First I subclass UIView named MyTextEditorView for overwrite it's inputAccessoryView as readwrite property.
#property (retain, readwrite) UIView *inputAccessoryView;
And I initial UIInputView as display view,then add one UIView as subview;
UIInputVIew *myInputAccessoryView = [[UIInputView alloc] initWithFrame:CGRectMake(0,0,screenWidth,44)];
[myInputAccessoryView addSubview:myDisplayView];
[self setInputAccessoryView:myInputAccessoryView];
[self reloadInputViews];
And I have overriden canBecomeFirstResponder for return YES；
- （BOOL）canBecomeFirstResponder
{
return YES;
}
When I first initial MyTextEditorView in my viewController1 and make it become first responder,then inputAccessoryView automatically appear.But when I push another viewController2 from this viewController1 and back to viewController1 ,inputAccessoryView will not automatically appear after make it become first responder.
However,when I add some code as following:
UIInputVIew *myInputAccessoryView = [[UIInputView alloc] initWithFrame:CGRectMake(0,0,screenWidth,44)];
[myInputAccessoryView addSubview:myDisplayView];
[self setInputAccessoryView:myInputAccessoryView];
[self resignFirstResponder];
[self reloadInputViews];
[self becomeFirstResponder];
After then, this inputAccessoryView can automatically appear in any case.But this confused me and anyone can help me raise why the inputAccessoryView can't appear automatically?Thanks in advance!!!
I test this question on both iOS7 and iOS8. And I find it's an iOS8 bug.After I replace UIActionSheet with UIAlertController on iOS8 platform, this works well.
I guess that UIActionSheet as subclass of UIView is different from UIAlertController as subclass of UIViewController which maybe conflicts with my editor
Related
I am trying to create a camera overlay that can recognize swipe gestures to push to other views.
I am wondering if I can still use the UIImagePicker or if I have to use the AVCaptureSessionManager.
Also i would prefer to create the overlay view in the story board is there a way to do that?
can I select a view inside the storyboard controller be the camera overlay and simply present the UIImagePicker on view did load?
I've never used the Storyboard to create a camera overlay, but I have created a xib which works fine. You can create the overlay viewController in the normal (xib) way, complete with gesture recognizers, then you can handle them directly in that VC or use a delegate (most likely the VC which presented the camera).
Some code -
-(void)setupCamera
{
self.picker = [[UIImagePickerController alloc] init];
_picker.sourceType = UIImagePickerControllerSourceTypeCamera;
_picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
self.overlay = [[OverlayViewController alloc] init];
_overlay.delegate = self;
_picker.cameraOverlayView = _overlay.view;
_picker.delegate = self;
[self presentViewController:self.picker animated:YES completion:nil];
}
The overlay -
-(id)init
{
self = [super initWithNibName:#"OverlayViewController" bundle:nil];
if (self)
{
// set up stuff
}
return self;
}
... & some code which handles the swipe -
-(IBAction)swipe:(UISwipeGestureRecognizer *)sender
{
// swipe stuff
[self.delegate doSwipeStuff]; // if you want the delegate to handle it
}
Hope this helps.
I've spend hours on this and can't get it to work. Hope that someone can help me.
I have a UIPageViewController which works perfectly when I add it to my default view when the application starts. This is what I do:
//Step 1
//Instantiate the UIPageViewController.
self.pageViewController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl
navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
//Step 2:
//Assign the delegate and datasource as self.
self.pageViewController.delegate = self;
self.pageViewController.dataSource = self;
//Step 3:
//Set the initial view controllers.
ContentViewController *contentViewController = [[ContentViewController alloc] initWithNibName:#"ContentViewController" bundle:nil];
contentViewController.labelContents = [self.modelArray objectAtIndex:0];
NSArray *viewControllers = [NSArray arrayWithObject:contentViewController];
[self.pageViewController setViewControllers:viewControllers
direction:UIPageViewControllerNavigationDirectionForward
animated:NO
completion:nil];
[self addChildViewController:self.pageViewController];
[self.view addSubview: self.pageViewController.view];
Now I want to use a navigation controller in my initial view which then pushes the UIPageViewController on the stack, when the user clicks on a button. This works too, but when I'm in landscape mode the UIPageViewController shows only one page (which is horizontally streched) and not two, as it should be. I need to rotate the device to portrait and then back to landscape mode to force the UIPageViewController to show both pages.
