UIScrollView
UIScrollView基本用法和代理方法
- (
void
)viewDidLoad
{
[super viewDidLoad];
scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
scrollView.backgroundColor = [UIColor redColor];
// 是否支持滑动最顶端
// scrollView.scrollsToTop = NO;
scrollView.delegate = self;
// 设置内容大小
scrollView.contentSize = CGSizeMake(320, 460*10);
// 是否反弹
// scrollView.bounces = NO;
// 是否分页
// scrollView.pagingEnabled = YES;
// 是否滚动
// scrollView.scrollEnabled = NO;
// scrollView.showsHorizontalScrollIndicator = NO;
// 设置indicator风格
// scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
// 设置内容的边缘和Indicators边缘
// scrollView.contentInset = UIEdgeInsetsMake(0, 50, 50, 0);
// scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 50, 0, 0);
// 提示用户,Indicators flash
[scrollView flashScrollIndicators];
// 是否同时运动,lock
scrollView.directionalLockEnabled = YES;
[self.view addSubview:scrollView];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 200, 320, 40)];
label.backgroundColor = [UIColor yellowColor];
label.text = @
"学习scrolleview"
;
[scrollView addSubview:label];
[label release];
}
#pragma mark -
/*
// 返回一个放大或者缩小的视图
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
}
// 开始放大或者缩小
- (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:
(UIView *)view
{
}
// 缩放结束时
- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale
{
}
// 视图已经放大或缩小
- (void)scrollViewDidZoom:(UIScrollView *)scrollView
{
NSLog(@"scrollViewDidScrollToTop");
}
*/
// 是否支持滑动至顶部
- (
BOOL
)scrollViewShouldScrollToTop:(UIScrollView *)scrollView
{
return
YES;
}
// 滑动到顶部时调用该方法
- (
void
)scrollViewDidScrollToTop:(UIScrollView *)scrollView
{
NSLog(@
"scrollViewDidScrollToTop"
);
}
// scrollView 已经滑动
- (
void
)scrollViewDidScroll:(UIScrollView *)scrollView
{
NSLog(@
"scrollViewDidScroll"
);
}
// scrollView 开始拖动
- (
void
)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
NSLog(@
"scrollViewWillBeginDragging"
);
}
// scrollView 结束拖动
- (
void
)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(
BOOL
)decelerate
{
NSLog(@
"scrollViewDidEndDragging"
);
}
// scrollView 开始减速(以下两个方法注意与以上两个方法加以区别)
- (
void
)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
{
NSLog(@
"scrollViewWillBeginDecelerating"
);
}
// scrollview 减速停止
- (
void
)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
NSLog(@
"scrollViewDidEndDecelerating"
);
}
@interface RootViewController : UIViewController<UIScrollViewDelegate>
{
UIScrollView *_scrollView;
NSMutableArray *slideImages;
UIPageControl *_page;
}
@end
#import "RootViewController.h"
@interface RootViewController ()
@end
@implementation RootViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if
(self) {
// Custom initialization
}
return
self;
}
- (
void
)viewDidLoad
{
[super viewDidLoad];
_scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 20, 320, 240)];
_scrollView.bounces = NO;
_scrollView.pagingEnabled = YES;
_scrollView.delegate = self;
_scrollView.contentOffset = CGPointMake(320, 0);
_scrollView.contentSize = CGSizeMake(1920,240);
_scrollView.showsVerticalScrollIndicator =NO;
_scrollView.showsHorizontalScrollIndicator = NO;
_scrollView.userInteractionEnabled = YES;
[self.view addSubview:_scrollView];
[_scrollView release];
slideImages = [[NSMutableArray alloc]initWithObjects:@
"1.jpeg"
,@
"2.jpg"
,@
"3.jpeg"
,@
"4.jpeg"
, nil];
UIImageView *imageView = [[UIImageView alloc]
initWithImage:[UIImage imageNamed:[slideImages objectAtIndex:([slideImages count]-1)]]];
imageView.frame = CGRectMake(0, 0, 320, 240);
[_scrollView addSubview:imageView];
[imageView release];
for
(
int
i = 0;i<[slideImages count];i++) {
//loop this bit
UIImageView *imageView = [[UIImageView alloc]
initWithImage:[UIImage imageNamed:[slideImages objectAtIndex:i]]];
imageView.frame = CGRectMake(320*i+320, 0, 320, 240);
imageView.userInteractionEnabled = YES;
[_scrollView addSubview:imageView];
[imageView release];
}
imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[slideImages objectAtIndex:0]]];
imageView.frame = CGRectMake(320*5, 0, 320, 240);
[_scrollView addSubview:imageView];
[imageView release];
_page = [[UIPageControl alloc]initWithFrame:CGRectMake(240, 230, 70, 30)];
_page.numberOfPages = 4;
_page.currentPage = 0;
// _page.backgroundColor = [UIColor grayColor];
[_page addTarget:self action:@selector(pageAction) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:_page];
[_page release];
// Do any additional setup after loading the view.
}
- (
void
)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
int
currentPage = (_scrollView.contentOffset.x - _scrollView.frame.size.width
/ ([slideImages count]+2)) / _scrollView.frame.size.width + 1;
NSLog(@
"%d"
,currentPage);
if
(currentPage==0) {
[_scrollView scrollRectToVisible:CGRectMake(320*4, 0, 320, 240) animated:NO];
}
else
if
(currentPage==([slideImages count]+1)) {
//如果是最后+1,也就是要开始循环的第一个
[_scrollView scrollRectToVisible:CGRectMake(320, 0, 320, 240) animated:NO];
}
}
- (
void
)scrollViewDidScroll:(UIScrollView *)sender
{
int
page = _scrollView.contentOffset.x/320-1;
_page.currentPage = page;
}
-(
void
)pageAction
{
int
page = _page.currentPage;
[_scrollView setContentOffset:CGPointMake(320 * (page+1), 0)];
}
- (
void
)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (
void
)dealloc {
[slideImages release];
[super dealloc];
}
@end
posted on 2015-11-05 11:46 阿斯顿发-斯语iOS 阅读(143) 评论(0) 编辑 收藏 举报