问题
Is there a way for the Top View Controller in ECSlidingViewController to know when the sidebar menu has been dismissed, or when it is about to become the focus? i.e. a sort of viewWillAppear equivalent for ECSlidingViewController. I have a refreshcontrol in my top view controller that starts misbehaving after the sidebar is shown, so I am trying to figure out where I can call endRefreshing on the refreshControl so that the wierdness goes away. Putting it in viewWillAppear doesn't work. Thanks!
回答1:
Since ECSlidingViewController v2.0 does not have notifications, I was able to solve this in the following way. In the sidebar menu, in ViewWillDisappear I call a new category method on UIViewController called "willGetFocus." Whenever my topViewController needs to know when it's about to get focus I override willGetFocus in that view Controller like so:
In sidebar menu:
-(void) viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
UINavigationController* topViewController =
((UINavigationController*)self.slidingViewController.topViewController);
[topViewController.visibleViewController willGetFocus];
}
In Top View Controller:
-(void) willGetFocus {
[self.refreshControl endRefreshing];
}
New Category:
@interface UIViewController (KnowsFocus)
-(void) willGetFocus;
@end
@implementation UIViewController (KnowsFocus)
-(void) willGetFocus {
}
@end
来源：https://stackoverflow.com/questions/26130272/is-there-a-way-for-the-top-view-controller-in-ecslidingviewcontroller-to-know-wh