I have a segment controller on one of my views and now on the 0th index of segment controller I want to add UIImagePickerController (for showing camera view to user) by adding as sub view and not by ModalViewController. Right now the view gets loaded but It does not show any camera view. I am able to show the camera view by presentModalViewController and passing its object.
Here's the code--
if(segmentedControl.selectedSegmentIndex==0)
{
UIImagePickerController *cameraView = [[UIImagePickerController alloc] init];
cameraView.sourceType = UIImagePickerControllerSourceTypeCamera;
cameraView.showsCameraControls = NO;
//[self presentModalViewController:cameraView animated:YES]; //Working
[self.view addSubview:cameraView.view]; // Not Working
}
[self.view addSubview:picker.view];
[picker viewWillAppear:YES]; // trickery to make it show
[picker viewDidAppear:YES];
You get a white bar at the top as side effect since UIImagePickerController is not intended to be used with it.
You should avoid doing this, it is not recommended and could lead to unwanted side effects.
As stated on the documentation (https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIImagePickerController_Class) you cannot add it as a subview, you should present it as a new controller
Here a piece of the doc:
On iPhone or iPod touch, do this modally (full-screen) by calling the
presentViewController:animated:completion: method of the currently
active view controller, passing your configured image picker
controller as the new view controller.
Hope this helpes!
Related
I'm making an application that uses the iphone camera to detect the changing brightness of the video stream. The video feed should be mid-way through a trail of views under the navigation controller. On pressing a button on this view, the user should see a view that displays the average brightness of the video stream.
I am having quite a lot of trouble getting the UIImagePicker to display in the right way. I've found that it is not possible to output it to a nested UIView - instead, the overlay for the camera should be set to display any extra functionality. I need this overlay to be part of my navigation controller.
I have the following code inside LuxMeterController:
- (void)viewDidLoad
{
[super viewDidLoad];
if (self.tst != YES) {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.showsCameraControls = NO;
picker.navigationBarHidden = YES;
UIStoryboard* sb = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
LuxMeterController* vc = [sb instantiateViewControllerWithIdentifier:#"cameraVc"];
vc.tst = YES;
picker.cameraOverlayView = vc.view;
[self presentModalViewController:picker animated:NO];
}
}
So first, the view is loaded - it initializes the camera and displays it as a modal view. The overlay of the camera is set to a second instance of LuxViewController - this one doesn't render a new camera as tst == YES.
This sort of seems to work - I have a video feed with a full-screen view as its overlay.
My problem is that as the overlay is not part of the hierarchy in the storyboard, it doesn't have UI elements (titlebar, back button,etc) that come from the navigation controller.
How do I get the overlay to sit inside the navigation controller? Or is this the wrong approach to take? How can I get a videostream to sit inside the navigation controller hierarchy, and to have overlay buttons that can move to a view further down the hierarchy?
I've only been doing objective-c and iphone development for a very short period of time, so I might be missing something obvious. If there is a better approach, I'd like to know about it.
I am new to Iphone development. I am working on an application which involves two views. I have a camera button in view one which opens up the default Iphone camera. This is achieved by having this code in the IBAction for camera button in ViewOneController:
UIImagePickerController *picker =
[[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = NO;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:picker animated:YES];
[picker release];
The view controller for the first view is also the UIImagePickerControllerDelegate for the camera. When the picture is clicked and the camera view returns to the function imagePickerController:didFinishPickingWithMediaInfo where I do this:
(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
[picker dismissModalViewControllerAnimated:YES];
[self presentModalViewController:ViewTwoViewController animated:YES];
}
So basically all I am trying to achieve is from viewone click "take picture" ---> Open camera --> after camera is done jump to view two. Quite simmilar to what it is in the flickr app. However after I take the picture from camera my app returns to view one and view two is not shown. What am I missing here?
Also from a conceptual perspective I guess IOS keeps a stack of views for any app. When presentModalViewController is called the view is shown and it is added to the stack and when dismissModalViewController is called the view is removed from the stack and the parent view is show. Is that right?
