant config details.
 
----------
 
Corona SDK Daily Build = 3459 (2019.01.10)
 
build.settings (snippets)

  orientation =
  {
    default = "landscapeRight",
    supported =
    {
      "landscapeLeft", "landscapeRight"
    },
  },
  -- -- --
  iphone =
  {
    xcassets = "Images.xcassets",
    plist =
    {
      MinimumOSVersion = "8.0", -- needed for Appodeal
      NSAppTransportSecurity = { NSAllowsArbitraryLoads=true }, -- needed for Appodeal
      UIStatusBarHidden = true,
      UIApplicationExitsOnSuspend = true, -- quit app on suspend
      UILaunchStoryboardName = "LaunchScreen",  -- Required!
    },
  },
  -- -- --
  excludeFiles =
  {
    all = { "release.txt", "*.bak" },
    android = { "assets/audio-m4a/", "Launch*.*", "Images.xcassets" },
    ios = { "assets/audio-ogg/", "Icon-*dpi.png" },
  },

project structure

[~/project]$ ls *.settings main.lua config.lua L*.* I*.*
Icon-hdpi.png		Icon-xhdpi.png		Launch.png		build.settings
Icon-ldpi.png		Icon-xxhdpi.png		Launch@2x.png		config.lua
Icon-mdpi.png		Icon-xxxhdpi.png	Launch@3x.png		main.lua

Images.xcassets:
AppIcon.appiconset	Contents.json

LaunchScreen.storyboardc:
01J-lp-oVM-view-GlT-jt-GVr.nib	UIViewController-01J-lp-oVM.nib
Info.plist			designable.storyboard

image resolutions (non-standard)

General
Complete name                            : Launch.png
Format                                   : PNG
Format/Info                              : Portable Network Graphic
File size                                : 1.29 MiB

Image
Format                                   : PNG
Format/Info                              : Portable Network Graphic
Format_Compression                       : LZ77
Width                                    : 1 386 pixels
Height                                   : 720 pixels
Bit depth                                : 24 bits
Compression mode                         : Lossless
Stream size                              : 1.29 MiB (100%)

General
Complete name                            : Launch@2x.png
Format                                   : PNG
Format/Info                              : Portable Network Graphic
File size                                : 2.93 MiB

Image
Format                                   : PNG
Format/Info                              : Portable Network Graphic
Format_Compression                       : LZ77
Width                                    : 2 079 pixels
Height                                   : 1 080 pixels
Bit depth                                : 32 bits
Compression mode                         : Lossless
Stream size                              : 2.93 MiB (100%)

General
Complete name                            : Launch@3x.png
Format                                   : PNG
Format/Info                              : Portable Network Graphic
File size                                : 4.55 MiB

Image
Format                                   : PNG
Format/Info                              : Portable Network Graphic
Format_Compression                       : LZ77
Width                                    : 2 772 pixels
Height                                   : 1 440 pixels
Bit depth                                : 24 bits
Compression mode                         : Lossless
Stream size                              : 4.55 MiB (100%)


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#2

RayCardillo

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RayCardillo
  • Observer

  • 26 posts
  • Corona SDK

Alright, I'm going 2 for 2 spamming the forum with things that I ended up solving myself, but in case it helps anyone else... I was able to deduce that my storyboard was actually fine and getting used because I changed the default background color and could see that being used during launch. So I reviewed a little more carefully, expecting that maybe there was another difference I overlooked, and I found a couple things. First, I made sure the deployment target for the project was 9.0 just in case that mattered. Next, I made sure the asset catalog image name was "Launch" as in the sample template provided. I originally named it "LaunchScreen" even though the actual PNG names were "Launch" - tested as the project and then compiled the package and rebuild... and now I'm seeing the launch screen as expected.

 

So somewhere between those to things made the difference, but by bet is on the latter.



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#3

Rob Miracle

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Rob Miracle
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  • 26,072 posts
  • Enterprise

It's very likely the later. In Xcode, when you create the Storyboard file, you have 3 image slots (1x, 2x, 3x). You can drag in the names "Fred.png", "Barney.png" and "Wilma.png" if you want to. That asset catalog has a name that's used to put a UIImage on the storyboard. Then finally you give the whole project a name. These all can be different. But only if you're building your own setup.

 

We tried to make it easy with the version that can be downloaded from GitHub by trying to keep things consistent. If you use that .storyboard file, we have used Launch.png Launch@2x.png and Launch@3x.png as those names, so you can use that downloaded .storyboardc file without having to use Xcode as long as your names match. We encourage you to use LaunchScreen.storyboardc as the name, since people like to copy/paste code from our documents and that's our example. But you can use any name for that storyboardc file that you like as long as you match build.settings to it.

 

Rob




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