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IDMPhotoBrowser.m
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//
// IDMPhotoBrowser.m
// IDMPhotoBrowser
//
// Created by Michael Waterfall on 14/10/2010.
// Copyright 2010 d3i. All rights reserved.
//
#import <QuartzCore/QuartzCore.h>
#import "IDMPhotoBrowser.h"
#import "IDMZoomingScrollView.h"
#import "IDMUtils.h"
#import "pop/POP.h"
#ifndef IDMPhotoBrowserLocalizedStrings
#define IDMPhotoBrowserLocalizedStrings(key) \
NSLocalizedStringFromTableInBundle((key), nil, [NSBundle bundleWithPath:[[NSBundle bundleForClass: [IDMPhotoBrowser class]] pathForResource:@"IDMPBLocalizations" ofType:@"bundle"]], nil)
#endif
// Private
@interface IDMPhotoBrowser () {
// Data
NSMutableArray *_photos;
// Views
UIScrollView *_pagingScrollView;
// Gesture
UIPanGestureRecognizer *_panGesture;
// Paging
NSMutableSet *_visiblePages, *_recycledPages;
NSUInteger _pageIndexBeforeRotation;
NSUInteger _currentPageIndex;
// Buttons
UIButton *_doneButton;
// Toolbar
UIToolbar *_toolbar;
UIBarButtonItem *_previousButton, *_nextButton, *_actionButton;
UIBarButtonItem *_counterButton;
UILabel *_counterLabel;
// Actions
UIActionSheet *_actionsSheet;
UIActivityViewController *activityViewController;
// Control
NSTimer *_controlVisibilityTimer;
// Appearance
//UIStatusBarStyle _previousStatusBarStyle;
BOOL _statusBarOriginallyHidden;
// Present
UIView *_senderViewForAnimation;
// Misc
BOOL _performingLayout;
BOOL _rotating;
BOOL _viewIsActive; // active as in it's in the view heirarchy
BOOL _autoHide;
NSInteger _initalPageIndex;
CGFloat _statusBarHeight;
BOOL _isdraggingPhoto;
CGRect _senderViewOriginalFrame;
//UIImage *_backgroundScreenshot;
UIWindow *_applicationWindow;
// iOS 7
UIViewController *_applicationTopViewController;
int _previousModalPresentationStyle;
}
// Private Properties
@property (nonatomic, strong) UIActionSheet *actionsSheet;
@property (nonatomic, strong) UIActivityViewController *activityViewController;
// Private Methods
// Layout
- (void)performLayout;
// Paging
- (void)tilePages;
- (BOOL)isDisplayingPageForIndex:(NSUInteger)index;
- (IDMZoomingScrollView *)pageDisplayedAtIndex:(NSUInteger)index;
- (IDMZoomingScrollView *)pageDisplayingPhoto:(id<IDMPhoto>)photo;
- (IDMZoomingScrollView *)dequeueRecycledPage;
- (void)configurePage:(IDMZoomingScrollView *)page forIndex:(NSUInteger)index;
- (void)didStartViewingPageAtIndex:(NSUInteger)index;
// Frames
- (CGRect)frameForPagingScrollView;
- (CGRect)frameForPageAtIndex:(NSUInteger)index;
- (CGSize)contentSizeForPagingScrollView;
- (CGPoint)contentOffsetForPageAtIndex:(NSUInteger)index;
- (CGRect)frameForToolbarAtOrientation:(UIInterfaceOrientation)orientation;
- (CGRect)frameForDoneButtonAtOrientation:(UIInterfaceOrientation)orientation;
- (CGRect)frameForCaptionView:(IDMCaptionView *)captionView atIndex:(NSUInteger)index;
// Toolbar
- (void)updateToolbar;
// Navigation
- (void)jumpToPageAtIndex:(NSUInteger)index;
- (void)gotoPreviousPage;
- (void)gotoNextPage;
// Controls
- (void)cancelControlHiding;
- (void)hideControlsAfterDelay;
- (void)setControlsHidden:(BOOL)hidden animated:(BOOL)animated permanent:(BOOL)permanent;
//- (void)toggleControls;
- (BOOL)areControlsHidden;
// Interactions
- (void)handleSingleTap;
// Data
- (NSUInteger)numberOfPhotos;
- (id<IDMPhoto>)photoAtIndex:(NSUInteger)index;
- (UIImage *)imageForPhoto:(id<IDMPhoto>)photo;
- (void)loadAdjacentPhotosIfNecessary:(id<IDMPhoto>)photo;
- (void)releaseAllUnderlyingPhotos;
@end
// IDMPhotoBrowser
@implementation IDMPhotoBrowser
// Properties
@synthesize displayDoneButton = _displayDoneButton, displayToolbar = _displayToolbar, displayActionButton = _displayActionButton, displayCounterLabel = _displayCounterLabel, useWhiteBackgroundColor = _useWhiteBackgroundColor, doneButtonImage = _doneButtonImage;
