iOS7.1 Xcode7 Run-time solution for black-and-dark edges

4s to run, or good.
Retina (3.5-inch):

One to 5 above the screen, it becomes this:
Retina (4-inch):

Workaround:
Add default.png, [email protected], [email protected] Three pictures come in, you can add to supporting Files .

Add the following three bright black pictures, added and then run, there is no problem.

Default.png

[Email protected]

[Email protected]

If the upper and lower black edges still exist after adding, delete the app in the simulator, Product--clean once, and then rerun.

iOS7.1 Xcode7 Run-time solution for black-and-dark edges