问题
Installed the app on iPhone 6 iOS9 and here is what happened. Notice black bars on top and bottom. It works just fine on iOS8. How I can fix it?
I\'ve tried building with Xcode 6.4 & 7. Same result.
(iPhone 5 used to run iPhone 4 apps like this)
回答1:
Did you migrate your app from an earlier version of Xcode? If so then Xcode is now making an assumption about your screen size and you need a way of indicating the actual screen size at run time.
There are two ways:
a) If you use a launch screen.
You are missing a LaunchScreen.storyboard file. Create a LaunchScreen.storyboard file and add it to your project.
b) If you don't use a launch screen.
Go to your Target's settings and choose General, then App Icons and Launch Images. Now set "Launch Screen File" to your "main.storyboard" (or another storyboard if appropriate)
回答2:
My App does not use a launch image. Setting the "Launch Screen File" to my "main.storyboard" file fixed the issue for me.
This setting can be found under "Target->General->App Icons and Launch Images"
Use the following link for more information: http://oleb.net/blog/2014/08/replacing-launch-images-with-storyboards/
回答3:
For me the problem is i'm migrating my app from earlier version of Xcode and the project is missing LaunchScreen.storyboard file. I have just created LaunchScreen.storyboard and added it to launch Screen File. This did the trick.
回答4:
I'm using xcode 7.2 . At first, I created a LaunchScreen.storyboard file, as Potassium Permanganate suggested, and it worked! However, I didn't want a launch screen, so I tried setting Main.storyboard as Launch Screen File and it did the trick!
回答5:
When you migrate your app from earlier version of xCode to xCode 6 or xCode 7, you will face this issue.
For iOS 7 and earlier, developers need to provide separate launch images for all screen sizes, resolutions and orientations their app supported.
In Xcode 6 or later, there is another option. You can specify a storyboard whose initial view controller will then be used as the app’s launch screen. Use below steps:
Create a blank storyboard file named LaunchScreen.storyboard.
Go to your target settings and, on the "General" tab, select the storyboard as your Launch Screen File in "App Icons and Launch Images" section. Xcode will add a corresponding UILaunchStoryboardName key to your app’s Info.plist. When this key is present, Xcode will prioritize it over any launch images you might have set.
- Add some subviews to newly created storyboard's view and position them with constraints. When you launch the app on a device, the OS should use the scene as the launch screen.
Delete the older app from simulator and clean the project.
Cheers :-)
回答6:
I have same issue in my app . In my app i have multiple targets added to project . If i use launch storyboard solution then i can see full screen but in my case my Lunch image looks blurred and stretched on iPhone 4 . To come out from this issue I have used LaunchImage asset solutions . After this still I am facing same issue .I have tried all above solutions, At end I found my png images don't include ALPHA resolutions . After adding new images ,i can see full screen images .
回答7:
Go to the asset catalog and create a new iOS launch Image. then in Target>General>App Icons and Launch Images>Launch Image Source you will see automatically the new Launch Image created in the assets catalog.
回答8:
In my case, I have several targets in the project and each one has it's own launch screen images. The weird thing one of the targets looks fine but others have those black bars. The thing was in the name of Launch folder inside assets. Change name to LaunchImage solves the problem.
回答9:
Swift 4.2
select LaunchScreen.storyboard if its empty
回答10:
In my case I have one asset with launch images however it was displaying the top and bottom dark bar as well.
I've tried the launch storyboard solution and yes it works but I didn't want to add a new file so, this is what I did to fix the issue:
- Copied my launch images to another folder
- Removed the existing LaunchImage asset
- Added a new LaunchImage asset
- Added the images to the new LaunchImage
That's it!
回答11:
Go to target settings in xcode in that section go to App icons and launch images section in that section select launch screen file you will find a drop down of values select CDVLaunchScreeen value against launch screen file value
回答12:
This one is if you do not use storyboard at all.
It occurs when you remove LaunchScreen from Launch Screen File in App icons and Launch Images.
Instead of removing it from here go to info.plist and find Launch screen interface file base name and remove LaunchScreen, i.e. leave it blank.
It wont show in info.plist if you have removed LaunchScreen already from Launch Screen File. Then you can give any name in Launch Screen File and it will appear and you can remove the name.
回答13:
Don't Do anything that are described in earlier answers...
To show view Controller follow the following single step
Step 1 : Add the splash Screen for iPhone and iPad.
After this this error will not come again.
来源：https://stackoverflow.com/questions/32641240/ios-9-xcode-7-application-appears-with-black-bars-on-top-and-bottom