Thanks.
You probably need to put the call to [self presentModalViewController:ViewTwoViewController animated:YES] in viewWillAppear which will be called after the picker view has been removed.
You probably also need to surround the call with some check to only present viewTwo when applicable.
I added a modalView to my App, everything working fine, but on closing the modal, the whole modalView jumps about 1-2 centimeters to left while it disappears.
I did not find any reason for it yet, so here is the code regarding modal:
AppController:
- (void) showNameModal:(Player *)player
{
namesModal = [[PlayerModalView alloc] init];
namesModal.delegate = self;
namesModal.player = player;
UINavigationController *navCon = [[UINavigationController alloc] initWithRootViewController:namesModal];
navCon.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:navCon animated:YES];
[navCon release];
[namesModal release];
}
- (void)didDismissModalView
{
[self dismissModalViewControllerAnimated:YES];
}
ModalView:
- (void)dismissView:(id)sender
{
[delegate didDismissModalView];
}
called via navigation buttons as well ass via keyboard by
[self dismissView:nil];
As you can see, there is nothing special in it, could be taken from a manual actually.
What happens in detail:
Modal appears in center of screen, slides in from the bottom. centered all time.
i can handle some actions in the modalView, it stays centered.
now, dismissing the view makes it jumping to the left, than slides out.
Since it's a forced landscape-right app (currently), I was only able to notify the left-jump.
Any ideas how to get this jumping away?
Thanks
Try this,
- (void)didmissView:(id)sender
{
[self.navigationController didmissModelViewControllerAnimated:YES];
}
You are not modally presenting an instance of PlayerModalView but rather a UINavigationController. The left jerk you see is most likely the default animation of the navigation controller attempting a slide transform to the (non-existant) previous view.
It doesn't sound like you need a navigation controller for the PlayerModalView. Instead, you should create an ordinary view controller for it.
This solution seems to work well: Modal View Controller with keyboard on landscape iPad changes location when dismissed
To simplify resigning the first responder (if finding it is difficult), you can just call
[self.view endEditing:YES];
[self dismissModalViewControllerAnimated:YES];
The problem is that the UIViewController you're showing modally doesn't allow the orientation you're presenting it in, so when it disappears, it will do that in a direction that it considers "allowed".
Add this to the UIViewController for you modal view:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
I have a dilema, I want to present to the user a semi-transparent view.
I found out by experimenting that if I simply pushed the transparent view to the top of my NavigationController's stack, that it would not render the transparency level I wanted. So I decided to simply add the view as a subview of the current view at the top of the stack.
This solution works, the view below is still visible, and the View is 'semi-modal'. The problem is, if the parent view inherits from UITableViewController (as mine does), then the view I 'push' onto it, does not cover the navigation bar at the top.
I really don't want to get into a situation where I am forced to enable / disable controls on the navigation bar every time I push this view, so I was wondering, if anyone knew of any solutions that I could use so that the view I push onto the UITableViewController will actually 'push over' the navigation bar?
Funny, I was just doing the same thing yesterday. Unfortunately it seems to be impossible. Once the modal view controller is in place, the previous view becomes hidden.
See this previous question on the topic.
You can still use the view controller and NIB files you have set up - here's my sample code
- (void)showUpgrade {
[self.upgradeVC viewWillAppear:NO];
[self.view addSubview:self.upgradeVC.view];
[self.upgradeVC viewDidAppear:NO];
}
- (void)hideUpgrade {
[self.upgradeVC viewWillDisappear:NO];
[self.upgradeVC.view removeFromSuperview];
[self.upgradeVC viewDidDisappear:NO];
}
- (UpgradeViewController *)upgradeVC {
if (_upgradeVC == nil) {
_upgradeVC = [[UpgradeViewController alloc] initWithNibName:[NSString stringWithFormat:#"UpgradeView_%#", self.deviceType] bundle:nil];
_upgradeVC.delegate = self;
}
return _upgradeVC;
}
You will need to store a reference to the parent view controller in the modal view controller so that you can access the -hide method. I did this through a delegate.
