我正在開發一個在滾動視圖中顯示大量照片(約650張照片)的應用程序,爲了使此應用程序的功能順利進行,我在scrollView中只添加了三個UIImage,其中一個代表第一頁,第二頁爲當前頁面,第三頁爲下一頁,所以當用戶首次啓動應用程序時,第一個圖像將加載到中間頁面,最後一個圖像將加載到上一頁,第二個圖像將會加載到下一頁,當用戶向右滾動時,中間頁面將加載第二張圖片,上一頁將加載第一張圖片,下一頁將加載第三張圖片等。decelerationRate屬性不起作用
但是當用戶快速滾動滾動視圖的界限會出現,阻止用戶滾動到下一頁,只會博unce。
我的問題是如何使滾動視圖滾動速度更快,使-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
方法調用更快正常
我試圖decelerationRate
屬性如下圖所示的代碼,但我沒有看到任何區別!我正確使用它還是有什麼問題?
在此先感謝
- (void)viewDidLoad
{
scrollView = [[ScrollView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
scrollView.delegate = self;
//scrollView.decelerationRate= UIScrollViewDecelerationRateFast;
[self.view addSubview:scrollView];
scrollView.contentSize = CGSizeMake(960, 416);
pageZero = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
pageOne = [[UIImageView alloc]initWithFrame:CGRectMake(320, 0, 320, 480)];
pageTwo = [[UIImageView alloc]initWithFrame:CGRectMake(640, 0, 320, 480)];
//set array that holds images to be shown
for(int i = 0 ; i < 10 ; i++)
[pages addObject:[NSString stringWithFormat:@"%i.png",i]];
//load photos
[self loadPageWithId:0 onPage:1];
[self loadPageWithId:2 onPage:0];
[self loadPageWithId:1 onPage:2];
//add 3 UIImage objects to the scrollView
[scrollView addSubview:pageZero];
[scrollView addSubview:pageOne];
[scrollView addSubview:pageTwo];
//scroll to the middle page without animation
[scrollView scrollRectToVisible:CGRectMake(320,0,320,416) animated:NO];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(singleTap)];
[self.scrollView addGestureRecognizer:singleTap];
}