App is not running retina in Xcode simulator

Question

I got a project from my coworker, let's name it as ProjectB , The weirdest part of this project is when I run this project in iPhone 6, I can see it's not retina. I am trying to figure out how to make this project runs as retina. For test, I created an another empty project Demo . And then I copied a UITableViewController from ProjectB and paste it in the Demo project. When I run Demo , it's retina obviously. I make two snapshot from ProjectB and Demo to compare them:

Demo runs in simulator look like this ProjectB runs in simulator look like this

As you can see, the cell looks fine in Demo but not good in ProjectB . I have set the layout constraint for their common UITableViewController. Both projects are using the same UITableViewController in a storyboard.

So, ProjectB definitely is not running as retina. I have looked the project setting, deployment target is iOS 7.0, runs in iPhone 6 simulator. What else should I look at?

Answer 1

The iPhone 6+ renders internally using @3x assets at a virtual resolution of 2208×1242 (with 736x414 points), then samples that down for display

In order to determine iphone 6+ screen in xcode , it is necessary have a picture Default-736h@3x.png

And remove Launch Screen file

Below is the list of launch image sizes and their corresponding filenames, again with iPhone 6/6 Plus bolded for reference:

Default.png: 320 x 480

Default@2x.png: 640 x 960

Default-568h@2x.png: 640 x 1136

Default-667h@2x.png: 750 x 1334 (iPhone 6, Portrait)

Default-736h@3x.png: 1242 x 2208 (iPhone 6 Plus, Portrait)

Default-Landscape-568h@2x.png: 1136 x 640

Default-Landscape-667h@2x.png: 1334 x 750 (iPhone 6, Landscape)

Default-Landscape-736h@3x.png: 2208 x 1242 (iPhone 6 Plus, Landscape)

Default-Portrait.png: 768 x 1024

Default-Portrait@2x.png: 1536 x 2048

Default-Landscape.png: 1024 x 768

Default-Landscape@2x.png: 2048 x 1536

Or use Launch Screen file @3x / @2x screens for 6 Plus/Phone 6

Answer 2

I just found out the launch screen is not set. And I figured not give it a try. And then I set select the launch screen. It worked. It is running retina.