In my UISplitViewController, I want the "master" part of the view to hide itself and the "detail" part take over the full screen when the user clicks a button in landscape. Likewise, clicking the button again takes the user back the standard, split screen view. Is it possible to do this with the built-in class?
There's a method you can implement from UISplitViewControllerDelegate in iOS5:
- (BOOL)splitViewController:(UISplitViewController*)svc
shouldHideViewController:(UIViewController *)vc
inOrientation:(UIInterfaceOrientation)orientation
{
return YES;
}
MGSplitViewController has that functionality built in for pre-ios5 work.
Related
Problem
I am having a rather big issue with the iOS7 keyboard appearance. I have a Searchbar on a UIViewController with TableView Delegation/Data Source setup (I am using the self.searchDisplayController delegates as well). I segue from this scene to a prototype tableview to show the results.
Here is the issue:
On first load I can see the keyboard being displayed when I tap into the text field of the UISearchBar. I can type and perform a search with the results being shown in the next scene.
I've added NSNotifications to view the keyboard properties in local methods keyboardWillShow and keyboardWasShown. I can see on the first scene appearance (after the view is completely loaded):
I segue to the result tableview at this point and when I navigate back and touch the text field, my keyboard shows up either fully or partially off-screen:
When I look at the keyboardWillShow notification at this point I can see that my keyboard values are incorrect:
I've researched and tried many possibilities including:
Added the following to my main view controller:
-(BOOL)canResignFirstResponder
{
return YES;
}
-(BOOL)canBecomeFirstResponder
{
return YES;
}
Configured the following in my view did load
self.searchDisplayController.searchBar.spellCheckingType = UITextSpellCheckingTypeNo;
self.searchDisplayController.searchBar.autocapitalizationType= UITextAutocapitalizationTypeNone;
self.searchDisplayController.searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
self.searchDisplayController.searchBar.keyboardType = UIKeyboardTypeDefault;
Put in standard stubs for:
-(void)searchDisplayController:(UISearchDisplayController *)controller didShowSearchResultsTableView:(UITableView *)tableView
-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
I've noticed that if I choose a Partial Curl as my segue mode, the keyboard remains accessible when I roll back to the main view controller (but then it was never fully off screen in that case). However if I move from the results tableview to a detail scene and then navigate back to the main view controller, the keyboard appears off-screen again.
Question
Is there a method I can use to intercept the misplaced keyboard so that it displays in the default location?
NB: Along these lines, I have created a NSDictionary property to hold the initial userInfo values with the correct keyboard placement. I am not sure how to reassign these values to get the keyboard to return to it's original placement.
BTW - This seems a bit of a hack to get the keyboard fixed due to a bug in IB, is there some other way that I can try to remedy the situation?
Thanks in advance for any feedback!
Solution
This was such an obscure issue that I'm sharing the solution to save the next person some effort. Like most programming issues, it turns out this one was self-inflicted. In my original iteration of this project I had turned off rotational support as I am learning auto-layout and I wanted to ease into the transition from Springs and Struts. Somehow between the start of the project and the code release I ended up with this bit of code in the Main Scenes' View Controller.
//BAD
- (NSUInteger) supportedInterfaceOrientations
{
return !UIInterfaceOrientationPortraitUpsideDown;
}
instead of returning a valid enumeration like...
//OK
- (NSUInteger) supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskAll;
}
There are many tabs in my screen,I want to give an alert box which says "Do you want to save the changes?" if user changes anything in the page, without clicking on the save button provided in the page,he is clicking on diff tab.
I'm able to get the alert view but the tab click moves the screen to the tab which was clicked. The screen should not change until the alert view is answered.
Can anyone let me know how to suppress the screen change until the alert view is answered ?
This doesn't directly answer your question, but: what you're trying to do sounds like bad UI design. (In general, if it feels like you are fighting against UIKit, you're probably doing it the wrong.)
In this case: if you really want to ensure that a user taps a Save button before moving to a different screen, you should present that screen in a modal view, so that it is impossible to navigate to any other part of the app.
