//
//ViewController.m
//循环滑动
#import"ViewController.h"
#define kScreenWidth[UIScreen mainScreen].bounds.size.width
#define kScreenHeight[UIScreen mainScreen].bounds.size.height
@interfaceViewController()
{
UIScrollView* scrollView;
UIPageControl* pageCtr;
}
@end
@implementationViewController
- (void)viewDidLoad {
[superviewDidLoad];
//1:创建视图(scrollView,pageCtr)
[selfcreateScrollViewPageCtr];
}
- (void)createScrollViewPageCtr{
//1:创建scrollView
scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0,0, kScreenWidth, kScreenHeight)];
//最重要的属性滑动的范围
scrollView.contentSize = CGSizeMake(kScreenWidth*8, kScreenHeight);
//循环添加imageView
for(inti =0; i <6; i++)
{
//获取图片的名字
NSString *imageName = [NSString stringWithFormat:@"%i.jpg",i+1];
NSLog(@"%@",imageName);
//创建imageView
UIImageView * iamgeView = [[UIImageView alloc] initWithFrame:CGRectMake((i+1)*kScreenWidth,0, kScreenWidth, kScreenHeight)];
iamgeView.image = [UIImage imageNamed:imageName];
[scrollView addSubview:iamgeView];
}
[self.view addSubview:scrollView];
//添加到第1张前面
UIImageView *imageView1 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"6.jpg"]];
imageView1.frame = CGRectMake(0,0, kScreenWidth, kScreenHeight);
[scrollView addSubview:imageView1];
//添加第5后面的第一张
UIImageView *imageView5 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1.jpg"]];
imageView5.frame = CGRectMake(kScreenWidth*7,0, kScreenWidth, kScreenHeight);
[scrollView addSubview:imageView5];
//--------------------------------------
scrollView.contentOffset = CGPointMake(kScreenWidth,0);
//--------------------------------------
//属性分页
scrollView.pagingEnabled =YES;
//设置代理对象
scrollView.delegate =self;
//2:创建pageCtr
pageCtr = [[UIPageControl alloc] initWithFrame:CGRectMake(0, kScreenHeight/2, kScreenWidth,30)];
//属性
pageCtr.numberOfPages =6;
pageCtr.pageIndicatorTintColor = [UIColor grayColor];
pageCtr.currentPageIndicatorTintColor= [UIColor whiteColor];
//pageCtr.currentPage = 0;
//添加值改变的方法
[pageCtr addTarget:selfaction:@selector(pageCtrAction) forControlEvents:UIControlEventValueChanged];
//[pageCtr updateCurrentPageDisplay];
[self.view addSubview:pageCtr];
}
- (void)pageCtrAction{
//获取当前的pageCtr.currentPage当前页数
CGPoint point = CGPointMake(pageCtr.currentPage * kScreenWidth,0);
scrollView.contentOffset = point;
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
if(scrollView.contentOffset.x ==2240) {
scrollView.contentOffset = CGPointMake(kScreenWidth,0);
pageCtr.currentPage =0;
}
if(scrollView.contentOffset.x==0) {
scrollView.contentOffset = CGPointMake(kScreenWidth*6,0);
pageCtr.currentPage =6;
}
pageCtr.currentPage = scrollView.contentOffset.x / kScreenWidth-1;
NSLog(@"pageCtr.currentPage=%li",pageCtr.currentPage);
//NSLog(@"scrollView.contentOffset.x:%f",);
}
@end
