I'm trying to hide the iPad keyboard from a modal view controller but it doesn't work. I have tried resignFirstResponder but that doesn't have any affect if we are in a modal view controller. I tried resignFirstResponder in a non-modal UINavigationController with the very same UIViewController and the keyboard hides correctly.
Does anyone know how solve this problem?
Thanks.
[Update] it looks like there's something wrong with my code because the resignFirstResponder does work (I made a simple test case instead of using my code). But I still don't know what the problem is.
Apparently, there is a new -[UIViewController disablesAutomaticKeyboardDismissal] method that you may override to solve this problem in iOS 4.3.
It was because I was using UIModalPresentationFormSheet. All of the other ones work as expected.... Wasted several hours on that.
This was a total pain to find. Seems like one of the poorer API designs in iOS. Much appreciation to #0xced and #manicaesar for the answers.
Here's my consolidated answer for future devs who are stuck beating their head against the wall.
If it's a single view controller, just override disablesAutomaticKeyboardDismissal and return NO.
If it's a navigation controller in a modal, create your own UINavigationController subclass like so:
In .h...
#interface MyNavigationController : UINavigationController
#end
In .m....
#implementation MyNavigationController
#pragma mark -
#pragma mark UIViewController
- (BOOL)disablesAutomaticKeyboardDismissal {
return NO;
}
#end
In your code that shows a modal view controller.
UIViewController *someViewController = [[UIViewController alloc] init];
MyNavigationController *navController = [[MyNavigationController alloc] initWithRootViewController:someViewController];
navController.modalPresentationStyle = UIModalPresentationFormSheet;
navController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:navController animated:YES];
I just confirmed the problem is indeed UIModalPresentationFormSheet and filed a bug report to apple rdar://8084017
I solved this by resizing a UIModalPresentationPageSheet. See my answer here.
Related
On iOS 5, when I try to present any view controller from another one, using presentModalViewController, the modal view is presented behind the current view.
Since it works fine on iOS 4 and knowing that presentModalViewController has been deprecated in iOS 5, I tried using presentViewController with no luck.
This is the first time I encounter this issue, any ideas on what could lead to this weird behavior?
I believe the issue is that you have not set a proper modal presentation style.
http://developer.apple.com/library/ios/documentation/uikit/reference/UIViewController_Class/Reference/Reference.html#//apple_ref/doc/c_ref/UIModalPresentationStyle
This sample should trigger a full screen modal over top of your existing view controller.
[self setModalPresentationStyle:UIModalPresentationFullScreen];
ViewController2 *vc = [[ViewController2 alloc] initWithNibName:#"ViewController2" bundle:nil];
[self presentViewController:vc animated:YES completion:NULL];
Not sure if you're using a button to present the view controller, but this should work if you are. Create a new function in your view controller like the one below. This instantiates your view and a navigation controller in your view so it can be dismissed afterwards.
- (void)buttonPressed {
UIViewController *yourViewController = [[UIViewController alloc] initWithNibName:nil bundle:nil];
UINavigationController *navigationController = [[UINavigationController] alloc] initWithRootViewController:yourViewController];
[self presentModalViewController:navigationController animated:YES];
}
And then in viewDidLoad you'd have something like this (if you were presenting it from a button). The code below is for a UIBarButtonItem, but other buttons should work in a similar manner. Just make sure you set the action parameter to #selector(buttonPressed), or whatever the name of the function you want called when the button is pressed.
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] init]
target:self
action:#selector(buttonPressed)];
I have finally found the issue. For some awkward reasons, the rootViewController of the root window wasn't set properly, leading to strange behaviors with modal views.
What is the more puzzling is that it worked fine on iOS 4 so far and failed on iOS 5. I believe I'm still missing the true reasons leading to such trouble, but correctly setting the rootViewController in AppDelegate solved the problem.
I have 2 view controllers in my project. Inside View Controller1 I want to switch to View Controller 2 by press of a button. Currently I do this
- (IBAction)startController2:(id)sender {
viewController1 vc2 = [[viewController2 alloc] init];
self.view = vc2.view;
}
This seems to work fine, but there is a big delay (4 secs) between the button press and second view controller appears. If I call the viewController2 directly from the AppDelegate things load faster. What am I doing wrong here. Any help is greatly appreciated.
Several things to consider.
Part 1: "What am I doing wrong here"?
You definitely didn't mean to do self.view = vc2.view. You just put one view controller in charge of another view controller's view. What you probably mean to say was [self.view addSubview:vc2.view]. This alone might fix your problem, BUT...
Don't actually use that solution. Even though it's almost directly from the samples in some popular iPhone programming books, it's a bad idea. Read "Abusing UIViewControllers" to understand why.
Part 2: What you should be doing
It's all in the chapter "Presenting View Controllers from Other View Controllers".
