I was able to resolve the issue manually, seems like it is a bug with Xcode for now and I will file a radar report.
To resolve the issue, follow the below steps:
- Navigate to project settings （Targets-General）
- Under "App Icons and Launch Images" click on "Use Asset Catalog"
- Select "Migrate" on the popup that appears
前一段是引入：碰到这样的问题，根据下边步骤操作
1，打开targets －－》general
2。找到App Icons and Launch Images 模块 点击 Use Asset Catalog
3，在弹出窗口中选择Migrate
iOS xcode6.0使用7.1运行程序 iphone5上下有黑条
原文：http://blog.csdn.net/wxs0124/article/details/45245843
