十三，iOS使用UIView做輪播

代碼寫的有點亂，後面可以根據自己的去加東西或者改什麽的；

1，使用UIView做輪播同樣也是使用數組的形式加載view

2，代碼如下.h文件

#import <UIKit/UIKit.h>

@protocol BannerViewDelegate;

@interface BannerView : UIView <UIScrollViewDelegate>
{
    __unsafe_unretained id <BannerViewDelegate> _delegate;
}

@property (nonatomic, assign) id <BannerViewDelegate> bannerdelegate;

@property (nonatomic, assign) NSInteger currentPage;

//@property (nonatomic, strong) NSMutableArray *imageViewAry;

@property (nonatomic, readonly) UIScrollView *scrollView;

@property (nonatomic, readonly) UIPageControl *pageControl;

-(void)shouldAutoShow:(BOOL)shouldStart;
//-(instancetype)initWithViews:(NSArray <UIView *>*)views;
- (id)initWithFrame:(CGRect)frame;
-(void)setImageViewAry:(NSArray <UIView *>*)iViewAry;
//-(void)shouldAutoShow:(BOOL)shouldStart;
@end

@protocol BannerViewDelegate <NSObject>

@optional
- (void)didClickPage:(BannerView *)view atIndex:(NSInteger)index;

@end

3，.m文件

#import "BannerView.h"
@interface BannerView ()
{
    UIView *_firstView;
    UIView *_middleView;
    UIView *_lastView;
    
    float _viewWidth;
    float _viewHeight;
    
    NSTimer *_autoScrollTimer;
    
    UITapGestureRecognizer *_tap;
    BOOL startanimation;
}
@property (nonatomic, strong) NSArray <UIView *>* viewList;

@property (nonatomic) NSInteger showIndex;
@end

@implementation BannerView
- (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 clearColor];
        _scrollView.delegate = self;
        [self addSubview:_scrollView];
        
        //設置分頁
        _pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, 0, _viewWidth, 30)];
        _pageControl.userInteractionEnabled = NO;
        _pageControl.currentPageIndicatorTintColor = [UIColor redColor];
        _pageControl.pageIndicatorTintColor = [UIColor whiteColor];
        _pageControl.backgroundColor = [UIColor yellowColor];
        [self addSubview:_pageControl];
       
        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTap:)];
        [self addGestureRecognizer:tap];
    }
    return self;
}

#pragma mark 單擊手勢
-(void)handleTap:(UITapGestureRecognizer*)sender
{
    if ([_bannerdelegate respondsToSelector:@selector(didClickPage:atIndex:)]) {
        [_bannerdelegate didClickPage:self atIndex:_currentPage+1];
    }
   
}

#pragma mark 設置imageViewAry
-(void)setImageViewAry:(NSArray <UIView *>*)iViewAry
{
    NSLog(@"imview===%@",iViewAry);
    if (iViewAry) {
        _viewList = iViewAry;
        _currentPage = 0; //默認為第0頁
        _pageControl.numberOfPages = _viewList.count;
    }
    
    [self reloadData];
}

#pragma mark 刷新view頁面
-(void)reloadData
{
    if (!_firstView) {
        NSLog(@"1");
        startanimation = YES;
    }else{
        [UIView animateWithDuration:0.5 animations:^{
            _firstView.frame = CGRectMake(_viewWidth, 0, _viewWidth, _viewHeight);
            _middleView.frame = CGRectMake(0, 0, _viewHeight, _viewHeight);
            _lastView.frame = CGRectMake(_viewWidth*2, 0, _viewWidth, _viewHeight);
            NSLog(@"2");
            startanimation = NO;
        } completion:^(BOOL finished) {
            
        }];
    }
   
    [_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 = [_viewList lastObject];
        _middleView = [_viewList objectAtIndex:_currentPage];
        _lastView = [_viewList objectAtIndex:_currentPage+1];
    }
    else if (_currentPage == _viewList.count-1)
    {
        _firstView = [_viewList objectAtIndex:_currentPage-1];
        _middleView = [_viewList objectAtIndex:_currentPage];
        _lastView = [_viewList firstObject];
    }
    else
    {
        _firstView = [_viewList objectAtIndex:_currentPage-1];
        _middleView = [_viewList objectAtIndex:_currentPage];
        _lastView = [_viewList 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];
    if (startanimation == YES) {
        _middleView.frame = CGRectMake(_viewWidth, 0, _viewWidth, _viewHeight);
    }else{
    [UIView animateWithDuration:0.5 animations:^{
        
