循環uiscroll﹠page view

1，在viewcontroller先宣告 
2，在viewdidload //新增自己的View 
 MyView=self.advertisementView; //MyView = [[[UIView alloc] initWithFrame:CGRectMake(0.f, 0.f, self.view.frame.size.width, 180.f)]autorelease]; self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(10.f, 10.f, self.view.frame.size.width-20.f, 150.f) ]; self.pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(0.f, 160.f, self.view.frame.size.width, 15.f)]; // _colors = [[NSArray alloc]initWithObjects: [UIColor redColor], [UIColor greenColor], [UIColor blueColor], [UIColor yellowColor], [UIColor orangeColor], nil]; self.pagesArray = [[NSMutableArray alloc] initWithArray:_colors]; //ScrollView 的內容總尺吋 : 原寬 x 有幾個分頁, 高不變 self.scrollView.backgroundColor = [UIColor clearColor]; self.scrollView.delegate = self; self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * 3, self.scrollView.frame.size.height); //設定是否啟動分頁機制 : 如不啟動，則會一直滑動不停 ; 如啟動，會一格一格的分頁顯示 self.scrollView.pagingEnabled = YES; self.scrollView.showsHorizontalScrollIndicator = NO; self.scrollView.showsVerticalScrollIndicator = NO; //設定 PageControl 的樣式 self.pageControl.backgroundColor = [UIColor clearColor]; self.pageControl.numberOfPages = self.pagesArray.count; self.pageControl.currentPage = 0; //設定 PageControl 的分頁數 self.pageControl.numberOfPages = self.pagesArray.count; self.pageControl.currentPage = 0; MyView.backgroundColor = [UIColor clearColor]; CGRect frame1; //定位每一個分頁 View 在 ScrollView 裡的位置( X 軸 ) frame1.origin.x = self.scrollView.frame.size.width * 0; // Y 軸不變 frame1.origin.y = 0; frame1.size = self.scrollView.frame.size; subview1 = [[UIView alloc] initWithFrame:frame1]; subview1.backgroundColor = [self.colors objectAtIndex:4]; CGRect frame2; //定位每一個分頁 View 在 ScrollView 裡的位置( X 軸 ) frame2.origin.x = self.scrollView.frame.size.width * 1; // Y 軸不變 frame2.origin.y = 0; frame2.size = self.scrollView.frame.size; subview2 = [[UIView alloc] initWithFrame:frame2]; subview2.backgroundColor = [self.colors objectAtIndex:0]; CGRect frame3; //定位每一個分頁 View 在 ScrollView 裡的位置( X 軸 ) frame3.origin.x = self.scrollView.frame.size.width * 2; // Y 軸不變 frame3.origin.y = 0; frame3.size = self.scrollView.frame.size; subview3 = [[UIView alloc] initWithFrame:frame3]; subview3.backgroundColor = [self.colors objectAtIndex:1]; //使用QuartzCore.framework替UIView加上圓角 //[subview1.layer setCornerRadius:15.0]; [_scrollView addSubview:subview1 ]; [_scrollView addSubview:subview2 ]; [_scrollView addSubview:subview3 ]; [self.scrollView scrollRectToVisible:CGRectMake(300.f, 0.f, self.scrollView.frame.size.width, self.scrollView.frame.size.height) animated:NO]; [MyView addSubview:self.scrollView]; [MyView addSubview:self.pageControl]; 

 3，實作uiscrollviewdelegate
 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{ NSLog(@"%d",self.pageControl.numberOfPages); 
 if (self.scrollView.contentOffset.x == 0.f) { 
 if (self.pageControl.currentPage==0) { self.pageControl.currentPage = self.pageControl.numberOfPages-1; }else{ self.pageControl.currentPage --; } }else if(self.scrollView.contentOffset.x == 600.f){ if (self.pageControl.currentPage==self.pageControl.numberOfPages-1) { self.pageControl.currentPage = 0; }else{ self.pageControl.currentPage++; } } int lastPage,currentPage,nextPage; currentPage = self.pageControl.currentPage; if (self.pageControl.currentPage==self.pageControl.numberOfPages-1) { lastPage = currentPage -1; nextPage = 0; }else if(self.pageControl.currentPage==0){ lastPage = self.pageControl.numberOfPages-1; nextPage = currentPage +1; }else{ lastPage = currentPage -1; nextPage = currentPage +1; } NSLog(@"next %d",nextPage); NSLog(@"current %d",currentPage); NSLog(@"last %d",lastPage); subview1.backgroundColor = [_colors objectAtIndex:lastPage]; subview2.backgroundColor = [_colors objectAtIndex:currentPage]; subview3.backgroundColor = [_colors objectAtIndex:nextPage]; NSLog(@"%d",self.pageControl.currentPage); [self.scrollView scrollRectToVisible:CGRectMake(300.f, 0.f, self.scrollView.frame.size.width, self.scrollView.frame.size.height) animated:NO]; }