RT。A，B，C，D，E为五个控制器。A push B present C push D present E怎么返回A
1 [[UIApplication sharedApplication].keyWindow.rootViewController dismissViewControllerAnimated:NO completion:^{ 2 [((UINavigationController *)[UIApplication sharedApplication].keyWindow.rootViewController) popToRootViewControllerAnimated:NO]; 3 }];
A push B present C push D present E怎么返回A
原文：http://www.cnblogs.com/wronganswer/p/6648896.html