ios 无限循环翻页源码例子

demo功能：ios 无限循环翻页源码例子。iphone 6.1测试通过。

demo说明：MyScrollView.m中又主要的页面控制代码。使用 UIScrollView和 UIPageControl控件。通过在滚动结束时设置uiscrollview的内容起始坐标来实现无限制循环。

demo截屏：

demo主要代码：MyScrollView.m

 - (id)initWithFrame:(CGRect)frame 
{ 
    self = [super initWithFrame:frame]; 
    if (self) { 
        // Initialization code  
         
        //UIScrollView  
        carScroll=[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 1024, 748)]; 
        [carScroll setContentSize:CGSizeMake(1024*(TOTLE_PAGE+1), 100)]; 
        [carScroll setShowsHorizontalScrollIndicator:NO]; 
        [carScroll setPagingEnabled:YES]; 
        [carScroll setDelegate:self]; 
         
        for(int i=0; i<TOTLE_PAGE+1; i++) { 
            UIImageView *scrollImg = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[NSString stringWithFormat:@"%d.png",i]]] ; 
            scrollImg.frame = CGRectMake(1024*i, 0, 1024, 748); 
            scrollImg.tag = 2220+i; 
            scrollImg.userInteractionEnabled = YES; 
            UITapGestureRecognizer *tapGestrue = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)]; 
            [scrollImg addGestureRecognizer:tapGestrue]; 
            [tapGestrue release], tapGestrue = nil; 
            [carScroll addSubview:scrollImg]; 
            [scrollImg release], scrollImg = nil; 
        } 
        [self addSubview:carScroll]; 
         
         
        //carPageControl  
        carPageControl=[[UIPageControl alloc] initWithFrame:CGRectMake(380, 700, 350, 26)]; 
        [carPageControl setNumberOfPages:TOTLE_PAGE]; 
        [carPageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged]; 
        [self addSubview:carPageControl]; 
         
    } 
    return self; 
} 
 
#pragma mark -  
#pragma ScrollView Delegate  
 
-(void) scrollViewDidScroll:(UIScrollView *)scrollView  
{ 
    int offsetX = scrollView.contentOffset.x; 
    if(offsetX < 0){ 
        [scrollView setContentOffset:CGPointMake(1024*TOTLE_PAGE, 0)]; 
    } 
    if(offsetX > 1024*TOTLE_PAGE){ 
        [scrollView setContentOffset:CGPointMake(0, 0)]; 
    } 
} 
 
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView 
{ 
    int offsetX = scrollView.contentOffset.x; 
    if(offsetX/1024 == TOTLE_PAGE){ 
        [scrollView setContentOffset:CGPointMake(0, 0)]; 
        carPageControl.currentPage = 0; 
    } 
    if(offsetX%1024 == 0){ 
        [carPageControl setCurrentPage:scrollView.contentOffset.x/1024]; 
    } 
} 

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
       
        //UIScrollView
        carScroll=[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 1024, 748)];
  [carScroll setContentSize:CGSizeMake(1024*(TOTLE_PAGE+1), 100)];
  [carScroll setShowsHorizontalScrollIndicator:NO];
  [carScroll setPagingEnabled:YES];
  [carScroll setDelegate:self];
       
  for(int i=0; i<TOTLE_PAGE+1; i++) {
            UIImageView *scrollImg = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[NSString stringWithFormat:@"%d.png",i]]] ;
            scrollImg.frame = CGRectMake(1024*i, 0, 1024, 748);
            scrollImg.tag = 2220+i;
            scrollImg.userInteractionEnabled = YES;
            UITapGestureRecognizer *tapGestrue = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];
            [scrollImg addGestureRecognizer:tapGestrue];
            [tapGestrue release], tapGestrue = nil;
            [carScroll addSubview:scrollImg];
            [scrollImg release], scrollImg = nil;
  }
  [self addSubview:carScroll];
  
  
  //carPageControl
  carPageControl=[[UIPageControl alloc] initWithFrame:CGRectMake(380, 700, 350, 26)];
  [carPageControl setNumberOfPages:TOTLE_PAGE];
  [carPageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged];
        [self addSubview:carPageControl];
       
    }
    return self;
}

#pragma mark -
#pragma ScrollView Delegate

-(void) scrollViewDidScroll:(UIScrollView *)scrollView
{
    int offsetX = scrollView.contentOffset.x;
 if(offsetX < 0){
  [scrollView setContentOffset:CGPointMake(1024*TOTLE_PAGE, 0)];
 }
 if(offsetX > 1024*TOTLE_PAGE){
  [scrollView setContentOffset:CGPointMake(0, 0)];
 }
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    int offsetX = scrollView.contentOffset.x;
 if(offsetX/1024 == TOTLE_PAGE){
  [scrollView setContentOffset:CGPointMake(0, 0)];
        carPageControl.currentPage = 0;
 }
 if(offsetX%1024 == 0){
  [carPageControl setCurrentPage:scrollView.contentOffset.x/1024];
 }
}

 

 

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