#import "ViewController.h"
@interface ViewController ()<UIScrollerViewDelegate>
{
UIScrollView *scroll; //滚动视图
NSArray *arr; //数组
UIPageControl *p; //分页控件
NSInteger pagecount; //记录页数
NSTimer *timer; //计时器
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//获取屏幕的宽
float width = self.view.frame.size.width;
//获取屏幕的高
float height = self.view.frame.size.height;
//创建滚动视图
scroll = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, width, height)];
float x = 0.0;
for (int i = 0 ; i < 4; i++ )
{
//创建图片框
UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(x, 0, width, height)];
//创建图片数组
arr = @[[UIImage imageNamed:@"1.jpg"],[UIImage imageNamed:@"2.jpg"],[UIImage imageNamed:@"3.jpg"],[UIImage imageNamed:@"4.jpg"]];
//将图片添加到图片框上
imgView.image = arr[i];
//将图片框添加到滚动视图上
[scroll addSubview:imgView];
//叠加
x += width;
}
//设置滚动视图的大小
scroll.contentSize = CGSizeMake(width * 4, height);
//去掉弹簧效果
scroll.bounces = NO;
//隐藏滚动条
scroll.showsHorizontalScrollIndicator = NO;
//设置按页滚动
scroll.pagingEnabled = YES;
scroll.delegate = self;
//将滚动视图添加到视图上
[self.view addSubview:scroll];
//创建分页控件
p = [[UIPageControl alloc]initWithFrame:CGRectMake((width - 50)/2, 680, 100, 30)];
//设置页码个数
p.numberOfPages = 4;
//设置页码初始页
p.currentPage = 0;
//设置页码颜色
p.pageIndicatorTintColor = [UIColor redColor];
//设置当前页码的颜色
p.currentPageIndicatorTintColor = [UIColor cyanColor];
//将分页控件添加到视图上
[self.view addSubview:p];
//记录当前页面的图片页数
pagecount = p.currentPage;
//创建定时器
timer = [NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(scroll) userInfo:nil repeats:YES];
}
//滚动方法
-(void)scroll
{
pagecount++;
if (pagecount >= arr.count)
{
pagecount = 0;
}
//设置滚动视图的偏移量
[scroll setContentOffset:CGPointMake(pagecount * scroll.frame.size.width, 0) animated:YES];
}
//在滚动的时候调用此方法
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
//当前的偏移量
CGPoint point = scrollView.contentOffset;
//获取当前所在的位置
p.currentPage = point.x / scrollView.frame.size.width;
//创建立即体验按钮
UIButton *btn = [[UIButton alloc]init];
//判断滚动到第四页的时候 停止计时器 显示立即体检按钮
if (p.currentPage == 3)
{
//停止定时器
[timer invalidate];
btn.frame = CGRectMake(110, 600, 200, 40);
//设置按钮背景颜色
btn.backgroundColor = [UIColor clearColor];
//设置边框
btn.layer.borderWidth = 1;
btn.layer.backgroundColor = [UIColor greenColor].CGColor;
[btn setTitle:@"立即体验" forState:UIControlStateNormal];
//设置文字颜色
[btn setTitleColor:[UIColor orangeColor] forState:UIControlStateNormal];
//设置圆角
btn.layer.cornerRadius = 8;
btn.layer.masksToBounds = YES;
//给按钮添加点击事件
[btn addTarget:self action:@selector(anniu) forControlEvents:UIControlEventTouchUpInside];
//将按钮添加到视图上
[self.view addSubview:btn];
//设置禁止用户交互
scrollView.userInteractionEnabled = NO;
}
}
-(void)anniu
{
NSLog(@"走起");
}
//隐藏状态栏
-(BOOL)prefersStatusBarHidden
{
return YES;
}
@end
