滚动 播放
contentSize //定义内容区域大小,决定是否能滚动
contentOffset //食欲左上角距离坐标远点的偏移量
scrollsToTop //滑动都顶部(点状态条的时候)
pagingEnabled //是否能整屏翻动
bounces //边界是否回弹
//在这里我们打印一下滚动视图的contenSize,来看一下是否在缩放时,滚动视图的contenSize发生了改变
- (void)scrollViewDidZoom:(UIScrollView *)scrollView NS_AVAILABLE_IOS(3_2);
{
NSLog(@"%@",NSStringFromCGSize(scrollView.contentSize));
// scrollView.contentSize = CGSizeMake(1150, 1000);
}
//viewDidLoad中的代码
#pragma mark ----------设置滚动视图的滚动-----
UIScrollView *sView = [[UIScrollView alloc] initWithFrame:CGRectMake(10, 20, 350, 600)];
sView.backgroundColor = [UIColor grayColor];
sView.contentSize = CGSizeMake(1000, 800);//contentsize这个属性决定了滚动视图能显示内容的区域的大小,也是能滚动区域的大小.
sView.contentOffset = CGPointMake(250, 10); //视图左上角距离坐标原点的偏移量
sView.scrollEnabled = YES;//让scrollView回到顶部
// sView.pagingEnabled = YES;//默认为NO,是否整屏翻动 控制的时上下左右
sView.bounces = YES;//设置当前活动边界的时候是否回弹,默认是yes;
// sView.alwaysBounceVertical = YES; //垂直 上下回弹
// sView.alwaysBounceHorizontal = YES; //左右水平回弹
//增加滑动区域,上下左右多处多少的活动区域
// sView.contentIn
// set = UIEdgeInsetsMake(110, 10, 10, 10);
#pragma mark ----------设置滚动的视图缩放属性-------
sView.maximumZoomScale = 10.0; //指定最大的放大倍数
sView.minimumZoomScale = 0.5; //设置最小的缩小倍数,设定倍数之后是 不能进行缩放的,必须指定缩放的是谁
sView.delegate = self;//将视图控制器指定为滚动视图的代理对象,去负责指定需要缩放
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(250, 10, 150, 100)];
label.userInteractionEnabled = YES; //交互 与滑动无关的
label.text = @"滚动把
牛宝宝";
label.numberOfLines = 0;//断行
label.backgroundColor = [UIColor whiteColor];
[sView addSubview:label];
[label release];
[self.view addSubview:sView];
[sView release];
UIPageControl
currentPage //当前页
numberOfPages //指定页面的个数
#pragma mark ----------创建一个UIPageControl对象并且配置--------------
UIPageControl *page = [[UIPageControl alloc] initWithFrame:CGRectMake(25, 630, 300, 20)];
page.numberOfPages = 5; //给定多少页
page.currentPage = 2; //指定初始页,必须在给定页数之后,不然不会发生改变
page.backgroundColor = [UIColor blackColor];
[page addTarget:self action:@selector(aa:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:page];
UIScrollView UIPageControl 实现轮回播放
//.h文件
#import <UIKit/UIKit.h>
@interface RootViewController : UIViewController <UIScrollViewDelegate>
@property (nonatomic,retain) UIPageControl *page;
@property (nonatomic,retain) UIScrollView *sView;
@property (nonatomic,retain) UILabel *firstLabel;
@end
//.m文件中
#import "RootViewController.h"
@interface RootViewController ()
@end
@implementation RootViewController
-(void)dealloc
{
[_firstLabel release];
[_sView release];
[_page release];
[super dealloc];
}
//在滚动方法中实现最后一张与第一张的临界翻转
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGPoint offset = scrollView.contentOffset;
CGFloat width = self.view.frame.size.width;
if (offset.x + width > scrollView.contentSize.width ) {
[scrollView setContentOffset:CGPointMake(0, 0) animated:NO];
}
else if(offset.x < 0 ){
[scrollView setContentOffset:CGPointMake(10*width, 0) animated:NO];
}
}
//在滚动视图停止滚动的时候,改变pagecontroltPa的currenge的值
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
//获取当前滚动视图的偏移量
CGPoint offset = scrollView.contentOffset;
//计算当前是第几页
NSInteger page = offset.x / self.view.frame.size.width;
// if (page == 9) {
// _page.currentPage = 0;
// }
// else {
// _page.currentPage = page - 1;
// }
_page.currentPage = page - 1 < 0 ? 9 :page - 1;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
UIScrollView *sView = [[UIScrollView alloc] initWithFrame:[UIScreen mainScreen].bounds];
CGFloat width = self.view.frame.size.width;
CGFloat height = self.view.frame.size.height;
sView.contentSize = CGSizeMake(width*11, height);
sView.pagingEnabled = YES;
_sView.showsHorizontalScrollIndicator = NO;
sView.delegate = self;
_sView =sView;
//为了让第一张图显示为0,必须重新设置滚动视图的偏移量
_sView.contentOffset = CGPointMake(width, 0);
[self.view addSubview:sView];
NSArray *arrText = @[@"我是第一个",@"我是第二个",@"谁是第三个",@"你是第四个",@"他是第五个",@"第六个出来",@"喝了七个",@"再来八个",@"九九一杯酒",@"十全十美"];
_firstLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, width, height)];
_firstLabel.text = @"十全十美";
_firstLabel.backgroundColor = [UIColor colorWithRed:arc4random()%256/255.0 green:arc4random()%256/255.0 blue:arc4random()%256/255.0 alpha:1.0];
_firstLabel.font = [UIFont boldSystemFontOfSize:30];
_firstLabel.textAlignment = NSTextAlignmentCenter;
[_sView addSubview:_firstLabel];
for (int i = 0; i < 10; i++) {
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(width*(i+1), 0, width, height)];
if (i == 9) {
label.backgroundColor = _firstLabel.backgroundColor;
}
else{
label.backgroundColor = [UIColor colorWithRed:arc4random()%256/255.0 green:arc4random()%256/255.0 blue:arc4random()%256/255.0 alpha:1.0];
}
label.text = arrText[i];
label.font = [UIFont boldSystemFontOfSize:30];
label.textAlignment = NSTextAlignmentCenter;
[sView addSubview:label];
[label release];
}
UIPageControl *page = [[UIPageControl alloc] initWithFrame:CGRectMake(0, height-50, width, 30)];
// page.backgroundColor = [UIColor blackColor];
page.numberOfPages = 10;
page.pageIndicatorTintColor = [UIColor redColor];
page.currentPageIndicatorTintColor = [UIColor blackColor];
page.currentPage = 0;
[self.view addSubview:page];
_page = page;
[page release];
[sView release];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
小技巧
self.automaticallyAdjustsScrollViewInsets = NO;