@synthesize leftArrowImage = _leftArrowImage, rightArrowImage = _rightArrowImage, leftArrowSelectedImage = _leftArrowSelectedImage, rightArrowSelectedImage = _rightArrowSelectedImage, actionButtonImage = _actionButtonImage, actionButtonSelectedImage = _actionButtonSelectedImage;
@synthesize displayArrowButton = _displayArrowButton, actionButtonTitles = _actionButtonTitles;
@synthesize arrowButtonsChangePhotosAnimated = _arrowButtonsChangePhotosAnimated;
@synthesize forceHideStatusBar = _forceHideStatusBar;
@synthesize usePopAnimation = _usePopAnimation;
@synthesize disableVerticalSwipe = _disableVerticalSwipe;
@synthesize dismissOnTouch = _dismissOnTouch;
@synthesize actionsSheet = _actionsSheet, activityViewController = _activityViewController;
@synthesize trackTintColor = _trackTintColor, progressTintColor = _progressTintColor;
@synthesize delegate = _delegate;
#pragma mark - NSObject
- (id)init {
if ((self = [super init])) {
// Defaults
self.hidesBottomBarWhenPushed = YES;
_currentPageIndex = 0;
_performingLayout = NO; // Reset on view did appear
_rotating = NO;
_viewIsActive = NO;
_visiblePages = [NSMutableSet new];
_recycledPages = [NSMutableSet new];
_photos = [NSMutableArray new];
_initalPageIndex = 0;
_autoHide = YES;
_autoHideInterface = YES;
_displayDoneButton = YES;
_doneButtonImage = nil;
_displayToolbar = YES;
_displayActionButton = YES;
_displayArrowButton = YES;
_displayCounterLabel = NO;
_forceHideStatusBar = NO;
_usePopAnimation = NO;
_disableVerticalSwipe = NO;
_dismissOnTouch = NO;
_useWhiteBackgroundColor = NO;
_leftArrowImage = _rightArrowImage = _leftArrowSelectedImage = _rightArrowSelectedImage = nil;
_arrowButtonsChangePhotosAnimated = YES;
_backgroundScaleFactor = 1.0;
_animationDuration = 0.28;
_senderViewForAnimation = nil;
_scaleImage = nil;
_isdraggingPhoto = NO;
_statusBarHeight = 20.f;
_doneButtonRightInset = 20.f;
// relative to status bar and safeAreaInsets
_doneButtonTopInset = 10.f;
_doneButtonSize = CGSizeMake(55.f, 26.f);
if ([self respondsToSelector:@selector(automaticallyAdjustsScrollViewInsets)]) {
self.automaticallyAdjustsScrollViewInsets = NO;
}
_applicationWindow = [[[UIApplication sharedApplication] delegate] window];
self.modalPresentationStyle = UIModalPresentationCustom;
self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
self.modalPresentationCapturesStatusBarAppearance = YES;
self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
// Listen for IDMPhoto notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(handleIDMPhotoLoadingDidEndNotification:)
name:IDMPhoto_LOADING_DID_END_NOTIFICATION
object:nil];
}
return self;
}
- (id)initWithPhotos:(NSArray *)photosArray {
if ((self = [self init])) {
_photos = [[NSMutableArray alloc] initWithArray:photosArray];
}
return self;
}
- (id)initWithPhotos:(NSArray *)photosArray animatedFromView:(UIView*)view {
if ((self = [self init])) {
_photos = [[NSMutableArray alloc] initWithArray:photosArray];
_senderViewForAnimation = view;
}
return self;
}
- (id)initWithPhotoURLs:(NSArray *)photoURLsArray {
if ((self = [self init])) {
NSArray *photosArray = [IDMPhoto photosWithURLs:photoURLsArray];
_photos = [[NSMutableArray alloc] initWithArray:photosArray];
}
return self;
}
- (id)initWithPhotoURLs:(NSArray *)photoURLsArray animatedFromView:(UIView*)view {
if ((self = [self init])) {
NSArray *photosArray = [IDMPhoto photosWithURLs:photoURLsArray];
_photos = [[NSMutableArray alloc] initWithArray:photosArray];
_senderViewForAnimation = view;
}
return self;
}
- (void)dealloc {
_pagingScrollView.delegate = nil;
[[NSNotificationCenter defaultCenter] removeObserver:self];
[self releaseAllUnderlyingPhotos];
}
- (void)releaseAllUnderlyingPhotos {
for (id p in _photos) { if (p != [NSNull null]) [p unloadUnderlyingImage]; } // Release photos
}
- (void)didReceiveMemoryWarning {
// Release any cached data, images, etc that aren't in use.
