问题
I have two Icon files in my plist: icon.png icon@2x.png
Both are added to my project, added to the target and are 57x57 and 114x114 pixels respectively, both 72 dpi.
They are both pngs generated from a .svg.
I filled out the transparency with white. The rest of the coloring is black.
I have tried deleting the app, clearing derived data and re-running.
Why is this icon showing a black square in the iPhone 6 simulator?
EDIT: Tried renaming to capital I in Icon.png and Icon@2x.png. Wiped app, wiped derived data, clean, still no dice.
回答1:
Try the following:
1 - On the simulator remove your app just like you delete an app on an iPhone.
2 - On xcode go to the menu Product and click Clean. (Or the shortcut Shift+Command+K)
3 - Try to run again.
edit: When you open the png's on your computer do they actually show the white?
回答2:
So I was having the same problem and found this old thread. In my case the issue turned out to be the alpha channel in the PNG icon. Specifically: my icon was black-on-transparent, so on the simulator with a black background it showed as black-on-black. I solved by opening in Preview and exporting with the "alpha" button turned off.
来源：https://stackoverflow.com/questions/13242759/iphone-simulator-icon-black