1 #import "MassageViewController.h"  2 @interface MassageViewController()
     
        3 @property (nonatomic,strong) UIScrollView *PicScrollView;  4 @property (nonatomic,strong) UIPageControl *PicCtr;  5 @property (nonatomic,strong) NSTimer *timer;  6 @property (nonatomic,strong) NSMutableArray *picArr;  7 @property (nonatomic,strong) UIImageView *PicImageView;  8 @property (nonatomic,strong) UIImageView *lastImageView;  9 @end 10  11 @implementation MassageViewController 12 -(NSMutableArray *)picArr{ 13     if (self.picArr==nil) { 14         _picArr = [NSMutableArray array]; 15     } 16     return _picArr; 17 } 18  19 -(void)viewDidLoad{ 20     self.picArr = [self loadImageData]; 21     self.PicScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 150, self.view.frame.size.width, 200)]; 22     _PicScrollView.pagingEnabled = YES; 23     _PicScrollView.delegate = self; 24     _PicScrollView.showsHorizontalScrollIndicator = NO; 25     _PicScrollView.tag = 1000; 26     _PicScrollView.contentSize = CGSizeMake(self.PicScrollView.width * (_picArr.count), 0); 27     for (int i =0; i<_picArr.count; i++) { 28         CGFloat imgX = self.view.frame.size.width * i; 29         self.PicImageView = [[UIImageView alloc]initWithFrame:CGRectMake(imgX, 0, self.view.frame.size.width, 200)]; 30         _PicImageView.image = [_picArr objectAtIndex:i]; 31         [_PicScrollView addSubview:_PicImageView]; 32     } 33     CGFloat imgX = CGRectGetWidth(self.view.frame)*_picArr.count; 34     _lastImageView = [[UIImageView alloc]initWithFrame:CGRectMake(imgX, 0, self.view.frame.size.width, 200)]; 35     _lastImageView.image = [_picArr objectAtIndex:0]; 36     [_PicScrollView addSubview:_lastImageView]; 37      38      39     [self.view addSubview:_PicScrollView]; 40     self.PicCtr = [[UIPageControl alloc]initWithFrame:CGRectMake((self.PicScrollView.width-150)/2, self.PicScrollView.y+200-40, 150, 30)]; 41     _PicCtr.pageIndicatorTintColor = [UIColor grayColor]; 42     _PicCtr.currentPageIndicatorTintColor = [UIColor redColor]; 43     _PicCtr.numberOfPages = 5; 44     _PicCtr.currentPage = 0; 45     [self.view addSubview:_PicCtr]; 46     [self.view bringSubviewToFront:_PicCtr]; 47      48     self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(scrollImage) userInfo:nil repeats:YES]; 49     //修改优先级与其他控件一样 50     //获取当前消息循环对象 51     NSRunLoop *runLoop = [NSRunLoop currentRunLoop]; 52     //设置优先级 53     [runLoop addTimer:self.timer forMode:NSRunLoopCommonModes]; 54 } 55  56 -(NSMutableArray *)loadImageData{//加载图片 57     NSMutableArray *arr = [NSMutableArray array]; 58     for (int i = 0; i<5; i++) {
    　　　　　　　　//为了节约内存，建议使用路径加载，注意图片不要放在Assets.xcassets里面，否则读取不到 59         NSString *imgName = [NSString stringWithFormat:@"%02d.jpg",i+1];//注意.jpg格式，图片格式统一 60         NSString *imgPath = [[NSBundle mainBundle]pathForResource:imgName ofType:nil]; 61         UIImage *image = [UIImage imageWithContentsOfFile:imgPath]; 62         [arr addObject:image]; 63     } 64     return arr; 65 } 66  67 -(UIStatusBarStyle)preferredStatusBarStyle{ 68     return UIStatusBarStyleLightContent; 69 } 70  71 -(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{ 72     //停止计时器 73     [self.timer invalidate]; 74     self.timer = nil; 75 } 76  77 -(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{ 78      79     //r如果放到didscroll里面，每次自动播放都会调用，我们想要手指拖动时才调用，所以放到这里面，每次拖到第几张，白点就点亮 80     CGFloat offsetX = self.PicScrollView.contentOffset.x + self.PicScrollView.frame.size.width/2; 81     int index = offsetX/self.PicScrollView.width; 82     _PicCtr.currentPage = index; 83  84     //重新启用计时器 85     self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(scrollImage) userInfo:nil repeats:YES]; 86     //修改优先级与其他控件一样 87     //获取当前消息循环对象 88     NSRunLoop *runLoop = [NSRunLoop currentRunLoop]; 89     //设置优先级 90     [runLoop addTimer:self.timer forMode:NSRunLoopCommonModes]; 91 } 92  93 -(void)scrollImage{ 94     //在scrollview后面加一个imageview，和第一个图一样。 95     float offsetx = _PicScrollView.contentOffset.x; 96     offsetx += CGRectGetWidth(self.view.frame); 97     if (offsetx == CGRectGetWidth(self.view.frame)*_picArr.count) { 98         _PicCtr.currentPage = 0; 99     }else{100         _PicCtr.currentPage = offsetx/CGRectGetWidth(self.view.frame);101     }102     if (offsetx>CGRectGetWidth(self.view.frame)*_picArr.count) {103         //直接复制速度很快直接和lastImageView一样，看起来就是循环播放的104         _PicScrollView.contentOffset= CGPointMake(0, 0);105         _PicCtr.currentPage = 1;106         [_PicScrollView setContentOffset:CGPointMake(CGRectGetWidth(self.view.frame), 0)  animated:YES];107     }else{108         [_PicScrollView setContentOffset:CGPointMake(offsetx, 0) animated:YES];109     }110 }111 @end