I'm adding the UIPageViewController to the navigation controller with:
[self.navController pushViewController:self.pageViewController animated:NO];
When i debug my code I see that without the navigation controller the delegate methods of the UIPageViewController are called on startup. When I push the UIPageViewController on the navigation controller they're not called until I rotate the device.
Does anyone know how to solve this? Thanks in advance for any help/tips on this.
Figured this out with help from this thread.
The key is setting the spineLocation on the pageViewController when you create it through the options dictionary:
options = [NSDictionary dictionaryWithObject: [NSNumber numberWithInteger:UIPageViewControllerSpineLocationMid]
forKey: UIPageViewControllerOptionSpineLocationKey];
And this option should be put inside of a check to see what the current interface orientation is.
In the above mentioned thread, the interface orientation is checked by a ternary operator; I put it in an if-statement so that I can use the same opportunity to tack an extra UIViewController onto the viewControllers array.
If the interface orientation is portrait, 'options' will still be nil when the pageViewController is created, and so it'll go on to create it in portrait mode with only one viewController.
Here's my whole viewDidLoad code in BookViewController:
- (void)viewDidLoad
{
[super viewDidLoad];
_modelController = [[ModelController alloc] init];
DataViewController *startingViewController = [self.modelController viewControllerAtIndex:0
storyboard:self.storyboard];
NSMutableArray *viewControllers = [NSMutableArray arrayWithObjects:
startingViewController,
nil];
NSDictionary *options;
if (UIInterfaceOrientationIsLandscape(self.interfaceOrientation)) {
DataViewController *secondViewController = [self.modelController viewControllerAtIndex:1
storyboard:self.storyboard];
[viewControllers addObject:secondViewController];
options = [NSDictionary dictionaryWithObject: [NSNumber numberWithInteger:UIPageViewControllerSpineLocationMid]
forKey: UIPageViewControllerOptionSpineLocationKey];
}
self.pageViewController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl
navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal
options:options];
self.pageViewController.delegate = self;
[self.pageViewController setViewControllers:viewControllers
direction:UIPageViewControllerNavigationDirectionForward
animated:NO
completion:NULL];
self.pageViewController.dataSource = self.modelController;
[self addChildViewController:self.pageViewController];
[self.view addSubview:self.pageViewController.view];
// Set the page view controller's bounds
self.pageViewController.view.frame = self.view.bounds;
[self.pageViewController didMoveToParentViewController:self];
// Add the page view controller's gesture recognizers to the book view controller's view so that the gestures are started more easily.
self.view.gestureRecognizers = self.pageViewController.gestureRecognizers;
}
I am presenting a popover with my viewcontroller:
UIBarButtonItem *barButton = (UIBarButtonItem*)sender;
SettingsViewController *settingsViewController = [[SettingsViewController alloc] initWithNibName:nil bundle:nil];
[self presentPopoverFromBarButtonItem:barButton andController:settingsViewController andSize:CGSizeMake(RECT_POPOVER_SETTINGS.size.width, RECT_POPOVER_SETTINGS.size.height)];
and inside this view controller I have a button that pushes another view controller.
AnotherViewController *anotherViewController = [[AnotherViewController alloc] initWithNibName:nil bundle:nil];
[self.navigationController pushViewController:anotherViewController animated:YES];
Now in this view controller I have an action, and when it's done I do:
[self.navigationController popViewControllerAnimated:YES];
Now the strange behavior is that when I pop the view controller, the
viewWillAppear
method gets called in SettingsViewController, then the breakpoints come back to pop method inside my anotherViewController.
This is a universal App so I am using this same setup on the iPhone, but without the initial UIPopOverController. This is functioning properly in the iPhone (with no popovers, pop method gets called first, then viewWillAppear), but on the iPad the viewWillAppear gets called first, then pop.