[self releaseAllUnderlyingPhotos];
[_recycledPages removeAllObjects];
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
}
#pragma mark - Pan Gesture
- (void)panGestureRecognized:(id)sender {
// Initial Setup
IDMZoomingScrollView *scrollView = [self pageDisplayedAtIndex:_currentPageIndex];
//IDMTapDetectingImageView *scrollView.photoImageView = scrollView.photoImageView;
static float firstX, firstY;
float viewHeight = scrollView.frame.size.height;
float viewHalfHeight = viewHeight/2;
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
// Gesture Began
if ([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
[self setControlsHidden:YES animated:YES permanent:YES];
firstX = [scrollView center].x;
firstY = [scrollView center].y;
_senderViewForAnimation.hidden = (_currentPageIndex == _initalPageIndex);
_isdraggingPhoto = YES;
[self setNeedsStatusBarAppearanceUpdate];
}
translatedPoint = CGPointMake(firstX, firstY+translatedPoint.y);
[scrollView setCenter:translatedPoint];
float newY = scrollView.center.y - viewHalfHeight;
float newAlpha = 1 - fabsf(newY)/viewHeight; //abs(newY)/viewHeight * 1.8;
self.view.opaque = YES;
self.view.backgroundColor = [UIColor colorWithWhite:(_useWhiteBackgroundColor ? 1 : 0) alpha:newAlpha];
// Gesture Ended
if ([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
if(scrollView.center.y > viewHalfHeight+40 || scrollView.center.y < viewHalfHeight-40) // Automatic Dismiss View
{
if (_senderViewForAnimation && _currentPageIndex == _initalPageIndex) {
[self performCloseAnimationWithScrollView:scrollView];
return;
}
CGFloat finalX = firstX, finalY;
CGFloat windowsHeigt = [_applicationWindow frame].size.height;
if(scrollView.center.y > viewHalfHeight+30) // swipe down
finalY = windowsHeigt*2;
else // swipe up
finalY = -viewHalfHeight;
CGFloat animationDuration = 0.35;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:animationDuration];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDelegate:self];
[scrollView setCenter:CGPointMake(finalX, finalY)];
self.view.backgroundColor = [UIColor colorWithWhite:0 alpha:0];
[UIView commitAnimations];
[self performSelector:@selector(doneButtonPressed:) withObject:self afterDelay:animationDuration];
}
else // Continue Showing View
{
_isdraggingPhoto = NO;
[self setNeedsStatusBarAppearanceUpdate];
self.view.backgroundColor = [UIColor colorWithWhite:(_useWhiteBackgroundColor ? 1 : 0) alpha:1];
CGFloat velocityY = (.35*[(UIPanGestureRecognizer*)sender velocityInView:self.view].y);
CGFloat finalX = firstX;
CGFloat finalY = viewHalfHeight;
CGFloat animationDuration = (ABS(velocityY)*.0002)+.2;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:animationDuration];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
[UIView setAnimationDelegate:self];
[scrollView setCenter:CGPointMake(finalX, finalY)];
[UIView commitAnimations];
}
}
}
#pragma mark - Animation
- (void)performPresentAnimation {
self.view.alpha = 0.0f;
_pagingScrollView.alpha = 0.0f;
UIImage *imageFromView = _scaleImage ? _scaleImage : [self getImageFromView:_senderViewForAnimation];
_senderViewOriginalFrame = [_senderViewForAnimation.superview convertRect:_senderViewForAnimation.frame toView:nil];
UIView *fadeView = [[UIView alloc] initWithFrame:_applicationWindow.bounds];
fadeView.backgroundColor = [UIColor clearColor];
[_applicationWindow addSubview:fadeView];
UIImageView *resizableImageView = [[UIImageView alloc] initWithImage:imageFromView];
resizableImageView.frame = _senderViewOriginalFrame;
resizableImageView.clipsToBounds = YES;
resizableImageView.contentMode = _senderViewForAnimation ? _senderViewForAnimation.contentMode : UIViewContentModeScaleAspectFill;
resizableImageView.backgroundColor = [UIColor clearColor];
if (@available(iOS 11.0, *)) {
resizableImageView.accessibilityIgnoresInvertColors = YES;
} else {
// Fallback on earlier versions
}
[_applicationWindow addSubview:resizableImageView];
_senderViewForAnimation.hidden = YES;
void (^completion)() = ^() {
self.view.alpha = 1.0f;
