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#import <UIKit/UIKit.h>

@interface DIEPageView : UIView<UIScrollViewDelegate>{

}

@property (nonatomic, assign) id? delegate;

@property (nonatomic, assign) NSInteger currentPage;

@property (nonatomic, strong) NSMutableArray *imageViewAry;

@property (nonatomic, readonly) UIScrollView *scrollView;

@property (nonatomic, readonly) UIPageControl *pageControl;

-(void)shouldAutoShow:(BOOL)shouldStart;

@end

@protocol WHcrollViewViewDelegate <NSObject>

@optional

- (void)didClickPage:(DIEPageView *)view atIndex:(NSInteger)index;

@end

#import "DIEPageView.h"

@interface DIEPageView(){

? ? UIView *_firstView;

? ? UIView *_middleView;

? ? UIView *_lastView;

?? ?

? ? float _viewWidth;

? ? float _viewHeight;

?? ?

? ? NSTimer *_autoScrollTimer;

?? ?

? ? UITapGestureRecognizer *_tap;

}

@end

@implementation DIEPageView

/*

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect {

? ? // Drawing code

}

*/

- (id)initWithFrame:(CGRect)frame

{ ?

? ? self = [super initWithFrame:frame];

? ? if (self) {

?? ? ? ?

? ? ? ? _viewWidth = self.bounds.size.width;

? ? ? ? _viewHeight = self.bounds.size.height;

?? ? ? ?

? ? ? ? //設置scrollview

? ? ? ? _scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, _viewWidth, _viewHeight)];

? ? ? ? _scrollView.delegate = self;

? ? ? ? _scrollView.contentSize = CGSizeMake(_viewWidth * 3, _viewHeight);

? ? ? ? _scrollView.showsHorizontalScrollIndicator = NO;

? ? ? ? _scrollView.pagingEnabled = YES;

? ? ? ? _scrollView.backgroundColor = [UIColor blackColor];

? ? ? ? _scrollView.delegate = self;

? ? ? ? [self addSubview:_scrollView];

?? ? ? ?

? ? ? ? //設置分頁

? ? ? ? _pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, _viewHeight-30, _viewWidth, 30)];

? ? ? ? _pageControl.userInteractionEnabled = NO;

? ? ? ? _pageControl.currentPageIndicatorTintColor = [UIColor redColor];

? ? ? ? _pageControl.pageIndicatorTintColor = [UIColor whiteColor];

? ? ? ? [self addSubview:_pageControl];

?? ? ? ?

? ? ? ? //設置單擊手勢

? ? ? ? _tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTap:)];

? ? ? ? _tap.numberOfTapsRequired = 1;

? ? ? ? _tap.numberOfTouchesRequired = 1;

? ? ? ? [_scrollView addGestureRecognizer:_tap];

? ? }

? ? return self;

}

#pragma mark 單擊手勢

-(void)handleTap:(UITapGestureRecognizer*)sender

{

? ? if ([_delegate respondsToSelector:@selector(didClickPage:atIndex:)]) {

? ? ? ? [_delegate didClickPage:self atIndex:_currentPage+1];

? ? }

}

#pragma mark 設置imageViewAry

-(void)setImageViewAry:(NSMutableArray *)imageViewAry

{

? ? if (imageViewAry) {

? ? ? ? _imageViewAry = imageViewAry;

? ? ? ? _currentPage = 0; //默認為第0頁

?? ? ? ?

? ? ? ? _pageControl.numberOfPages = _imageViewAry.count;

? ? }

?? ?

? ? [self reloadData];

}

#pragma mark 刷新view頁面

-(void)reloadData

{

? ? [_firstView removeFromSuperview];

? ? [_middleView removeFromSuperview];

? ? [_lastView removeFromSuperview];

?? ?

? ? //從數組中取到對應的圖片view加到已定義的三個view中

? ? if (_currentPage==0) {

? ? ? ? _firstView = [_imageViewAry lastObject];

? ? ? ? _middleView = [_imageViewAry objectAtIndex:_currentPage];

? ? ? ? _lastView = [_imageViewAry objectAtIndex:_currentPage+1];

? ? }

? ? else if (_currentPage == _imageViewAry.count-1)

? ? {

? ? ? ? _firstView = [_imageViewAry objectAtIndex:_currentPage-1];

? ? ? ? _middleView = [_imageViewAry objectAtIndex:_currentPage];

? ? ? ? _lastView = [_imageViewAry firstObject];

? ? }

? ? else

? ? {

? ? ? ? _firstView = [_imageViewAry objectAtIndex:_currentPage-1];

? ? ? ? _middleView = [_imageViewAry objectAtIndex:_currentPage];

? ? ? ? _lastView = [_imageViewAry objectAtIndex:_currentPage+1];

? ? }

?? ?

