iCarouselExampleViewController.h
#import <UIKit/UIKit.h>
#import “iCarousel.h”
@interface iCarouselExampleViewController : UIViewController <iCarouselDataSource, iCarouselDelegate>
@property (nonatomic, strong) IBOutlet iCarousel *carousel;
@property (nonatomic, strong) IBOutlet UINavigationItem *navItem;
@property (nonatomic, strong) IBOutlet UIBarItem *orientationBarItem;
@property (nonatomic, strong) IBOutlet UIBarItem *wrapBarItem;
– (IBAction)switchCarouselType;
– (IBAction)toggleOrientation;
– (IBAction)toggleWrap;
– (IBAction)insertItem;
– (IBAction)removeItem;
@end
iCarouselExampleViewController.m
#import “iCarouselExampleViewController.h”
#pragma GCC diagnostic ignored “-Wgnu”
@interface iCarouselExampleViewController () <UIActionSheetDelegate>
@property (nonatomic, assign) BOOL wrap;
@property (nonatomic, strong) NSMutableArray *items;
@end
@implementation iCarouselExampleViewController
@synthesize carousel;
@synthesize navItem;
@synthesize orientationBarItem;
@synthesize wrapBarItem;
@synthesize wrap;
@synthesize items;
– (void)setUp
{
//set up data
self.wrap = YES;
self.items = [NSMutableArray array];
for (int i = 0; i < 10; i++)
{
[self.items addObject:@(i)];
}
}
– (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]))
{
[self setUp];
}
return self;
}
– (id)initWithCoder:(NSCoder *)aDecoder
{
if ((self = [super initWithCoder:aDecoder]))
{
[self setUp];
}
return self;
}
– (void)dealloc
{
//it’s a good idea to set these to nil here to avoid
//sending messages to a deallocated viewcontroller
carousel.delegate = nil;
carousel.dataSource = nil;
}
#pragma mark –
#pragma mark View lifecycle
– (void)viewDidLoad
{
[super viewDidLoad];
//configure carousel
self.carousel.type = iCarouselTypeCoverFlow2;
self.navItem.title = @”CoverFlow2″;
}
– (void)viewDidUnload
{
[super viewDidUnload];
self.carousel = nil;
self.navItem = nil;
self.orientationBarItem = nil;
self.wrapBarItem = nil;
}
– (BOOL)shouldAutorotateToInterfaceOrientation:(__unused UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
– (IBAction)switchCarouselType
{
UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@”Select Carousel Type”
delegate:self
cancelButtonTitle:nil
destructiveButtonTitle:nil
otherButtonTitles:@”Linear”, @”Rotary”, @”Inverted Rotary”, @”Cylinder”, @”Inverted Cylinder”, @”Wheel”, @”Inverted Wheel”, @”CoverFlow”, @”CoverFlow2″, @”Time Machine”, @”Inverted Time Machine”, @”Custom”, nil];
[sheet showInView:self.view];
}
– (IBAction)toggleOrientation
{
//carousel orientation can be animated
[UIView beginAnimations:nil context:nil];
self.carousel.vertical = !self.carousel.vertical;
[UIView commitAnimations];
//update button
self.orientationBarItem.title = self.carousel.vertical? @”Vertical”: @”Horizontal”;
}
– (IBAction)toggleWrap
{
self.wrap = !self.wrap;
self.wrapBarItem.title = self.wrap? @”Wrap: ON”: @”Wrap: OFF”;
[self.carousel reloadData];
}
– (IBAction)insertItem
{
NSInteger index = MAX(0, self.carousel.currentItemIndex);
[self.items insertObject:@(self.carousel.numberOfItems) atIndex:(NSUInteger)index];
[self.carousel insertItemAtIndex:index animated:YES];
}
– (IBAction)removeItem
{
if (self.carousel.numberOfItems > 0)
{
NSInteger index = self.carousel.currentItemIndex;
[self.items removeObjectAtIndex:(NSUInteger)index];
[self.carousel removeItemAtIndex:index animated:YES];
}
}
#pragma mark –
#pragma mark UIActionSheet methods
– (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex >= 0)
{
//map button index to carousel type
iCarouselType type = buttonIndex;
//carousel can smoothly animate between types
[UIView beginAnimations:nil context:nil];
self.carousel.type = type;
[UIView commitAnimations];
//update title
self.navItem.title = [actionSheet buttonTitleAtIndex:buttonIndex];
}
}
#pragma mark –
#pragma mark iCarousel methods
– (NSInteger)numberOfItemsInCarousel:(__unused iCarousel *)carousel
{
return (NSInteger)[self.items count];
}
– (UIView *)carousel:(__unused iCarousel *)carousel viewForItemAtIndex:(NSInteger)index reusingView:(UIView *)view
{
UILabel *label = nil;
//create new view if no view is available for recycling
if (view == nil)
{
view = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200.0f, 200.0f)];
((UIImageView *)view).image = [UIImage imageNamed:@”page.png”];
view.contentMode = UIViewContentModeCenter;
label = [[UILabel alloc] initWithFrame:view.bounds];