_pagingScrollView.alpha = 1.0f;
resizableImageView.backgroundColor = [UIColor colorWithWhite:(_useWhiteBackgroundColor) ? 1 : 0 alpha:1];
[fadeView removeFromSuperview];
[resizableImageView removeFromSuperview];
};
[UIView animateWithDuration:_animationDuration animations:^{
fadeView.backgroundColor = self.useWhiteBackgroundColor ? [UIColor whiteColor] : [UIColor blackColor];
} completion:nil];
CGRect finalImageViewFrame = [self animationFrameForImage:imageFromView presenting:YES scrollView:nil];
if(_usePopAnimation)
{
[self animateView:resizableImageView
toFrame:finalImageViewFrame
completion:completion];
}
else
{
[UIView animateWithDuration:_animationDuration animations:^{
resizableImageView.layer.frame = finalImageViewFrame;
} completion:^(BOOL finished) {
completion();
}];
}
}
- (void)performCloseAnimationWithScrollView:(IDMZoomingScrollView*)scrollView {
if ([_delegate respondsToSelector:@selector(willDisappearPhotoBrowser:)]) {
[_delegate willDisappearPhotoBrowser:self];
}
float fadeAlpha = 1 - fabs(scrollView.frame.origin.y)/scrollView.frame.size.height;
UIImage *imageFromView = [scrollView.photo underlyingImage];
if (!imageFromView && [scrollView.photo respondsToSelector:@selector(placeholderImage)]) {
imageFromView = [scrollView.photo placeholderImage];
}
UIView *fadeView = [[UIView alloc] initWithFrame:_applicationWindow.bounds];
fadeView.backgroundColor = self.useWhiteBackgroundColor ? [UIColor whiteColor] : [UIColor blackColor];
fadeView.alpha = fadeAlpha;
[_applicationWindow addSubview:fadeView];
CGRect imageViewFrame = [self animationFrameForImage:imageFromView presenting:NO scrollView:scrollView];
UIImageView *resizableImageView = [[UIImageView alloc] initWithImage:imageFromView];
resizableImageView.frame = imageViewFrame;
resizableImageView.contentMode = _senderViewForAnimation ? _senderViewForAnimation.contentMode : UIViewContentModeScaleAspectFill;
resizableImageView.backgroundColor = [UIColor clearColor];
resizableImageView.clipsToBounds = YES;
if (@available(iOS 11.0, *)) {
resizableImageView.accessibilityIgnoresInvertColors = YES;
} else {
// Fallback on earlier versions
}
[_applicationWindow addSubview:resizableImageView];
self.view.hidden = YES;
void (^completion)() = ^() {
_senderViewForAnimation.hidden = NO;
_senderViewForAnimation = nil;
_scaleImage = nil;
[fadeView removeFromSuperview];
[resizableImageView removeFromSuperview];
[self prepareForClosePhotoBrowser];
[self dismissPhotoBrowserAnimated:NO];
};
[UIView animateWithDuration:_animationDuration animations:^{
fadeView.alpha = 0;
self.view.backgroundColor = [UIColor clearColor];
} completion:nil];
CGRect senderViewOriginalFrame = _senderViewForAnimation.superview ? [_senderViewForAnimation.superview convertRect:_senderViewForAnimation.frame toView:nil] : _senderViewOriginalFrame;
if(_usePopAnimation)
{
[self animateView:resizableImageView
toFrame:senderViewOriginalFrame
completion:completion];
}
else
{
[UIView animateWithDuration:_animationDuration animations:^{
resizableImageView.layer.frame = senderViewOriginalFrame;
} completion:^(BOOL finished) {
completion();
}];
}
}
- (CGRect)animationFrameForImage:(UIImage *)image presenting:(BOOL)presenting scrollView:(UIScrollView *)scrollView
{
if (!image) {
return CGRectZero;
}
CGSize imageSize = image.size;
CGRect bounds = _applicationWindow.bounds;
// adjust bounds as the photo browser does
if (@available(iOS 11.0, *)) {
// use the windows safe area inset
UIWindow *window = [UIApplication sharedApplication].keyWindow;
UIEdgeInsets insets = UIEdgeInsetsMake(_statusBarHeight, 0, 0, 0);
if (window != NULL) {
insets = window.safeAreaInsets;
}
bounds = [self adjustForSafeArea:bounds adjustForStatusBar:NO forInsets:insets];
}
CGFloat maxWidth = CGRectGetWidth(bounds);
CGFloat maxHeight = CGRectGetHeight(bounds);
CGRect animationFrame = CGRectZero;
CGFloat aspect = imageSize.width / imageSize.height;
if (maxWidth / aspect <= maxHeight) {
animationFrame.size = CGSizeMake(maxWidth, maxWidth / aspect);
}
else {