It'll come down to either:
a UINavigationController, (see the excellent Apple guide to them here) and then you simply [navigationController pushViewController:vc2]
a "manually managed" stack of modal view controllers, as andoabhay suggests
explicitly adding a VC as child of another, as jason suggests
You should consider using UINavigationController to switch view controllers. If your building target is iOS 5.0+, you can also use the new controller container concept: [mainViewController addChildViewController:childViewController].
Use presentModalViewController as follows
[self presentModalViewController:vc2 animated:YES completion:^(void){}];
and in the viewController1 use
[self dismissModalViewControllerAnimated:YES completion:^(void){}];
where ever you want to go back to previous controller.
[aController presentViewController:bController animated:NO completion:nil];
[bController presentViewController:cController animated:NO completion:nil];
when you want dismiss cController, you can do like this
[aController dismissViewControllerAnimated:NO completion:nil];
this is the flow chart.
aController → bController → cController
↑___________________________↓
You should use UINavigationController to switch view controllers.
You are on View1 and add the following code on button click method.
View2 *View2Controller = [[View2 alloc] initWithNibName:#"View2" bundle:nil];
[self.navigationController pushViewController:view2Controller animated:YES];
I am new to IOS, sorry in advance if I ask a stupid question.
I use UITabBarController and navigationController to control view.
At my last view, I would like to have a button when the button is pressed, view will return to rootViewController which I set by MainWindow.xib file and kill any process which run in app background.
this is my code in the last view before I want to back to rootViewController:
-(IBAction)doneButtonPressed:(id)sender{
JourneyIndexViewController *journeyIndexVC = [[JourneyIndexViewController alloc] initWithNibName:#"JourneyIndexViewController" bundle:nil];
[journeyIndexVC setDistanceLabelValue:self.distanceLabelValue];
[self.navigationController pushViewController:journeyIndexVC animated:YES];
[journeyIndexVC release];
[self dismissModalViewControllerAnimated:YES];
}
JourneyIndexViewController is the rootViewController that I set in MainWindow.xib.
Thank you very much for your advance support.
try
[self.navigationController popToRootViewControllerAnimated:YES];
You should take a look at this: UINavigationController Class Reference for better understanding
I am making a few assumptions here, but if JourneyIndexRootViewController is your rootViewController and is created in IB (in a nib), you do not need to re-crete it when pushing the button. It sounds like you simply need to remove the UINavigationController that you added on top of the rootViewController.
Try this. This should pop you back to the Previous View Controller.
[self.navigationController popViewControllerAnimated:NO];
Hope this helps
I am creating an application that i want to have instead of the normal UITabBarController i want to make mine so it can scroll;
So i Started by creating a simple window based application and programmatically created my UITabBar and UIScrollBar set both their frames correctly and removed the self.window.rootViewController = viewController1; portion of the code so that my app shows the scrollviewwith the tabbar and not my UIViewController
So this far everithing works as expected.
the problem goes when launching my viewControllers, i currently am using:
- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item{
if (item.tag == 2) {
UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
[self presentViewController:viewController2 animated:NO completion:nil];
}
}
the problem is that this does work but the view controller is in front of the tabbar so i can't use it to switch views again.
i have tried changing the frame of the view in the viewController so its small enough to fit the scrollview with the tab bar but it just ignores this part, so im kind of stuck here.
if anyone could point me in the right direction or tell me if im ignoring some option that i have to set will be greatly appreciated.
Thanks in advance!
Why make things difficult? just make UIButtons with custom images(images like TabBar "buttons") and put the button in a scrollview ;)
First, I would like to warn that I am a complete newbie into iPhone coding...
I need to show up a viewcontroller from a library, I know that it is modal. I have a tab bar app (created with the default XCode template). I need to show that viewcontroller, there are no problem if it hides the tabbar itself... But I am quite clueless, I don't know even what to search, or what to read...
You can call presentModalViewController:animated: to display another UIViewController modally.
EDIT: If you want to display your modal view in response to a button touch (for example), you would display it like this:
- (IBAction)buttonTouched:(id)sender
{
ModalViewController* controller = [[ModalViewController alloc] init];
[self presentModalViewController:controller animated:YES];
[controller release];
}
Then when you want to dismiss the modal controller, call dismissModalViewControllerAnimated:. This can be called either on your main view controller, or the modal one.
I don't know even what to search, or
what to read...
View Controller Programming Guide is a good place to start to help you understand view controllers (including modal ones). If that's confusing, get a bigger picture with iOS Application Programming Guide or start at the very beginning.
You can call modal view as
YourViewController *yvc = [[YourViewController alloc] initWithNibName:#"YourViewController" bundle:YES]
[self presentModalViewController:yvc animated:YES];
You can call it in the IBAction method in case you want to call it on any control event like Button Click
-(IBAction)buttonClicked:(id)sender
{
YourViewController *yvc = [[YourViewController alloc] initWithNibName:#"YourViewController" bundle:YES]
[self presentModalViewController:yvc animated:YES];
}
You can call it using self.
Hope this helps you.
If you have more doubts on this then you can ask me.