So my question is, can somebody explain why this is happening?
Thanks.
I am trying to build a view where a user can select an image and it is retained within that view after navigating away from the view and coming back again. As a simple test app, I have created two view controllers. The first view controller has a forward button and uses a modal segue to go to the second view controller. The second view controller has a back button (modal segue back to first view controller) a Choose button and a Image button. So far I have configured the choose button to use the imagepickercontroller to select an image from the library and display onto the button which works no problem. The issue is that when i press the back button and the forward again back to the same screen the image isn't retained i have to reselect it. The intention is for the user to be able to take a picture or video of themselves performing an action and then select it within this app and have the picture displayed there for future reference.
My coding is as follows:
ViewController.h
#interface ViewController : UIViewController
<UIImagePickerControllerDelegate, UINavigationControllerDelegate>
{
IBOutlet UIButton *selectFromPhotoLibraryButton;
IBOutlet UIButton *displayPictureButton;
}
#property (nonatomic, retain) UIButton *selectFromPhotoLibraryButton;
#property (nonatomic, retain) UIButton *displayPictureButton;
- (IBAction)selectPicture;
#end
ViewController.m
#implementation ViewController
#synthesize selectFromPhotoLibraryButton;
#synthesize displayPictureButton;
-(IBAction)selectPicture
{
if([UIImagePickerController isSourceTypeAvailable:
UIImagePickerControllerSourceTypePhotoLibrary])
{
UIImagePickerController *picker = [[UIImagePickerController alloc]init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
[picker release];
}
}
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo: (NSDictionary *)info
{
UIImage *image = [[info objectForKey:UIImagePickerControllerOriginalImage] retain];
[displayPictureButton setImage:image forState:UIControlStateNormal];
[self dismissModalViewControllerAnimated:YES];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *) picker
{
[picker dismissModalViewControllerAnimated:YES];
}
Please let me know if you require any of the other bits of code (its only the default app stuff, no further modification).
As looking to your problem
I think you have to store selected image in NSUserDefault as archived data or something like that.
When u come back to second view then check first in NSUserDefault for image is saved or not.
If u got it then assign it to UIImage object by unarchiving.
As I have not implemented it so can't be sure.
I've just set something like this up myself, I have the chosen image immediately placed in a UIImageView.
First, set up your view controller as a UIImagePickerDelegate:
<UIImagePickerControllerDelegate, UINavigationControllerDelegate>
Then wherever you want to init the UIImagePicker, alloc, init and set its delegate to self:
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
[imagePicker setDelegate:self];
[self presentViewController:imagePicker animated:YES completion:nil];
And then I have the image picker storing the UIImage into the ImageView and also into the NSUserDefaults.
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo: (NSDictionary *)info {
UIImage *image = [[info objectForKey:UIImagePickerControllerOriginalImage] retain];
[userDefaults setObject:image forKey:#"image"];
[userDefaults synchronize];
[self dismissViewControllerAnimated:YES completion:^{
[self updatePreviewImage:image];
}];
}
- (void) imagePickerControllerDidCancel:(UIImagePickerController *) picker {
[self dismissViewControllerAnimated:YES completion:nil];
}
I hope this works for you, and anyone else that view this post.
I am building my first iPad application. And one of my requirements is to deal with UISplitviewcontroller and UINavigationController.our proposed view hierarchy is (LoginView) ->UINavigationView(LandingView + CollectionView)->UISplitViewcontroller( DetailsView).Our app supports only landscape mode
I am referring this SO Question( and GILT app as well), as a newbi its hard for me to get it done based on that description.
So my questions are
1) How can I achieve same thing,if somebody can give small code snippets or reference to tutorial
2) As per Apples HIG, UISplitviewcontroller should be rootviewcontroller,what if it not. Will apple reject my app.(apparently GILT group has been approved)
3) I found MGSplitViewController , can I use that one not as root?
Any help would be appreciated. As a newbi i hope my question is genuine
If you want to use the out-of the box splitView it must be root; any hokeary-pokery here will either break apples guidelines or manifest very odd behaviour.