animationFrame.size = CGSizeMake(maxHeight * aspect, maxHeight);
}
animationFrame.origin.x = roundf((maxWidth - animationFrame.size.width) / 2.0f);
animationFrame.origin.y = roundf((maxHeight - animationFrame.size.height) / 2.0f);
if (!presenting) {
animationFrame.origin.y += scrollView.frame.origin.y;
}
return animationFrame;
}
#pragma mark - Genaral
- (void)prepareForClosePhotoBrowser {
// Gesture
[_applicationWindow removeGestureRecognizer:_panGesture];
_autoHide = NO;
// Controls
[NSObject cancelPreviousPerformRequestsWithTarget:self]; // Cancel any pending toggles from taps
}
- (void)dismissPhotoBrowserAnimated:(BOOL)animated {
self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
if ([_delegate respondsToSelector:@selector(photoBrowser:willDismissAtPageIndex:)])
[_delegate photoBrowser:self willDismissAtPageIndex:_currentPageIndex];
[self dismissViewControllerAnimated:animated completion:^{
if ([_delegate respondsToSelector:@selector(photoBrowser:didDismissAtPageIndex:)])
[_delegate photoBrowser:self didDismissAtPageIndex:_currentPageIndex];
// if (SYSTEM_VERSION_LESS_THAN(@"8.0"))
// {
// _applicationTopViewController.modalPresentationStyle = _previousModalPresentationStyle;
// }
}];
}
- (UIButton*)customToolbarButtonImage:(UIImage*)image imageSelected:(UIImage*)selectedImage action:(SEL)action {
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:image forState:UIControlStateNormal];
[button setImage:selectedImage forState:UIControlStateDisabled];
[button addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];
[button setContentMode:UIViewContentModeCenter];
[button setFrame:[self getToolbarButtonFrame:image]];
return button;
}
- (CGRect)getToolbarButtonFrame:(UIImage *)image{
BOOL const isRetinaHd = ((float)[[UIScreen mainScreen] scale] > 2.0f);
float const defaultButtonSize = isRetinaHd ? 66.0f : 44.0f;
CGFloat buttonWidth = (image.size.width > defaultButtonSize) ? image.size.width : defaultButtonSize;
CGFloat buttonHeight = (image.size.height > defaultButtonSize) ? image.size.width : defaultButtonSize;
return CGRectMake(0,0, buttonWidth, buttonHeight);
}
- (UIImage*)getImageFromView:(UIView *)view {
UIGraphicsBeginImageContextWithOptions(view.bounds.size, YES, 2);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
- (UIViewController *)topviewController
{
UIViewController *topviewController = [UIApplication sharedApplication].keyWindow.rootViewController;
while (topviewController.presentedViewController) {
topviewController = topviewController.presentedViewController;
}
return topviewController;
}
#pragma mark - View Lifecycle
- (void)viewDidLoad {
// View
self.view.backgroundColor = [UIColor colorWithWhite:(_useWhiteBackgroundColor ? 1 : 0) alpha:1];
self.view.clipsToBounds = YES;
// Setup paging scrolling view
CGRect pagingScrollViewFrame = [self frameForPagingScrollView];
_pagingScrollView = [[UIScrollView alloc] initWithFrame:pagingScrollViewFrame];
//_pagingScrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
_pagingScrollView.pagingEnabled = YES;
_pagingScrollView.delegate = self;
_pagingScrollView.showsHorizontalScrollIndicator = NO;
_pagingScrollView.showsVerticalScrollIndicator = NO;
_pagingScrollView.backgroundColor = [UIColor clearColor];
_pagingScrollView.contentSize = [self contentSizeForPagingScrollView];
[self.view addSubview:_pagingScrollView];
// Transition animation
[self performPresentAnimation];
UIInterfaceOrientation currentOrientation = [UIApplication sharedApplication].statusBarOrientation;
// Toolbar
_toolbar = [[UIToolbar alloc] initWithFrame:[self frameForToolbarAtOrientation:currentOrientation]];
_toolbar.backgroundColor = [UIColor clearColor];
_toolbar.clipsToBounds = YES;
_toolbar.translucent = YES;
[_toolbar setBackgroundImage:[UIImage new]
forToolbarPosition:UIToolbarPositionAny
barMetrics:UIBarMetricsDefault];
// Close Button
_doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
[_doneButton setFrame:[self frameForDoneButtonAtOrientation:currentOrientation]];
[_doneButton setAlpha:1.0f];
