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'Application windows are expected to have a root view controller at the end of application launch'

2017-04-27 16:33 579 查看
问题:'Application windows are expected to have a root view controller at the end of application launch'

解决:

mainCr=[[DMainUIController
alloc]
init];//新建一个viewcontroller

window.rootViewController =
mainCr;//赋给rootViewController 
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