- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor yellowColor];
// Do any additional setup after loading the view.
//UIScrollView 的使用
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(20, 20, 335, 607)];
//指定一個滾動的範圍
//寫成0, 或者是小於自己設定的範圍, 可以控制滾動的形式(上下/左右)
scrollView.contentSize = CGSizeMake(1000, 1000);
//圖片的大小, 恢復原狀
scrollView.zoomScale = 1;
//scrollView滾動到的位置
//本質上, scrollView的左上角的點, 相對於自己座標系的位置
// scrollView.contentOffset = CGPointMake(100, 100);
//按頁翻, 按照scrollView的大小, 一翻翻一頁
scrollView.pagingEnabled = YES;
//控制scrollView是不是可以滾動
scrollView.scrollEnabled = YES;
//返回頂部, 點擊狀態欄, 返回頂部
scrollView.scrollsToTop = YES;
//關閉邊緣的彈動效果, 不能彈出邊緣, 下拉刷新, 一定要設置爲YES
//scrollView.bounces = NO;
//顯示/關閉 橫向滾動條
//scrollView.showsHorizontalScrollIndicator = NO;
//顯示/關閉 縱向滾動條
//scrollView.showsVerticalScrollIndicator = NO;
scrollView.delegate = self;
//scrollView的方法縮小
//1, 設置scrollView的縮放範圍
scrollView.maximumZoomScale = 2;
scrollView.minimumZoomScale = 0.5;
scrollView.backgroundColor = [UIColor purpleColor];
[self.view addSubview:scrollView];
[scrollView release];
//添加一個圖片
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 335, 300)];
imageView.image = [UIImage imageNamed:@"3.jpg"];
[scrollView addSubview:imageView];
[imageView release];
//指示當前在第幾頁
UIPageControl *pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(20, 637, 335, 30)];
pageControl.backgroundColor = [UIColor redColor];
//設置總共有多少頁
pageControl.numberOfPages = 10;
//當前的page的顏色(就是當前的點的顏色)
pageControl.currentPageIndicatorTintColor = [UIColor cyanColor];
//沒選中點的顏色
pageControl.pageIndicatorTintColor = [UIColor yellowColor];
[self.view addSubview:pageControl];
[pageControl release];
//pageCrotrol的事件綁定是valueChanged
[pageControl addTarget:self action:@selector(pageAction:) forControlEvents:UIControlEventValueChanged];
}
- (void)pageAction:(UIPageControl *)pageControl
{
NSLog(@"換頁");
NSLog(@"%ld", pageControl.currentPage);
}
//系統協議的標記(寫到協議方法的時候, 進行標記)
#pragma mark - scrollView 的協議方法
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
//判斷偏移量
NSLog(@"%@",NSStringFromCGPoint(scrollView.contentOffset));
NSLog(@"偏移值改變");
}
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
NSLog(@"當scrollView開始拖拽的時候");
}
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
//當結束拖拽的時候, 滾動還會進行一會
NSLog(@"當scrollView已經結束拖拽的時候");
}
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
{
//將要開始減速
NSLog(@"scrollView將要開始減速");
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
//已經結束減速
NSLog(@"scrollView已經結束減速");
}
- (UIView*)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
//scrollView方法縮小(只能指定一個)
//2. 指定一個scrollView的子視圖, 隨着scrollView縮放
//獲取第一個子視圖
UIView *view = [scrollView.subviews firstObject];
return view;
}