It would also be easy to add some animation to -show and -hide if you want it to animate up from the bottom of the screen - I was just too lazy to do this.
iOS 8 added the UIModalPresentationOverFullScreen presentation style. Set this as the presented view controller’s modalPresentationStyle. For more advanced needs, look into creating a custom presentation controller.
There is now a way to achieve this using iOS7 custom transitions :
MyController * controller = [MyController new];
[controller setTransitioningDelegate:self.transitionController];
controller.modalPresentationStyle = UIModalPresentationCustom;
[self controller animated:YES completion:nil];
To create your custom transition, you need 2 things :
A TransitionDelegate object (implementing
<UIViewControllerTransitionDelegate>)
An "AnimatedTransitioning" object
(implementing <UIViewControllerAnimatedTransitioning>)
You can find more informations on custom transitions in this tutorial : http://www.doubleencore.com/2013/09/ios-7-custom-transitions/
Try this:
ViewController *vc = [[ViewController alloc] init];
[vc setModalPresentationStyle:UIModalPresentationOverCurrentContext];
[self presentViewController:vc animated:YES completion:nil];
Have you tried looping over the Modal View Controller's subviews and setting the background color to clear for every view? This is a DFS recursive function.
- (void)setBackgroundToClearForView:(UIView *)view {
if ([view subviews]) {
for (UIView *subView in [view subviews]) {
[self setBackgroundToClearForView:subView];
}
}
if ([view respondsToSelector:#selector(setBackgroundColor:)]) {
[view performSelector:#selector(setBackgroundColor:)
withObject:[UIColor clearColor]];
}
}
To use it call:
[self setBackgroundToClearForView:self.view];
in viewDidLoad.
This will do the trick.. Try this one.
// for clear color or you can easily adjust the alpha here
YourVC *vc=[[YourVC alloc]initWithNibName:#"YourVC" bundle:nil] ;
vc.view.backgroundColor = [UIColor clearColor];
self.modalPresentationStyle = UIModalPresentationCurrentContext;
[self presentViewController:vc animated:NO completion:nil];
So that the view will be full screen unlike UIModalPresentationFormSheet..
I am using TabBarController in my application. In one of the view of the tabbar I am using a UIImagePickerController to pick an image.
When I add the picker as follows
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.editing = YES;
[self presentModalViewController:imagePicker animated:YES];
[imagePicker release];
It adds the picker, But at the time of choosing the photo, The bottom bar having the buttons "choose" and "cancel" gets hide under my tabbar. How to resolve this .
The problem is that you are using self as the navigation controller that shows the modal screen. Therefore the tab bar navigation controller does not know that a modal screen should fill the whole screen. Since the UIImagePickerController can not adjust itself to a smaller size you have to use the tab bar navigation controller to open present the modal view.
I use the following code to show a UIImagePickerController from a navigation controller that is shown inside a tabbar:
[self.navigationController presentModalViewController:picker animated:YES];
using self.navigationController instead of self as the object that presents the UIImagePickerController did the trick for me.
This works for me:
picker.delegate = currentClassViewController;
[tabBarController presentModalViewController:picker animated:YES];
Have your picker-caller class own or have access to your UITabController variable and presentModalViewController against your tabBarController.
I haven't seen this problem - I have an app that uses a UITabBar and a UIImagePickerController together, and the tab bar does not obscure the image picker.
Inside my view controller, which is one of the UITabBar's view controllers, I'm creating the image picker as such:
self.imagePicker = [[[UIImagePickerController alloc] init] autorelease];
imagePicker.allowsImageEditing = NO;
imagePicker.delegate = self;
[self presentModalViewController:imagePicker animated:YES];
Seems very similar to your code, except that I'm setting the image picker as a retained property. Is your tab bar set up correctly? Is the view controller contained within the myTabBar.viewControllers array?