[_doneButton addTarget:self action:@selector(doneButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
if(!_doneButtonImage) {
[_doneButton setTitleColor:[UIColor colorWithWhite:0.9 alpha:0.9] forState:UIControlStateNormal|UIControlStateHighlighted];
[_doneButton setTitle:IDMPhotoBrowserLocalizedStrings(@"Done") forState:UIControlStateNormal];
[_doneButton.titleLabel setFont:[UIFont boldSystemFontOfSize:11.0f]];
[_doneButton setBackgroundColor:[UIColor colorWithWhite:0.1 alpha:0.5]];
_doneButton.layer.cornerRadius = 3.0f;
_doneButton.layer.borderColor = [UIColor colorWithWhite:0.9 alpha:0.9].CGColor;
_doneButton.layer.borderWidth = 1.0f;
_doneButtonSize = _doneButton.frame.size;
}
else {
[_doneButton setImage:_doneButtonImage forState:UIControlStateNormal];
_doneButton.contentMode = UIViewContentModeScaleAspectFit;
}
UIImage *leftButtonImage = (_leftArrowImage == nil) ?
[UIImage imageNamed:@"IDMPhotoBrowser.bundle/images/IDMPhotoBrowser_arrowLeft.png"] : _leftArrowImage;
UIImage *rightButtonImage = (_rightArrowImage == nil) ?
[UIImage imageNamed:@"IDMPhotoBrowser.bundle/images/IDMPhotoBrowser_arrowRight.png"] : _rightArrowImage;
UIImage *leftButtonSelectedImage = (_leftArrowSelectedImage == nil) ?
[UIImage imageNamed:@"IDMPhotoBrowser.bundle/images/IDMPhotoBrowser_arrowLeftSelected.png"] : _leftArrowSelectedImage;
UIImage *rightButtonSelectedImage = (_rightArrowSelectedImage == nil) ?
[UIImage imageNamed:@"IDMPhotoBrowser.bundle/images/IDMPhotoBrowser_arrowRightSelected.png"] : _rightArrowSelectedImage;
// Arrows
_previousButton = [[UIBarButtonItem alloc] initWithCustomView:[self customToolbarButtonImage:leftButtonImage
imageSelected:leftButtonSelectedImage
action:@selector(gotoPreviousPage)]];
_nextButton = [[UIBarButtonItem alloc] initWithCustomView:[self customToolbarButtonImage:rightButtonImage
imageSelected:rightButtonSelectedImage
action:@selector(gotoNextPage)]];
// Counter Label
_counterLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 95, 40)];
_counterLabel.textAlignment = NSTextAlignmentCenter;
_counterLabel.backgroundColor = [UIColor clearColor];
_counterLabel.font = [UIFont fontWithName:@"Helvetica" size:17];
if(_useWhiteBackgroundColor == NO) {
_counterLabel.textColor = [UIColor whiteColor];
_counterLabel.shadowColor = [UIColor darkTextColor];
_counterLabel.shadowOffset = CGSizeMake(0, 1);
}
else {
_counterLabel.textColor = [UIColor blackColor];
}
// Counter Button
_counterButton = [[UIBarButtonItem alloc] initWithCustomView:_counterLabel];
// Action Button
if(_actionButtonImage != nil && _actionButtonSelectedImage != nil) {
_actionButton = [[UIBarButtonItem alloc] initWithCustomView:[self customToolbarButtonImage:_actionButtonImage
imageSelected:_actionButtonSelectedImage
action:@selector(actionButtonPressed:)]];
}
else {
_actionButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction
target:self
action:@selector(actionButtonPressed:)];
}
// Gesture
_panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureRecognized:)];
[_panGesture setMinimumNumberOfTouches:1];
[_panGesture setMaximumNumberOfTouches:1];
// Update
//[self reloadData];
// Super
[super viewDidLoad];
}
- (void)viewWillAppear:(BOOL)animated {
// Update
[self reloadData];
if ([_delegate respondsToSelector:@selector(willAppearPhotoBrowser:)]) {
[_delegate willAppearPhotoBrowser:self];
}
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(playerDidFinishPlaying:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:NULL];
// Super
[super viewWillAppear:animated];
// Status Bar
_statusBarOriginallyHidden = [UIApplication sharedApplication].statusBarHidden;
// Update UI
[self hideControlsAfterDelay];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
_viewIsActive = YES;
}
- (void)viewWillDisappear:(BOOL)animated {
[[NSNotificationCenter defaultCenter] removeObserver:self
name:AVPlayerItemDidPlayToEndTimeNotification
object:NULL];
// Super
[super viewWillDisappear:animated];
}
// Release any retained subviews of the main view.
