I've set up scrollTopTop property in my UIScrollView to YES however, when I tap on my status bar it didn't work. Why is this?
I have a UIViewController called A and inside A I have a UIViewController B, which has the UIScrollView. Is this the reason why it's not working?
Make sure of somethings:
Scrollview is at the front.
Make sure it's re-enabled after you add/remove your status bar.
There is only one scrollview because many of them will prevent it from scrolling to top.
Make sure that B view at front as well of A view.
Sorry but the question has to have more details so that we can help :)
UIViewController B should be added in UIViewController A.
like this, when you added b.view in a, you should add this code :
[self addChildViewController:b]
I had an app where scrollsToTop was working. Later on, I added a UICollectionView and scrollsToTop stopped working. After tracking down the offending revision I had to set UICollectionView.scrollsToTop = NO. I overlooked the fact that UICollectionView also inherits from UIScrollView.
Related
I do understand how to go about making the UIKeyboard push up the UIView if the active UITextView is blocked by the UIKeyboard as per this question: How to make a UITextField move up when keyboard is present?.
What I'm wondering is, from a design perspective, how do you go about implementing the keyboardDidShow and keyboardDidHide methods so that all of the views in your app, whether they be a UIView, UITableView, or UIScrollView all have this functionality and so you need to implement these methods only once?
The only way I could think of would be to have the view property of the UIViewController always set to a UIView, and if you have a UIViewController that needs a UIScrollView or UITableView, just attach it as a subview to this. Then if the UITextView is being blocked, just move the parent UIView up so it will move all of the views that are attached to it.
Does this sound like a good plan, or is it even worth it? Anyone else have any other ideas?
This is a little old, but it's a great article about using firstResponder methods to tell views to slide up. I, personally, like to put my UITextField in a parent container and move it all up. However, I do NOT suggest putting everything in there and moving it all up, because the UITextField "feels" better just above the keyboard. But I do like the background or certain items to move up with the UITextField.
See below: http://cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html
This is a nice implementation that moves the field up based on the section of the screen it's in (upper, middle, lower). Works very well. May need to be updated for newest SDK, but should be pretty easy.
In experimenting with this, I noticed that if you want to make a BaseViewController that implements this functionality to work for everything that inherits from it, you have to attach another view on top of the UIViewController's view property in order to get it to work. Reason is, if you push the UIViewController's view property up when the keyboard appears, then it resets itself if the app comes back from being active and it's messy.
The problem with this however, is now in all of your child classes you have to attach your subviews to this new view property instead of the regular view property. Also, you probably have to make a custom UITableViewController which will inherit from your BaseViewController class so it can inherit the keyboard notification methods.
Ultimately, I've found it's not the worst idea to have another view on top of the UIViewController's property for a bunch of different scenarios. Making a custom UITableViewController isn't that big of a deal either. So if you have a lot of text fields in your app, this might not be the worst way to go.
I think have decent experience working with iPhone development.
as much I know.. I did set up the delegate..
I have from top to botton
UIView --> UIScrollView--> UITextView
I tried everything... to get the event scrollView to fire the scrollViewDidScroll event.
is anything wrong with the structure..
there not much of the code to post here.
what I am trying to do is.. do something when UITextView is scrolled.
Sorry did not respond... Just wanted to share in case anyone need this...
I used delegate methods of parent i.e. UIView for UIScrollView i.e. Child it worked..
It's hard to say without some code or a screenshot. Is the scroll view actually scrolling? If you set it up in Interface Builder, did you change the size of the scroll view's contentSize in code so that it can actually scroll? Maybe the text view is eating the scroll events; did you try setting the text view's delegate to see if it's firing a scrollViewDidScroll event?
i added some views (every view has its own viewcontroller and nib) to an UIScrollView. How can I access the ScrollView from within the UIViews I've added?
self.view.superview doesn't get me the UIScrollView properties. I need to disable scrollEnabled from within an UIView.
Thank you!
Maybe try (UIScrollView*)(self.view.superview).property to access the property you want :-)
It should work.
But maybe with an Delegate it would be better :-p
Good Luck !
I have a View Controller, and a UIImageView as a subview. That UIImageView also has a subview of that same type.
I have:
self.userInteractionEnabled = YES;
set for each. My touchesEnded code was working. Any idea what would cause this? No touches are even reaching the touches events. I don't understand?
Any help appreciated.
Thanks // :)
Sounds like you've gone all the way up the chain and checked the self.userInteractionEnabled all the way up to the top, right? Ok, now check if any view has exclusiveTouch set to YES.
Also, if you called resignFirstResponder on the parent view, instead of a UIText field, you would relinquish events.
Lastly, beginIgnoringInteractionEvents, can cause this too.
I just found this solution from saimhann2002 who was having a similar problem.
Thanks for the reply. I have been able to fix the problem now. The issue was that I was adding the subview to the MKMapView rather than the view of the ViewController. I don't know why this is an issue. If you do I would be interested to hear. Adding the view as a subview to the view of the ViewController fixed everything, with the view now accepting the touches, even when its colour is UIColor clearColor.
That works!
I have a series of UIViews inside a UIScrollView, and the UIViewControllers for those views are not receiving the touch events. If I take the views out of the scroll view then it works.
I have enabled userInteraction on the views but it's still not working!
This must be possible and I'd be really grateful if someone could point me in the right direction!
Thanks,
Mike
Do the views have their own touch handlers, or are you relying on the viewcontroller to get the touches? Depending on how you have set things up, the views may be handling the touches without passing through to the view controller.
I have overcome this issue by overriding the loadView method of the view controller, and setting the view's instance variable to a simple UIView subclass which passes on the touches.
Check what you are returning in scrollview delegate method view for scrollin in scroll view.
As mahboudz mentioned - check if you have any custom handler for touch event. If not, please have one. Its far more relief to do whatever you want to do with your view. Check out Apples sample app from scrollViewSuite. They have tapDetectingImageView delegate. I used the same in my app it worked great! Hope this helps!
You may find this post useful. It's an example of a pretty clean way of intercepting events.
Have touch handlers for view for which you want to receive touch events and that will work.