UIScrollView,UIPageControl

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIScrollViewDelegate>

@end

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

//组成

//上面 一个scrolview，一个addlable

//中间一个pagecontrol

//下面一个myScrollview一个remove按钮

self.view.backgroundColor=[UIColor greenColor];

/***************UIScrollView*********************************/

UIScrollView *scrolview=[[UIScrollView alloc]initWithFrame:CGRectMake(20, 20, 280, 180)];//高度等于图片高度，宽度小于图片宽度

scrolview.backgroundColor=[UIColor blueColor];

scrolview.contentSize=CGSizeMake(770, 180);//有效的显示范围小于图片，图片不完全显示

UIImageView *imageview=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 770, 180)];

imageview.image=[UIImage imageNamed:@"zhizhu"];

imageview.backgroundColor=[UIColor yellowColor];

[scrolview  addSubview:imageview];

[self.view addSubview:scrolview];

UILabel *addlable=[[UILabel alloc]initWithFrame:CGRectMake(310, 150, 160, 30)];

addlable.text=@"啊,多么美得一幅画！";

[scrolview addSubview:addlable];

scrolview.pagingEnabled=YES;//分页显示的效果

[scrolview setContentOffset:CGPointMake(250, 0) animated:YES];//加载后横向滚动300像素

scrolview.scrollEnabled=YES;//是否可以滚动的属性

scrolview.userInteractionEnabled=YES;//设置交互的属性

scrolview.showsHorizontalScrollIndicator=YES;

scrolview.showsVerticalScrollIndicator=YES;//设置滚动条是否显示

scrolview.bounces=NO;//设置边界的反弹效果，滚到边界将不再滚动

//添加下面的myScrollview

int weigth=700*280/1066;

UIScrollView *myScrollview=[[UIScrollView    alloc]initWithFrame:CGRectMake(50, 250,weigth, 280)];//显示框大小

myScrollview.tag=121;

myScrollview.backgroundColor=[UIColor redColor];

myScrollview.contentSize=CGSizeMake(weigth*5, 280);//有效显示区域

myScrollview.delegate=self;//添加代理

//添加图片组

for (int i=0; i<5; i++) {

UIImageView *imageview1=[[UIImageView    alloc]initWithFrame:CGRectMake(weigth*i, 0, weigth, 280)];

NSString *imageName=[NSString stringWithFormat:@"%d.jpg",i+1];

imageview1.image=[UIImage imageNamed:imageName];

[myScrollview addSubview:imageview1];

}

//最后一页添加一个按钮

UIButton *remove=[UIButton buttonWithType:UIButtonTypeCustom];

remove.frame=CGRectMake(weigth*4+(weigth-100)/2, 220, 100, 35);//设置按钮位置，可以随页面移动

remove.backgroundColor=[UIColor orangeColor];

[remove setTitle:@"开始体验" forState:UIControlStateNormal];

[remove addTarget:self action:@selector(doRemoveScrollView:) forControlEvents:UIControlEventTouchUpInside];//添加事件

[myScrollview addSubview:remove];//添加按钮

myScrollview.pagingEnabled=YES;//按页翻动

[self.view addSubview:myScrollview];

//添加pagecontrol小白点，每个小白点一个页数

UIPageControl *pagecontrol=[[UIPageControl   alloc]initWithFrame:CGRectMake(0, 210, 320, 30)];

pagecontrol.tag=122;

pagecontrol.backgroundColor=[UIColor blueColor];

[pagecontrol addTarget:self action:@selector(pageControlSelector:) forControlEvents:UIControlEventValueChanged];//添加事件

pagecontrol.numberOfPages=5;//控制显示的页数

pagecontrol.currentPage=0;//默认显示第几页；

[self.view addSubview:pagecontrol];

}

//每次scrollView变化后小白点位置变化

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

UIPageControl *pagec=(UIPageControl *)[self.view viewWithTag:122];

CGPoint point1=scrollView.contentOffset;

NSLog(@"%f",(float)point1.x);

[pagec setCurrentPage:point1.x/183];

}

//每次pagecontrol变动后scrollview都跟着变化

-(void)pageControlSelector:(UIPageControl *)sender{

UIScrollView *getscroll=(UIScrollView   *)[self.view viewWithTag:121];//拿到scrollview;知道滚动对象

CGSize size=getscroll.frame.size;

CGRect reck1=CGRectMake((sender.currentPage *size.width), 0, size.width, size.height);

[getscroll scrollRectToVisible:reck1 animated:YES];

}

//按钮的方法

-(void)doRemoveScrollView:(id)sender{

UIView *removeView=[self.view viewWithTag:121];

[removeView removeFromSuperview ];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

}

@end