iOS开发之UIPageController

摘要: UIPageController

#import "ViewController.h"

@interface ViewController ()<UIScrollViewDelegate>{

UIScrollView *_scrollView;
UIPageControl *pageControl;
}

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

//1.创建ScrollView对象

_scrollView = [[UIScrollView alloc]
initWithFrame:CGRectMake(0,0,self.view.frame.size.width,400)];

//3.添加内容
CGFloat Y = 0;
CGFloat W = _scrollView.frame.size.width;
CGFloat H = _scrollView.frame.size.height;

UIImage *image1 = [UIImage imageNamed:[NSString stringWithFormat:@"46_7.jpg"]] ;
UIImageView *imageview1 =[[UIImageView alloc]
initWithFrame:CGRectMake(0, 0, W,H )];

imageview1.image = image1;
[_scrollView addSubview:imageview1];

for(int i=1;i<8;i++){

CGFloat X = i * W;
UIImage *image = [UIImage imageNamed:
[NSString stringWithFormat:@"46_%d.jpg",i] ];
UIImageView *imageView = [[UIImageView alloc]
initWithFrame:CGRectMake(X,Y,W,H )];
imageView.image = image;
//显示在内容视图上
[_scrollView addSubview:imageView];
}

UIImage *image2 = [UIImage imageNamed:[NSString stringWithFormat:@"46_1.jpg"]] ;
UIImageView *imageview2 =[[UIImageView alloc]
initWithFrame:CGRectMake(8*W, 0, W,H )];

imageview2.image = image2;
[_scrollView addSubview:imageview2];

//4.添加到界面上;
[self.view addSubview:_scrollView];
//5.设置内容
_scrollView.contentSize = CGSizeMake(9*W, H);

//6.设置代理
_scrollView.delegate = self;

_scrollView.pagingEnabled = YES;

_scrollView.contentOffset = CGPointMake(W, 0);

//=======================pageControl===================
CGFloat PX = 0 ;
CGFloat PH = 20;
CGFloat PY = _scrollView.frame.size.height - PH;
CGFloat PW = _scrollView.frame.size.width;

//1.创建pagecontrol对象
pageControl = [[UIPageControl alloc]
initWithFrame:CGRectMake(PX,PY,PW, PH)];

//2.显示在界面上
[self.view addSubview:pageControl];

//3.设置背景颜色
pageControl.backgroundColor = [UIColor cyanColor];

//4.设置分页数
pageControl.numberOfPages = 7;

//5.设置当前分页
pageControl.currentPage = 0;

//6.没有选中分页的填充颜色
pageControl.pageIndicatorTintColor = [UIColor redColor];

//7.选中的分页的填充颜色
pageControl.currentPageIndicatorTintColor = [UIColor purpleColor];

//8.关闭用户交互
pageControl.userInteractionEnabled = NO;
}

#pragma mark - 停止滚动协议方法
//这个方法可以实现无限轮播
- (void) scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

int page =(int) scrollView.contentOffset.x / scrollView
.frame.size.width - 1;

NSLog(@"page = %d",page);

pageControl.currentPage = page;

if (page > 6) {

[_scrollView setContentOffset:CGPointMake(_scrollView.frame.size.width, 0)];
pageControl.currentPage = 0;
}
if (page < 0) {
[_scrollView setContentOffset:CGPointMake(7*_scrollView.frame.size.width,0)];
pageControl.currentPage = 6;

}

}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end