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我想滚动通过用户在线相册下载的图像(如在Facebook的iPhone应用程序),因为我无法加载所有图像到内存中,一次加载3个(上一个,目前&下一个)。然后从uiscroller子视图中删除图像(prev-1)&图像(下一个+1)。 我的逻辑正常工作在模拟器,但与此错误的设备出现故障: [CALayer的保留]:发送到释放实例 消息可能是什么问题,下面 是我的代码示例我如何滚动通过IPhone中的UIScrollView 100张照片
- (void)scrollViewDidEndDecelerating:(UIScrollView *)_scrollView
{
pageControlIsChangingPage = NO;
CGFloat pageWidth = _scrollView.frame.size.width;
int page = floor((_scrollView.contentOffset.x - pageWidth/2)/pageWidth) + 1;
if (page>1 && page<=(pageControl.numberOfPages-3)) {
[self removeThisView:(page-2)];
[self removeThisView:(page+2)];
}
if (page>0) {
NSLog(@"<< PREVIOUS");
[self showPhoto:(page-1)];
}
[self showPhoto:page];
if (page<(pageControl.numberOfPages-1)) {
//NSLog(@"NEXT >>");
[self showPhoto:page+1];
NSLog(@"FINISHED LOADING NEXT >>");
}
}
-(void) showPhoto:(NSInteger)index
{
CGFloat cx = scrollView.frame.size.width*index;
CGFloat cy = 40;
CGRect rect=CGRectMake(0, 0,320, 480);
rect.origin.x = cx;
rect.origin.y = cy;
AsyncImageView* asyncImage = [[AsyncImageView alloc] initWithFrame:rect];
asyncImage.tag = 999;
NSURL *url = [NSURL URLWithString:[pics objectAtIndex:index]];
[asyncImage loadImageFromURL:url place:CGRectMake(150, 190, 30, 30) member:memberid isSlide:@"Yes" picId:[picsIds objectAtIndex:index]];
[scrollView addSubview:asyncImage];
[asyncImage release];
}
- (void) removeThisView:(NSInteger)index
{
if (index<[[scrollView subviews] count] && [[scrollView subviews] objectAtIndex:index]!=nil) {
if ([[[scrollView subviews] objectAtIndex:index] isKindOfClass:[AsyncImageView class]] || [[[scrollView subviews] objectAtIndex:index] isKindOfClass:[UIImageView class]]) {
[[[scrollView subviews] objectAtIndex:index] removeFromSuperview];
}
}
}
为了记录它在模拟器中工作正常,但不是iPhone设备本身。 任何想法将不胜感激。 欢呼声, 弗雷德。