The MGSplitViewController is completely custom implementation of a SplitViewController. Its very good if you need that sort of thing, but some of the features are based round the fact that our app will be orientating.
Alternatively you could make your own. I have done this more than once and is easier than it sounds.
(LoginView)
->UINavigationView(LandingView + CollectionView)->UISplitViewcontroller(
DetailsView).
Based on an out-of-the-box UISplitView, I would suggest:
Make the splitView the root View.
Pop (not animated) a full screen Modal as soon as the app starts and allow the
user to navigate the loginView,
LandingView and collectView in this; i also recommend using a navController here.
Once the user is ready to proceed to
the splitView, populate the
splitView's rootView Controller and
DetailViewController with whatever
you want then ,animate the Modal out.
Dave does have a point, but i would look at it from the point of view that you are removing the choice of orientation from the user; removing standard choices (like supported orientations) because the designer assumes some configuration is more efficient will only annoy some users.
I did it by making a method in my detailViewController:
-(void)popHomeScreen:(BOOL)animated//OPENS THE HOMESCREEN IN A MODAL DISPLAY
{
firstRun=NO;
//myViewControllerForPopOver init here
myViewControllerForPopOver.modalPresentationStyle = UIModalPresentationFullScreen;
myViewControllerForPopOver.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;//simple anime
if (animated) [self presentModalViewController:myViewControllerForPopOver animated:YES];
else [self presentModalViewController:myViewControllerForPopOver animated:NO];
}
Then Call it in the detailViewControllers ViewDidAppear method:
-(void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
if(firstRun)[self popHomeScreen:NO];
}
//YOU WILL ALSO NEED TO MAKE 'firstRun=YES' in viewDidLoad
//firstRun is a BOOL
As for the root disappearing (leaving a big black space)..thats a known bug. though i thought for a while that it was caused by ordering an animation while/just before it was going to draw itself.
Also, i found that if i popped a full screen modal over the splitView then popped another form based modal (for example) quickly after it the full screen modal didn't draw properly.
SplitViews are like your mother-in-law, you don't really like them and when you have to use them you have to tip-toe round the landmines.
Try this, it works for me
1) in app delegate's didFinishLaunchingWithOptions make your login view to root view
self.window.rootViewController = self.loginViewController;
also, init the split view as the template do ( but not add to self.window)
MasterViewController *masterViewController = [[[MasterViewController alloc] initWithNibName:#"MasterViewController_iPad" bundle:nil] autorelease];
UINavigationController *masterNavigationController = [[[UINavigationController alloc] initWithRootViewController:masterViewController] autorelease];
DetailViewController *detailViewController = [[[DetailViewController alloc] initWithNibName:#"DetailViewController_iPad" bundle:nil] autorelease];
UINavigationController *detailNavigationController = [[[UINavigationController alloc] initWithRootViewController:detailViewController] autorelease];
self.splitViewController = [[[UISplitViewController alloc] init] autorelease];
self.splitViewController.delegate = detailViewController;
self.splitViewController.viewControllers = [NSArray arrayWithObjects:masterNavigationController ,detailNavigationController, nil];
2) add a swap view controller in app's delegate, which swap the root view to split viewcontroller.
-(void)swapToViewControllers:(RootViewControllerType)viewType
self.window.rootViewController = self.splitViewController;
3) invoke the swapToViewControllers in your login view.
Keep in mind that the HIG strongly encourages you to support all orientations. Unless you have a very, very good reason to support landscape only, you'll probably be rejected.
See page 19 of the HIG: http://developer.apple.com/library/ios/documentation/General/Conceptual/iPadHIG/iPadHIG.pdf
Modified Ryan CY's version with storyboard.
Put this code to login controller.
1. Set storyboard id of UISplitViewController to SplitViewController;
2. Set UISplitViewController delegate and save instance
UISplitViewController* splitController = [self.storyboard instantiateViewControllerWithIdentifier:#"SplitViewController"];
UINavigationController* navigationController = [splitController.viewControllers lastObject];
splitController.delegate = (id)navigationController.topViewController;
3. Change rootViewController after login
self.view.window.rootViewController = splitController;