- (void)viewDidUnload {
_currentPageIndex = 0;
_pagingScrollView = nil;
_visiblePages = nil;
_recycledPages = nil;
_toolbar = nil;
_doneButton = nil;
_previousButton = nil;
_nextButton = nil;
[super viewDidUnload];
}
#pragma mark - Video Loop
- (void)playerDidFinishPlaying:(NSNotification *)notification {
[[self pageDisplayedAtIndex:_currentPageIndex].videoPlayerLayer.player seekToTime:kCMTimeZero];
[[self pageDisplayedAtIndex:_currentPageIndex].videoPlayerLayer.player play];
}
#pragma mark - Status Bar
- (UIStatusBarStyle)preferredStatusBarStyle {
return _useWhiteBackgroundColor ? UIStatusBarStyleDefault : UIStatusBarStyleLightContent;
}
- (BOOL)prefersStatusBarHidden {
if(_forceHideStatusBar) {
return YES;
}
if(_isdraggingPhoto) {
if(_statusBarOriginallyHidden) {
return YES;
}
else {
return NO;
}
}
else {
return [self areControlsHidden];
}
}
- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation {
return UIStatusBarAnimationFade;
}
#pragma mark - Layout
- (void)viewWillLayoutSubviews {
// Flag
_performingLayout = YES;
UIInterfaceOrientation currentOrientation = [UIApplication sharedApplication].statusBarOrientation;
// Toolbar
_toolbar.frame = [self frameForToolbarAtOrientation:currentOrientation];
// Done button
_doneButton.frame = [self frameForDoneButtonAtOrientation:currentOrientation];
// Remember index
NSUInteger indexPriorToLayout = _currentPageIndex;
// Get paging scroll view frame to determine if anything needs changing
CGRect pagingScrollViewFrame = [self frameForPagingScrollView];
// Frame needs changing
_pagingScrollView.frame = pagingScrollViewFrame;
// Recalculate contentSize based on current orientation
_pagingScrollView.contentSize = [self contentSizeForPagingScrollView];
// Adjust frames and configuration of each visible page
for (IDMZoomingScrollView *page in _visiblePages) {
NSUInteger index = PAGE_INDEX(page);
page.frame = [self frameForPageAtIndex:index];
page.captionView.frame = [self frameForCaptionView:page.captionView atIndex:index];
[page setMaxMinZoomScalesForCurrentBounds];
}
// Adjust contentOffset to preserve page location based on values collected prior to location
_pagingScrollView.contentOffset = [self contentOffsetForPageAtIndex:indexPriorToLayout];
[self didStartViewingPageAtIndex:_currentPageIndex]; // initial
// Reset
_currentPageIndex = indexPriorToLayout;
_performingLayout = NO;
// Super
[super viewWillLayoutSubviews];
}
- (void)performLayout {
// Setup
_performingLayout = YES;
NSUInteger numberOfPhotos = [self numberOfPhotos];
// Setup pages
[_visiblePages removeAllObjects];
[_recycledPages removeAllObjects];
// Toolbar
if (_displayToolbar) {
[self.view addSubview:_toolbar];
} else {
[_toolbar removeFromSuperview];
}
// Close button
if(_displayDoneButton && !self.navigationController.navigationBar)
[self.view addSubview:_doneButton];
// Toolbar items & navigation
UIBarButtonItem *fixedLeftSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
target:self action:nil];
fixedLeftSpace.width = 32; // To balance action button
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:self action:nil];
NSMutableArray *items = [NSMutableArray new];
if (_displayActionButton)
[items addObject:fixedLeftSpace];
[items addObject:flexSpace];
