/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 The second view controller for the Custom Presentation demo.

 */

#import "AAPLCustomPresentationSecondViewController.h"

//  NOTE: The third view controller is presented with a modalPresentationStyle

//        of UIModalPresentationOverFullScreen, rather than the default

//        UIModalPresentationFullScreen (configured in the storyboard).

//

//        When a fullscreen view controller is presented (the corresponding

//        presentation controller's -shouldRemovePresentersView returns YES),

//        the presentation controller temporarily relocates the

//        presenting view controller's view to the presentation controller's

//        containerView.  When the fullscreen view controller is dismissed,

//        the presentation controller places the presenting view controller's

//        view back in its previous superview.

//

//        The relocation of the presenting view controller's view poses a

//        problem in this example because only the presenting view controller's

//        view is relocated, not the intermediate view hierarchy we setup

//        to apply the rounded corner and shadow effect.  If you modify the

//        modalPresentationStyle of Third View Controller in the storyboard,

//        you may notice that during the presentation and dismissal animation

//        for Third View Controller, the rounded corner and shadow effect is

//        lost.

//

//        The workaround is to use the UIModalPresentationOverFullScreen

//        presentation style.  This presentation style is similar to

//        UIModalPresentationFullScreen but the presentation controller for

//        this presentation style overrides -shouldRemovePresentersView to

//        return NO, avoiding the above problem.

@interface AAPLCustomPresentationSecondViewController ()

@property (nonatomic, weak) IBOutlet UISlider *slider;

@end

@implementation AAPLCustomPresentationSecondViewController

//| ----------------------------------------------------------------------------

- (void)viewDidLoad

{

    [super viewDidLoad];

    [self updatePreferredContentSizeWithTraitCollection:self.traitCollection];

    // NOTE: View controllers presented with custom presentation controllers

    //       do not assume control of the status bar appearance by default

    //       (their -preferredStatusBarStyle and -prefersStatusBarHidden

    //       methods are not called).  You can override this behavior by

    //       setting the value of the presented view controller's

    //       modalPresentationCapturesStatusBarAppearance property to YES.

    /* self.modalPresentationCapturesStatusBarAppearance = YES; */

}

//| ----------------------------------------------------------------------------

- (void)willTransitionToTraitCollection:(UITraitCollection *)newCollection withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator

{

    [super willTransitionToTraitCollection:newCollection withTransitionCoordinator:coordinator];

    // When the current trait collection changes (e.g. the device rotates),

    // update the preferredContentSize.

    [self updatePreferredContentSizeWithTraitCollection:newCollection];

}

//| ----------------------------------------------------------------------------

//! Updates the receiver's preferredContentSize based on the verticalSizeClass

//! of the provided \a traitCollection.

//

- (void)updatePreferredContentSizeWithTraitCollection:(UITraitCollection *)traitCollection

{

    self.preferredContentSize = CGSizeMake(self.view.bounds.size.width, traitCollection.verticalSizeClass == UIUserInterfaceSizeClassCompact ? 270 : 420);

    // To demonstrate how a presentation controller can dynamically respond

    // to changes to its presented view controller's preferredContentSize,

    // this view controller exposes a slider.  Dragging this slider updates

    // the preferredContentSize of this view controller in real time.

    //

    // Update the slider with appropriate min/max values and reset the

    // current value to reflect the changed preferredContentSize.

    self.slider.maximumValue = self.preferredContentSize.height;

    self.slider.minimumValue = 220.f;

    self.slider.value = self.slider.maximumValue;

}

//| ----------------------------------------------------------------------------

- (IBAction)sliderValueChange:(UISlider*)sender

{

    self.preferredContentSize = CGSizeMake(self.view.bounds.size.width, sender.value);

}

#pragma mark -

#pragma mark Unwind Actions

//| ----------------------------------------------------------------------------

//! Action for unwinding from the presented view controller (C).

//

- (IBAction)unwindToCustomPresentationSecondViewController:(UIStoryboardSegue *)sender

{ }

@end