label.backgroundColor = [UIColor clearColor];
label.textAlignment = UITextAlignmentCenter;
label.font = [label.font fontWithSize:50];
label.tag = 1;
[view addSubview:label];
}
else
{
//get a reference to the label in the recycled view
label = (UILabel *)[view viewWithTag:1];
}
//set item label
//remember to always set any properties of your carousel item
//views outside of the `if (view == nil) {…}` check otherwise
//you’ll get weird issues with carousel item content appearing
//in the wrong place in the carousel
label.text = [self.items[(NSUInteger)index] stringValue];
return view;
}
– (NSInteger)numberOfPlaceholdersInCarousel:(__unused iCarousel *)carousel
{
//note: placeholder views are only displayed on some carousels if wrapping is disabled
return 2;
}
– (UIView *)carousel:(__unused iCarousel *)carousel placeholderViewAtIndex:(NSInteger)index reusingView:(UIView *)view
{
UILabel *label = nil;
//create new view if no view is available for recycling
if (view == nil)
{
//don’t do anything specific to the index within
//this `if (view == nil) {…}` statement because the view will be
//recycled and used with other index values later
view = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200.0f, 200.0f)];
((UIImageView *)view).image = [UIImage imageNamed:@”page.png”];
view.contentMode = UIViewContentModeCenter;
label = [[UILabel alloc] initWithFrame:view.bounds];
label.backgroundColor = [UIColor clearColor];
label.textAlignment = UITextAlignmentCenter;
label.font = [label.font fontWithSize:50.0f];
label.tag = 1;
[view addSubview:label];
}
else
{
//get a reference to the label in the recycled view
label = (UILabel *)[view viewWithTag:1];
}
//set item label
//remember to always set any properties of your carousel item
//views outside of the `if (view == nil) {…}` check otherwise
//you’ll get weird issues with carousel item content appearing
//in the wrong place in the carousel
label.text = (index == 0)? @”[“: @”]”;
return view;
}
– (CATransform3D)carousel:(__unused iCarousel *)carousel itemTransformForOffset:(CGFloat)offset baseTransform:(CATransform3D)transform
{
//implement ‘flip3D’ style carousel
transform = CATransform3DRotate(transform, M_PI / 8.0f, 0.0f, 1.0f, 0.0f);
return CATransform3DTranslate(transform, 0.0f, 0.0f, offset * self.carousel.itemWidth);
}
– (CGFloat)carousel:(__unused iCarousel *)carousel valueForOption:(iCarouselOption)option withDefault:(CGFloat)value
{
//customize carousel display
switch (option)
{
case iCarouselOptionWrap:
{
//normally you would hard-code this to YES or NO
return self.wrap;
}
case iCarouselOptionSpacing:
{
//add a bit of spacing between the item views
return value * 1.05f;
}
case iCarouselOptionFadeMax:
{
if (self.carousel.type == iCarouselTypeCustom)
{
//set opacity based on distance from camera
return 0.0f;
}
return value;
}
case iCarouselOptionShowBackfaces:
case iCarouselOptionRadius:
case iCarouselOptionAngle:
case iCarouselOptionArc:
case iCarouselOptionTilt:
case iCarouselOptionCount:
case iCarouselOptionFadeMin:
case iCarouselOptionFadeMinAlpha:
case iCarouselOptionFadeRange:
case iCarouselOptionOffsetMultiplier:
case iCarouselOptionVisibleItems:
{
return value;
}
}
}
#pragma mark –
#pragma mark iCarousel taps
– (void)carousel:(__unused iCarousel *)carousel didSelectItemAtIndex:(NSInteger)index
{
NSNumber *item = (self.items)[(NSUInteger)index];
NSLog(@”Tapped view number: %@”, item);
}
– (void)carouselCurrentItemIndexDidChange:(__unused iCarousel *)carousel
{
NSLog(@”Index: %@”, @(self.carousel.currentItemIndex));
}
@end
iCarouselExampleAppDelegate.h
#import <UIKit/UIKit.h>
@class iCarouselExampleViewController;
@interface iCarouselExampleAppDelegate : NSObject <UIApplicationDelegate>
@property (nonatomic, strong) IBOutlet UIWindow *window;
@property (nonatomic, strong) IBOutlet iCarouselExampleViewController *viewController;
@end
iCarouselExampleAppDelegate.m
#import “iCarouselExampleAppDelegate.h”
#import “iCarouselExampleViewController.h”
@implementation iCarouselExampleAppDelegate
@synthesize window;
@synthesize viewController;
– (BOOL)application:(__unused UIApplication *)application didFinishLaunchingWithOptions:(__unused NSDictionary *)launchOptions
{
[self.window addSubview:self.viewController.view];
[self.window makeKeyAndVisible];
return YES;
}
@end
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