IOS 7 launch image, displaying black screen on dev

问题:

I have checked all the questions /answers related to this issue at least at stakoverflow .but without any success ,so far my issue is - I have created a new app - target IOS 7 and I have added my launchimage and my appIcon in the image.xcassets folder . when I launch my app on simulator the launchimae is showing perfectly without any issue but when I run the app on my iphone (iphone 5 , IOS 7.1) a black screen is showing instead of the launchimage any help or suggestions will be appriciated ? cheers,

回答1:

The problem is in your image. You could open your image in Preview.app, then show the Inspector (⌘I) and look at More Info tab. Wrong image will show you the following info:

and will result a black screen on the device (but will be ok in the Simulator). And the right one shood look like that:

I can't say how to fix wrong images in Photoshop. I found quite an ugly solution:

1. open wrong png in PS;
2. find and open correct png in another tab (make sure the canvas is of right size);
3. select the whole image in the wrong png and copy it;
4. paste the copied image into correct png file;
5. perform Save As... command and replace your wrong image with the new one.

回答2:

Further to the answers above, the inspector actually tells you the size that it considers valid for use, so tweak it in whatever package before importing. I have many tools but for a quick-and-clean approach, good 'ol preview comes to the rescue if you take time to explore the editing tools