I have an UIDatePicker in my storyboard view connected to an IBOutlet in the header file.
In the implementation file I set some properties to the picker and then assign it to my textFields:
[self.txtEndDate setInputView:self.picker];
This was working fine in iOS 7, but with iOS 8 it's giving me the following error:
Terminating app due to uncaught exception 'UIViewControllerHierarchyInconsistency', reason: 'child view controller:<UICompatibilityInputViewController: 0x7c2d8800> should have parent view controller:<InserimentoDurata: 0x7aec2b10> but requested parent is:<UIInputWindowController: 0x7b92b400>'
Any idea on how to fix this?
After receiving an email from Apple's Developer Technical Support, it seems that to add a UIDatePicker (or any custom keyboard for what I've understood) to a viewController, you don't have to add it to its view anymore, but you add it to its title bar and then connect it to the IBOutlet.
It's working for me, even if it doesn't work in the iPhone 5 simulator (all the others are ok) and I was going nuts.
I hope this could be of help for other people with the same problem.
The solution is to build your UIPickerView in code (remove it from the Storyboard), assign it to the textfield's inputView, and retrieve it from there anytime you need it (instead of keeping a reference to it). Basically, this means:
UIPickerView* picker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 300, 320, 168)];
[picker setDataSource: self];
[picker setDelegate: self];
picker.showsSelectionIndicator = YES;
self.textField.inputView = picker;
If you later need it, use:
UIPickerView* pickerView = (UIPickerView*) self.datePartySizeTextField.inputView;
[pickerView selectRow:1 inComponent:0 animated:NO];
UIDatePicker should not be child of any super view
Problem:
You have to ensure that the view you will assign to inputView or inputAccessoryView don't belong to any parent view. Maybe when you create these views from xib inside a ViewController, by default they are subviews of a superview.
Solution Tips:
Using method removeFromSuperview for the view you will assign to inputView or inputAccessoryView
see detail in this link
Error when adding input view to textfield iOS 8
Related
I'm trying to create a UISwitch laid on mapView_ of Google Maps for my iOS app, but it seems not to work.
In details, I first followed instruction from google, created mapView_, then made it my viewcontroller's view:
self.view = mapView_;
Then, I created an UISwitch programmatically and added it as a subview:
mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake(50, 360, 0, 0)];
[mySwitch setBackgroundColor:[UIColor clearColor]];
[mySwitch addTarget:self
action:#selector(changeSwitch:)
forControlEvents:UIControlEventTouchDown];
[mapView_ addSubview:mySwitch];
But when I touched the switch both in simulator and device, it didn't change its state from ON->OFF or OFF->ON. I even tried different UIControlEvent, such as UIControlEventValueChanged but it didn't work. To make sure that the code should work, I tried on a normal view of a normal test viewcontroller (that means, not using google maps), it worked fine!
Does anyone have any comment about this issue?
Thanks heaps!
You can work around this issue by adding both the UISwitch and the GMSMapView to a single UIView parent, instead of adding the UISwitch as a child of a GMSMapView. Yes, this means you need to position both the GMSMapView and the UISwitch.
Hy,
so i have a question about adding a subview. I'm just created an iPad app which has a home screen i which i should add a subview at some point . But when i use :
NotesMainViewController *openNotes = [[NotesMainViewController alloc]initWithNibName:#"NotesMainViewController" bundle:nil];
[self.view addSubview:openNotes.view];
the main view imports that another view, but the controls on it like UITextField or anything else don't work. So, can please anybody tell me how can I add a view from ViewController to a another view (in that case homeViewController). I have been trying with the addsubview method but it doesn't work.
I am adding a dummy ScrollView to my app to detect a user click on the status bar, to performa an event in my program.. I am creating it in the ViewDidLoad:
//Dummy Scroll is for the tap on status bar to work
UIScrollView *dummyScrollView = [[UIScrollView alloc] init];
dummyScrollView.delegate = self;
[[self view ] addSubview:dummyScrollView];
[[self view] sendSubviewToBack:dummyScrollView];
I then implement :
- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView
{
NSLog(#"scrollViewShouldScrollToTop");
.
.
}
Under all previous versions of IOS this has worked beautifully and flawlessly, yet under iOS 6 the scrollViewShouldScrollToTop never gets called. Is this a bug?? The API says this should still be available as part of the delegate in iOS6, yet under iOS6 on both device and simulator it never executes... Anyone have any idea what is going on?
Still no other TableView or ScrollView, but there is a MAPVIEW?? But the MapView doesn't have a shouldScrollToTop that I can find to set to NO.. so I am still beyond confused why this stopped working under iOS 6...