        _middleView.frame = CGRectMake(_viewWidth, 0, _viewWidth, _viewHeight);

        
    }];
    }
    //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];
    [[NSRunLoop currentRunLoop]addTimer:_autoScrollTimer forMode:NSDefaultRunLoopMode];
    //得到當前頁數
    float x = _scrollView.contentOffset.x;
    
    //往前翻
    if (x<=0) {
        if (_currentPage-1<0) {
            _currentPage = _viewList.count-1;
        }else{
            _currentPage --;
        }
    }
    
    //往後翻
    if (x>=_viewWidth*2) {
        if (_currentPage==_viewList.count-1) {
            _currentPage = 0;
        }else{
            _currentPage ++;
        }
    }
    
    [self reload];
}
-(void)reload
{
    startanimation = YES;
 
    
    [_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 = [_viewList lastObject];
        _middleView = [_viewList objectAtIndex:_currentPage];
        _lastView = [_viewList objectAtIndex:_currentPage+1];
    }
    else if (_currentPage == _viewList.count-1)
    {
        _firstView = [_viewList objectAtIndex:_currentPage-1];
        _middleView = [_viewList objectAtIndex:_currentPage];
        _lastView = [_viewList firstObject];
    }
    else
    {
        _firstView = [_viewList objectAtIndex:_currentPage-1];
        _middleView = [_viewList objectAtIndex:_currentPage];
        _lastView = [_viewList 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);
    if (startanimation == YES) {
        _middleView.frame = CGRectMake(_viewWidth, 0, _viewWidth, _viewHeight);
    }else{
        [UIView animateWithDuration:0.5 animations:^{
            
            _middleView.frame = CGRectMake(_viewWidth, 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 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];
            [[NSRunLoop currentRunLoop]addTimer:_autoScrollTimer forMode:NSDefaultRunLoopMode];

        }
    }
    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 == _viewList.count-1) {
        _currentPage = 0;
    }else{
        _currentPage ++;
    }
    [self reloadData];
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/

@end

4.最後是使用

#import "BovViewController.h"
#import "BannerView.h"
#import "oneview.h"
#import "twoview.h"
#import "threeview.h"
#import "fourview.h"
@interface BovViewController ()<UIScrollViewDelegate,BannerViewDelegate>

@property (strong , nonatomic) oneview *oneView;
@property (strong , nonatomic) twoview *twoView;
@property (strong , nonatomic) threeview *threeView;
@property (strong , nonatomic) fourview *fourview;
@property (nonatomic, strong) NSArray <UIView *>* viewList;
@end

@implementation BovViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = kDefaultBackgroundColor;
    // Do any additional setup after loading the view.
    
    //設置視圖的背景顏色
//    self.view.backgroundColor = [UIColor blackColor];
    //調用 setuoPage方法
 
    _oneView = [[oneview alloc]init];
    _threeView = [[threeview alloc]init];
    _twoView = [[twoview alloc]init];
    _fourview = [[fourview alloc]init];
//    _viewList = @[_oneView,_twoView,_threeView];
    
//      [self setupPage:nil];
    BannerView *bannerview = [[BannerView alloc]initWithFrame:
                              CGRectMake(0, Begin_Top_Y + 345, W, 301)];
    [bannerview setImageViewAry:@[_oneView,_twoView,_threeView,_fourview]];
    [bannerview shouldAutoShow:YES];
    bannerview.bannerdelegate = self;
//    bannerview.frame = CGRectMake(0, Begin_Top_Y + 345, W, 301);
////    bannerview.backgroundColor = [UIColor redColor];
    [self.view addSubview:bannerview];
}
//改變滾動視圖的方法實現
- (void)didClickPage:(BannerView *)view atIndex:(NSInteger)index{
    NSLog(@"banner==%ld",(long)index);
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

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