if (numberOfPhotos > 1 && _displayArrowButton)
[items addObject:_previousButton];
if(_displayCounterLabel) {
[items addObject:flexSpace];
[items addObject:_counterButton];
}
[items addObject:flexSpace];
if (numberOfPhotos > 1 && _displayArrowButton)
[items addObject:_nextButton];
[items addObject:flexSpace];
if(_displayActionButton)
[items addObject:_actionButton];
[_toolbar setItems:items];
[self updateToolbar];
// Content offset
_pagingScrollView.contentOffset = [self contentOffsetForPageAtIndex:_currentPageIndex];
[self tilePages];
_performingLayout = NO;
if(! _disableVerticalSwipe) {
[self.view addGestureRecognizer:_panGesture];
}
}
#pragma mark - Data
- (void)reloadData {
// Get data
[self releaseAllUnderlyingPhotos];
// Update
[self performLayout];
// Layout
[self.view setNeedsLayout];
}
- (NSUInteger)numberOfPhotos {
return _photos.count;
}
- (id<IDMPhoto>)photoAtIndex:(NSUInteger)index {
return _photos[index];
}
- (IDMCaptionView *)captionViewForPhotoAtIndex:(NSUInteger)index {
IDMCaptionView *captionView = nil;
if ([_delegate respondsToSelector:@selector(photoBrowser:captionViewForPhotoAtIndex:)]) {
captionView = [_delegate photoBrowser:self captionViewForPhotoAtIndex:index];
} else {
id <IDMPhoto> photo = [self photoAtIndex:index];
if ([photo respondsToSelector:@selector(caption)]) {
if ([photo caption]) captionView = [[IDMCaptionView alloc] initWithPhoto:photo];
}
}
captionView.alpha = [self areControlsHidden] ? 0 : 1; // Initial alpha
return captionView;
}
- (UIImage *)imageForPhoto:(id<IDMPhoto>)photo {
if (photo) {
// Get image or obtain in background
if ([photo underlyingImage]) {
return [photo underlyingImage];
} else {
[photo loadUnderlyingImageAndNotify];
if ([photo respondsToSelector:@selector(placeholderImage)]) {
return [photo placeholderImage];
}
}
}
return nil;
}
- (void)loadAdjacentPhotosIfNecessary:(id<IDMPhoto>)photo {
IDMZoomingScrollView *page = [self pageDisplayingPhoto:photo];
if (page) {
// If page is current page then initiate loading of previous and next pages
NSUInteger pageIndex = PAGE_INDEX(page);
if (_currentPageIndex == pageIndex) {
if (pageIndex > 0) {
// Preload index - 1
id <IDMPhoto> photo = [self photoAtIndex:pageIndex-1];
if (![photo underlyingImage]) {
[photo loadUnderlyingImageAndNotify];
IDMLog(@"Pre-loading image at index %i", pageIndex-1);
}
}
if (pageIndex < [self numberOfPhotos] - 1) {
// Preload index + 1
id <IDMPhoto> photo = [self photoAtIndex:pageIndex+1];
if (![photo underlyingImage]) {
[photo loadUnderlyingImageAndNotify];
IDMLog(@"Pre-loading image at index %i", pageIndex+1);
}
}
}
}
}
#pragma mark - IDMPhoto Loading Notification
- (void)handleIDMPhotoLoadingDidEndNotification:(NSNotification *)notification {
id <IDMPhoto> photo = [notification object];
IDMZoomingScrollView *page = [self pageDisplayingPhoto:photo];
if (page) {
if ([photo underlyingImage]) {
// Successful load
[page displayImage];
[self loadAdjacentPhotosIfNecessary:photo];
} else {
// Failed to load
[page displayImageFailure];
if ([_delegate respondsToSelector:@selector(photoBrowser:imageFailed:imageView:)]) {
NSUInteger pageIndex = PAGE_INDEX(page);
[_delegate photoBrowser:self imageFailed:pageIndex imageView:page.photoImageView];