In other words, if you want to prevent a user from navigating away from a screen, don't show them buttons or tabs that would allow them to navigate away. Otherwise, you're just making more work for yourself and frustrating a user.
Implement UITabBarControllerDelegate in your app delegate's applicationDidFinishLaunching
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
self.tabBarController.delegate = self;
[window addSubview:self.tabBarController.view];
}
Then use the below delegate method,
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController;
This method is called before the tab switch and you can return no here to disable that and show an alert message instead. Once the user has performed the save either he can press on tab again or you can programmatically switch to the new tab as,
self.tabBarController.selectedViewController = [self.tabBarController.viewControllers objectAtIndex:0];
Add this inside your delegate,
How about this for switching to the tab programmatically,
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
if () {
//some code
} else {
//some other code
self.tabBarController.selectedViewController = viewController;
}
}
I have an app which has split view inside a tab bar, and these split views often have navigation hierarchy and then sometimes modal views are presents on top of them, and it all works fine, but...
I am trying to display a passcode lock whenever the app goes into background, so I put
[self.window.rootViewController presentModalViewController:lockView animated:YES];
in my AppDelegate's method
- (void)applicationWillResignActive:(UIApplication *)application
...which works fine unless a modal view is displayed.
the passcode does not display if a modal view is open.
Is there a way to retrieve the currently active view controller so I can present this lock view?
Thanks in advance
Cheerio
Code that worked was as follows:
BOOL hasKids = YES;
UIViewController *topViewController = (UIViewController*)[[(UITabBarController*)self.window.rootViewController viewControllers] objectAtIndex:((UITabBarController*)self.window.rootViewController).selectedIndex];
while (hasKids) {
if (topViewController.presentedViewController) {
hasKids = YES;
topViewController = topViewController.presentedViewController;
} else {
hasKids = NO;
}
}
[topViewController presentModalViewController:lockView animated:YES];`
I think the easiest way is to keep track of which tab is currently active (there are a number of ways to do this, but I'd recommend implementing the UITabBarControllerDelegate and handling its tabBarController:didSelectViewController: method).
Once that's done, you'll probably need to manage a property in each view controller that holds any modal view controllers you present. If, however, you're on iOS 5 or higher, look into the UIViewController property presentedViewController. It appears that this is a new way to do exactly what you want.
I have a number of view controllers that I want to navigate; however, I need to implement an intuitive way to move to previous ones. For the button press methods in my view controller custom classes to move forward, I do something like this:
NextViewController *next = [self.storyboard instantiateViewControllerWithId:#"NextViewController"];
[self presentModalViewController:next animated;YES];
With this in mind, how can I return back to previous views?
Why not just use the built in UINavigationController? You can hide the navigation bar and use custom controls to push and pop controllers as you wish
When using modals you simply add a button that links to the action:
-(void)goBack:(id)sender {
[self dismissModalViewControllerAnimated:YES];
}
I have an application that presents a view controller (for registering / logging in) with a container view, and two views as switched between eachother using horizontal flipping. The app itself can be used before registration. I'm looking to change the way this is handled with storyboarding.
So upon opening the app there's a login button. If the user taps login a view controller is presented using Cover Vertical animation. On the top left of this view controller is a button to Register. Tapping on that does modal segue with a Horizontal Flip animation. On the Register view controller there's Login and Cancel buttons. I want Login to return to the login screen, and Cancel to go back to the view controller that was displayed using the Cover Vertical animation. Getting it there is fine, but the animation used is the Horizontal Flip animation, and not a (un)Cover Vertical animation.
I'ved tried the following code:
self.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
before dismissing the view controller, but it's still flipping instead of uncovering.
Thanks for the help!
~James
I see no reason that shouldn't work, but as an example here's the code I would use:
[self setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[self dismissModalViewControllerAnimated:YES];
I suggest trying this, it works well for me.
for Swift you can call this:
viewController.modalTransitionStyle = .coverVertical
viewController.dismiss(animated: true, completion: nil)