#import "ViewController.h"

#import <AsyncDisplayKit/AsyncDisplayKit.h>

#import "PageNode.h"

static UIColor *randomColor() {

CGFloat hue = ( arc4random() % 256 / 256.0 ); // 0.0 to 1.0

CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5; // 0.5 to 1.0, away from white

CGFloat brightness = ( arc4random() % 128 / 256.0 ) + 0.5; // 0.5 to 1.0, away from black

return [UIColor colorWithHue:hue saturation:saturation brightness:brightness alpha:1];

}

@interface ViewController () <ASPagerNodeDataSource>

@implementation ViewController

- (instancetype)init

{

self = [super initWithNode:[[ASPagerNode alloc] init]];

if (self == nil) {

return self;

}

self.title = @"Pages";

self.node.dataSource = self;

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Next" style:UIBarButtonItemStylePlain target:self action:@selector(scrollToNextPage:)];

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Previous" style:UIBarButtonItemStylePlain target:self action:@selector(scrollToPreviousPage:)];

self.automaticallyAdjustsScrollViewInsets = NO;

return self;

}

#pragma mark - Actions

- (void)scrollToNextPage:(id)sender

{

[self.node scrollToPageAtIndex:self.node.currentPageIndex+1 animated:YES];

}

- (void)scrollToPreviousPage:(id)sender

{

[self.node scrollToPageAtIndex:self.node.currentPageIndex-1 animated:YES];

}

#pragma mark - ASPagerNodeDataSource

- (NSInteger)numberOfPagesInPagerNode:(ASPagerNode *)pagerNode

{

return 5;

}

- (ASCellNodeBlock)pagerNode:(ASPagerNode *)pagerNode nodeBlockAtIndex:(NSInteger)index

{

return ^{

PageNode *page = [[PageNode alloc] init];

page.backgroundColor = randomColor();

return page;

};

}