#import"ViewController.h"
@interfaceViewController()
//滑动视图UIScrollView,自带了可滑动功能
@property(nonatomic,strong)
UIScrollView*scrollView;
@end
@implementationViewController
#define screenWidth[UIScreen mainScreen].bounds.size.width
#define screenHeight[UIScreen mainScreen].bounds.size.height
- (void)viewDidLoad {
[superviewDidLoad];
//创建初始化滑动视图
self.scrollView= [[UIScrollViewalloc]initWithFrame:[UIScreenmainScreen].bounds];
for(NSIntegeri =0; i <6; i++) {
//根据i循环创建UIImageView，在添加到滑动视图scrollView上面
UIImageView*imageView = [[UIImageViewalloc]initWithFrame:CGRectMake(i*screenWidth,0,screenWidth,screenHeight)];
NSString*imageName =nil;
if(i==5)
{
imageName =@"1.jpg";
}
else{
imageName = [NSStringstringWithFormat:@"%ld.jpg",i+1];
}
//加载响应图片
UIImage*image = [UIImageimageNamed:imageName];
//设置图片
imageView.image= image;
//将imageview添加到滑动视图上面
[self.scrollViewaddSubview:imageView];
}
//添加滑动视图到屏幕上
[self.viewaddSubview:self.scrollView];
//设置滑动试图的滑动区域contenSize
self.scrollView.contentSize=CGSizeMake(6*screenWidth,screenHeight);
//整屏翻转
self.scrollView.pagingEnabled=YES;
//边界回弹
self.scrollView.bounces=NO;
//设置代理，代理是负责监听滑动试图整个滑动过程的
self.scrollView.delegate=self;
}
//滑动视图滑动的时候调用
- (void)scrollViewDidScroll:(UIScrollView*)scrollView;{
//contene)ffset是访问到了滑动视图的偏移量，包含了X和Y轴的偏移量
//sentConteneOffset:animated:
//{NSLog(@"偏移量,x = %f,y = %f",scrollView.contentOffset.x,scrollView.contentOffset.y);
}
//scrollView结束减速（停止）
- (void)scrollViewDidEndDecelerating:(UIScrollView*)scrollView
{
//判断是否为最后一张
NSIntegerindex = scrollView.contentOffset.x/screenWidth;
//==5表示最后一张
if(index==5) {
[scrollViewsetContentOffset:CGPointMake(0,0)animated:NO];
}
//开启一个计时器
//TimeInterval:时间间隔
//每隔一段时间间隔，target会去执行selector这个方法
[NSTimer
scheduledTimerWithTimeInterval:2target:selfselector:@selector(turnToNextImage)userInfo:nilrepeats:YES];
}
//定时器触发的方法；跳转到下一张
-(void)turnToNextImage
{
//获取当前第几张图片
NSIntegerindex =self.scrollView.contentOffset.x/screenWidth;
//跳转到下一张(设置偏移量)
[self.scrollViewsetContentOffset:CGPointMake((index+1)*screenWidth,0)animated:YES];
}
//滑动结束时候调用
- (void)scrollViewDidEndScrollingAnimation:(UIScrollView*)scrollView;
{
//现获取当前下标
NSIntegerindex =self.scrollView.contentOffset.x/screenWidth;if(index==5) {
[scrollViewsetContentOffset:CGPointMake(0,0)animated:NO];
}
}
- (void)didReceiveMemoryWarning{
[superdidReceiveMemoryWarning];
// Dispose of any resources that can be
recreated.
}
@end
cB