? ? //設置三個view的frame，加到scrollview上

? ? _firstView.frame = CGRectMake(0, 0, _viewWidth, _viewHeight);

? ? _middleView.frame = CGRectMake(_viewWidth, 0, _viewWidth, _viewHeight);

? ? _lastView.frame = CGRectMake(_viewWidth*2, 0, _viewWidth, _viewHeight);

? ? [_scrollView addSubview:_firstView];

? ? [_scrollView addSubview:_middleView];

? ? [_scrollView addSubview:_lastView];

?? ?

? ? //設置當前的分頁

? ? _pageControl.currentPage = _currentPage;

?? ?

? ? //顯示中間頁

? ? _scrollView.contentOffset = CGPointMake(_viewWidth, 0);

}

#pragma mark scrollvie停止滑動

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

? ? //手動滑動時候暫停自動替換

? ? [_autoScrollTimer invalidate];

? ? _autoScrollTimer = nil;

? ? _autoScrollTimer = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(autoShowNextImage) userInfo:nil repeats:YES];

?? ?

? ? //得到當前頁數

? ? float x = _scrollView.contentOffset.x;

?? ?

? ? //往前翻

? ? if (x<=0) {

? ? ? ? if (_currentPage-1<0) {

? ? ? ? ? ? _currentPage = _imageViewAry.count-1;

? ? ? ? }else{

? ? ? ? ? ? _currentPage --;

? ? ? ? }

? ? }

?? ?

? ? //往后翻

? ? if (x>=_viewWidth*2) {

? ? ? ? if (_currentPage==_imageViewAry.count-1) {

? ? ? ? ? ? _currentPage = 0;

? ? ? ? }else{

? ? ? ? ? ? _currentPage ++;

? ? ? ? }

? ? }

?? ?

? ? [self reloadData];

}

#pragma mark 自動滾動

-(void)shouldAutoShow:(BOOL)shouldStart

{

? ? if (shouldStart)? //開啟自動翻頁

? ? {

? ? ? ? if (!_autoScrollTimer) {

? ? ? ? ? ? _autoScrollTimer = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(autoShowNextImage) userInfo:nil repeats:YES];

? ? ? ? }

? ? }

? ? else ? //關閉自動翻頁

? ? {

? ? ? ? if (_autoScrollTimer.isValid) {

? ? ? ? ? ? [_autoScrollTimer invalidate];

? ? ? ? ? ? _autoScrollTimer = nil;

? ? ? ? }

? ? }

}

#pragma mark 展示下一頁

-(void)autoShowNextImage

{

? ? if (_currentPage == _imageViewAry.count-1) {

? ? ? ? _currentPage = 0;

? ? }else{

? ? ? ? _currentPage ++;

? ? }

?? ?

? ? [self reloadData];

}

@end

#import "AdvertiseViewController.h"

#import "DIEPageView.h"

@interface AdvertiseViewController (){

? ? DIEPageView *_whView;

}

@end

@implementation AdvertiseViewController

- (void)viewDidLoad {

? ? [super viewDidLoad];

? ? // Do any additional setup after loading the view.

? ? //創建view （view中包含UIScrollView、UIPageControl，設置frame）

? ? _whView = [[DIEPageView alloc] initWithFrame:CGRectMake(0, 44, 320, 400)];

?? ?

? ? //把N張圖片放到imageview上

? ? NSMutableArray *tempAry = [NSMutableArray array];

? ? for (int i=1; i<6; i++) {

? ? ? ? UIImageView *imageView = [[UIImageView alloc] init];

? ? ? ? imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",i]];

? ? ? ? [tempAry addObject:imageView];

? ? }

?? ?

? ? //把imageView數組存到whView里

? ? [_whView setImageViewAry:tempAry];

?? ?

? ? //把圖片展示的view加到當前頁面

? ? [self.view addSubview:_whView];

?? ?

? ? //開啟自動翻頁

? ? [_whView shouldAutoShow:YES];

?? ?

? ? //遵守協議

? ? _whView.delegate = self;

}

#pragma mark 協議里面方法，點擊某一頁

-(void)didClickPage:(DIEPageView *)view atIndex:(NSInteger)index

{

? ? NSLog(@"點擊了第%li頁",index);

}

#pragma mark 界面消失的時候，停止自動滾動

-(void)viewDidDisappear:(BOOL)animated

{

? ? [_whView shouldAutoShow:NO];

}

@end

轉載于:https://my.oschina.net/u/2534536/blog/536071

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