Is there any chance that the UIScrollView you're creating isn't somehow the only UIScrollView in your view hierarchy? It looks like in iOS6, if you have more than a single UIScrollView in your view hierarchy, only one should have scrollsToTop = YES. This is the one that'll have its scrollViewShouldScrollToTop method called.
My problem was similar in that I had a very basic UITableView that would no longer autoscroll to the top when the status bar was tapped. I finally remembered that one of the cells in my tableView uses a UIWebView, and that the cell's webView.scrollView was (correctly, now in iOS6) hijacking the call to scrollViewShouldScrollToTop that, before iOS6, was being made on my tableView.
After setting the tableViewCell's "scrollsToTop = NO", the status bar autoscroll once again worked as it did before. Here's more-or-less how the code looks:
myCustomCellWithAWebView.webView.scrollView.scrollsToTop = NO;
Hope this helps!
On iOS 6, only tap the part above scrollview of status bar can fire scrollsToTop event.
And, that scrollView can't be hidden or 0 alpha.
But it can be covered. or clear background color.
So on iOS 6, you need
dummyScrollView.frame = self.view.bounds;
dummyScrollView.backgroundColor = [UIColor clearColor];
I'm very new with iOS Development and I have just created one of my first apps, in my .xib file I have a UINavigationBar that I want to hide/show when a part of the screen is tapped by the user (like in the Photo app). I've found some snippets online but I don't know where and how to use those.
I'd appreciate a lot if somebody could give me detailed informations about how to do this.
Add this toggle method anywhere in your UIViewController. This hides on first tap and shows again in second tap.
- (void)toggleNavBar:(UITapGestureRecognizer *)gesture {
BOOL barsHidden = self.navigationController.navigationBar.hidden;
[self.navigationController setNavigationBarHidden:!barsHidden animated:YES];
}
If there is no navigation controller, link the navigation bar with an IBOutlet and replace with
- (void)toggleNavBar:(UITapGestureRecognizer *)gesture {
BOOL barsHidden = self.navBar.hidden;
self.navBar.hidden = !barsHidden;
}
Then add the following in the method -(void)viewDidLoad {}
UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(toggleNavBar:)];
[self.view addGestureRecognizer:gesture];
[gesture release];
If the view where you are going to tap is a UIWebViewController, you have to add the protocol to the view controller and set it as delegate gesture.delegate = self; then add the following:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
This is needed because the UIWebViewController already implements its own gesture recognizers.
Ultimately, you want to send the -setHidden: message to your navigation bar. The easiest way to do this is to make an Outlet and an Action in your in your view controller. Then, in your .xib file, connect the navigation bar to the outlet and some button (even a large, full screen one) to the action.
Outlets and Actions are basic techniques used over and over in iOS
(and Mac) programming, so if you don't understand them, best go read
up on them now. Every beginning iOS/Mac programming book covers this
topic as does Apple's own Getting Started guide (pay particular
attention to the Configuring the View section).
Inside your action, send a message to the outlet like so:
-(void)myButtonAction:(id)sender{
[[self myNavigationBarOutlet] setHidden:YES];
}
This will hide the navigation bar whenever your button is tapped.
(This assumes you have a UINavigationBar in your .xib like you say. These directions will be different if you're working with a UINavigationController that manages its own UINavigationBar)
I am currently using XCode 3.2.3 and iOS4. I'm working on an app that simply starts with one screen and on a button click moves to the next.
I have gone thorugh the ViewController programming guide and a post here.
What I am doing is very similar to whats happening on the post. So let me explain the steps, I followed:
In IB, drag and drop, a View from the library into the editor. I renamed the new UIView to myView.
In my AppControllerDelegate, I added the new view "myView" as a property of the view controller (File's Owner). I synthesized it as well in the implementation.
Now, in the implementation of the ViewController, within the button pressed action handler, I wrote the following lines of code:
[self.view addSubView: myView];
On clicking the button however, I do not see a new screen or my new view. However if I do this, I get a new screen or new view:
UIView *anotherView = [[UIView alloc] initWithFrame:self.view.frame];
[self.view addSubView: anotherView];
I do know that the best way is to do it with separate NIBs for each UIView. However, I am new to iPhone development and have not explored that path as yet.
My question: What am I missing upto step 3?
One way you could be able to do it is by trying it this way
myView = [[MyViewController alloc] initWithNibName:#"MyViewController" bundle: [NSBundle mainBundle]];
[self.view addSubview: myView.view];
Try that and see if it is working.. if yours is a view based project then instead of [self.view addSubview: myView.view], just give [self.view addSubview : myView];