I have a UIToolbar as part of my UINavigationController. The UIToolbar has several plain UIBarButtonItems on it, each with custom images I specified in interface builder. My images don't fit quite as centered as I'd like, so I apply a small image inset to the top in the size inspector.
The button on the left has no inset, and the one on the right has an inset on the top of 6.
However, it seems that whenever the toolbar is redrawn (after coming back from a modal view, or hiding and unhiding the toolbar), the button with an inset shrinks more and more—like the inset is getting reapplied every time. So it looks like this:
Is this a bug in iOS, or am I doing something wrong?
Thank you in advance.
I had this same problem with an iPhone app specifically when returning from a modal view. The way I handled it was to fire off an NSNotification when the Modal is being dismissed that the views which were having issues would listen to. Kinda Like this.
[[NSNotificationCenter defaultCenter]postNotificationName:#"DismissingModal" object:nil];
Then register it in your other class to fire your method.
[[NSNotificationCenter defaultCenter]addObserver:self selector:#selector(drawRect:) name:#"DismissingModal" object:nil];
When are you adjusting the inset for your image? If you are doing it in ViewWillAppear (or ViewDidAppear), that method is being called again when the modal is being dismissed.
Perhaps you can make the inset adjustment in ViewDidLoad instead?
Related
So I have a UIScrollView in my app's menu. I have paging enabled and each page contains a button and an image. I would like to add a little animation where these start to shrink as they disappear off the screen (when the user scrolls to the next page).
I know I could do this by creating a property for each button and image and then manually changing the frame size in the scrollViewDidScroll method.
Does anyone have a more elegant solution so that I dont have to hard code each one in? It is possible that there's a predefined attribute for this or something?
Is each "page" in the scrollview actually a view or view controller? Whatever it is, hopefully it's an instance of some class, and thus reusable. Add a method to the custom view/view controller that uses the UIView animateWithDuration: methods to make the button and image shrink. Call that method when you determine that the scroll view has moved enough.
I've got a detail view with various labels and such providing information about a place (address, phone, etc.). The information provided is taller than an iPhone screen so they're all in a UIScrollView (itself inside a UIView) that allows you to swipe up and down to see everything.
I also have an MKMapView inside the scrollview. When it's not attached to anything in Interface Builder it moves up and down with the scrollview, as it should, staying in it's correct relative position to the other controls in the scrollview. You can play with the map, zooming and panning it, etc. and it shows your current location by default.
However, as soon as I hook it to an MKMapView variable in IB, the mapview no longer scrolls with the scrollview. Instead it literally just sits in the position it's originally displayed in (bottom of the view, with a little of the map hidden below the bottom of the view) and the scrollview scrolls up and down behind it.
What's happening here? I've tried changing a bunch of the mapview's and scrollview's properties in IB, but it has no effect. The only thing I haven't tried is just creating the mapview entirely in code, but that doesn't seem like an obvious solution.
EDIT: Sorry to everyone about the expired bounty. I got hung up in other areas of the project and couldn't get back here until now. I didn't know it would expire.
FURTHER EDIT: Well, I figured out my problem. For reasons completely unknown to me I had
[self.view addSubview:mapView];
in the viewcontoller's ViewDidLoad. Once it was hooked up then that line of code would (obviously) make the map a subview of my of view, effectively yanking it out of the scrollview.
Stupid mistake, sorry to have wasted your time (and the bounty). I'll delete this question after I think the answerers have had a chance to see the result.
Looking like as you are using the ScrollView,you need to scrolling facility in your DetailView.
Instead of using the ScrollView ,I had an alternative of this ....
You can try your hard luck by using the TableView instead of ScrollView.
Just take all the labels and mapView in a single View and then put that view in the header of the TableView.
like this :
UITableView
--> View
------>All Labels // Inside the singleView
------>MKMApView // At bottom of the View
Still You can play with the map, zooming and panning it, etc. and it will show your current location by default.
Hope this alternative can solve your problem.......
All the Best
If hooking up an outlet in IB is breaking an otherwise working view, you might be able to try this to locate the view at runtime:
- (UIView *) findClass:(Class) aClass inView:(UIView *) aSuperview {
for ( UIView *view in aSuperview.subviews ) {
if ( [view isKindOfClass: aClass] ) break;
if ( ( view = [self findClass: aClass inView: aSuperview] ) ) break;
}
return view;
}
- (void) viewDidLoad {
MkMapView *map = [self findClass: [MkMapView class] inView: self.view];
}
I figured out my problem. For reasons completely unknown to me I had
[self.view addSubview:mapView];
in the viewcontoller's ViewDidLoad. Once it was hooked up then that line of code would (obviously) make the map a subview of my of view, effectively yanking it out of the scrollview.
Do you have setContentSize property set to the content's size in the viewDidLoad method of the UIViewController?
i am creating a dropdown button in my app. Like a pop-up control which is available in webapps. so when i click on a button, a new UIView containing a UIPickerView appears. i user beginanimations and commitanimations for dispalying and hiding the UIView. the new uiview is half the size of the scrollview.
I want that whenever the new uiview appears, the size of the scrollview should alter so that the i can scroll through the entire view. something like, when a keyboard appears, we reassign the size of scrollview, so that we can scroll entire view.
So how will i know, when the uiview appears. Is there a notification for beginanimations and commitanimations like for keyboard (UIKeyboardDidHideNotification)
thnx in advance.
if the subview you create and show have a viewController, -(void)viewWillAppear method of the viewController will be called on every appearance of that view.
In that method, you can somehow get the superview (for example calling nextResponder method) and resize the superview according to your needs.
Hope that helps.
I have a UIButton within a UIView. The button is docked on the bottom of the view using the Autoresizing Masks. The button is working fine when the view initially loads and the IBAction is being called successfully.
Now when I resize the height of the parent view the button stays docked at the bottom of the view, however now only half of the button responds to the touch events. If I resize the parent view height a bit larger then the button completely doesn't respond anymore.
Any ideas why this would be occurring?
It sounds as if you've got another view, most likely a transparent one, that is resizing improperly and covering up part of the button.
It seems that I was moving the main view as the inner view height was changing. I guess if the UIButton is outside the bounds of the self.view then touches are not received.
I have built a view for an iPhone app in Interface Builder. It is a UIScrollview with a UIView and a UIButton on the UIView. The only code I have is setting the scroll view's contentSize to 320x550 in the viewDidLoad method of the xib's File Owner class. When the button is within the normal view area (320x480) the button responds as normal, but if is placed outside of those boundaries in Interface Builder the button will not respond when I scroll to it and click the button.
What am I missing? I figure it might be something I need to set on the UIView. But I am not sure what that is.
Your UIButton won't response even it's visible because it's not in the boundary of parent view. You can see object outside the boundary of its parent view because it's a default behavior of UIView to draw all subview (clipsToBounds = NO)
To see the truth, try this code.
UIView *yourUIView = ...
yourUIView.clipsToBounds = YES;
yourUIView.backgroundColor = [UIColor cyanColor];
You will no longer see your UIButton.
To fix this, enlarge your UIView.
I had the same problem as the person who posted the question. Thanks to the first answer, I had a hint as to what to do. I increased the height of the view by adjusting the frame. This, apparently must be done in code. Once this was done, however, the toolbar at the bottom was no longer visible. So before I adjust the height of the view, I grab the position of the tool bar. Then after adjusting the height of the view, I reset the position of the tool bar. Now all is good.