Warning: Attempt to present A on B whose view is not in the window hierarchy!

 [self addChildViewController:_attention];
 [self addChildViewController:_allControll];

<img src="http://img.blog.csdn.net/20150414164759227?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMDA3MDUyNg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

改后运行，有效果，但输出台显示如下，
Presenting view controllers on detached view controllers is discouraged <AttentionController: 0x7ff9d40376c0>.


此时应该回到被选中的cell时，添加父controll
[self.parentViewController presentViewController:listVC animated:YES completion:nil];

Warning: Attempt to present A on B whose view is not in the window hierarchy!

原文：http://blog.csdn.net/u010070526/article/details/45043639