【发布时间】：2009-12-23 22:53:44
【问题描述】：
我编写的照片查看应用程序有问题。
我有一个内部带有 UINavigationController 的 UITabBarController。 UINavigationController 最初显示一个 UITableView。在选择时，它会推送另一个 UIViewController（个人相册）以及 NSArray 照片。这个控制器包含一个 UIScrollView/UIPageControl，它显示了几个 UIViewControllers，其中有一个 UIImageView。
该应用程序最初运行良好。它为每个相册正确加载每个图像，您可以从导航栏返回。问题是在大约 180 张图像之后，应用程序开始抛出内存警告并最终崩溃并抛出“程序接收信号：“0”。警告：check_safe_call：无法恢复当前帧”，我认为这与内存不足有关。 这非常令人沮丧，因为我已经检查过并且没有泄漏，并且每个 dealloc 都被调用了。 dealloc 方法释放每个保留的属性并将它们设置为 nil。
如果您签入仪器，它会显示在查看每张专辑后内存使用量逐渐上升。它确实释放了一些内存，但不是全部。例如如果相册使用 1MB 显示 0.9MB 可能会被释放。
任何帮助将不胜感激。这是我发布前的最后一期。
编辑：这是基本项目文件的链接。 http://www.mediafire.com/?nztrd1yhzoo
AlbumsViewController（推送单个“albumviewcontroller”）
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSMutableDictionary *dictThisItem = [self.arrAlbums objectAtIndex:[indexPath row]];
NSString *strBand = [dictThisItem objectForKey:@"album"];
NSMutableArray *arrThesePhotos = [[self.arrAlbums objectAtIndex:[indexPath row]] objectForKey:@"photos"];
if (self.albumViewController == nil){
self.albumViewController = [[AlbumViewController alloc] initWithNibName:nil bundle:nil];
}
albumViewController.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:albumViewController animated:YES];
self.albumViewController.arrPhotos = arrThesePhotos;
[albumViewController populateScroller];
}
相册视图控制器
- (void)populateScroller {
imagesScroller.pagingEnabled = YES;
imagesScroller.contentSize = CGSizeMake(imagesScroller.frame.size.width * [self.arrPhotos count], 380);
imagesScroller.showsHorizontalScrollIndicator = NO;
imagesScroller.showsVerticalScrollIndicator = NO;
imagesScroller.scrollsToTop = NO;
imagesScroller.delegate = self;
imagesScroller.backgroundColor = [UIColor blackColor];
[imagesScroller scrollRectToVisible:CGRectMake(0.0, 0.0, 320.0, 480.0) animated:NO];
pageControl.numberOfPages = [self.arrPhotos count];
pageControl.currentPage = 0;
pageControl.backgroundColor = [UIColor blackColor];
NSMutableArray *controllers = [[NSMutableArray alloc] init];
for (int i = 0; i < [self.arrPhotos count]; i++) {
CGRect frame = imagesScroller.frame;
frame.origin.x = frame.size.width * i;
frame.origin.y = 0;
NSString *strImagePath = [[self.arrPhotos objectAtIndex:i] stringByReplacingOccurrencesOfString:@"iPhone" withString:@"iPhone_thumbnail"];
ImageViewController *imageViewController = [ImageViewController alloc];
imageViewController.localImage = YES;
imageViewController.albumViewController = self;
[imageViewController initWithPhotoName:strImagePath];
[controllers addObject:imageViewController];
imageViewController.view.frame = frame;
[imagesScroller addSubview:imageViewController.view];
[imageViewController release];
}
self.viewControllers = controllers;
[controllers release];
}
ImageViewController
- (void)viewDidLoad {
self.navigationShown = NO;
Cache *cache = [[Cache alloc] init];
[cache release];
NSString *strURL = [@"http://www.marklatham.co.uk" stringByAppendingString:self.strThisPhoto];
NSString *strTmpPrefix = (self.localImage) ? @"_tmp_rockphotothumb_" : @"_tmp_rockphotolarge_";
// Cache Paths
NSArray *arrPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *strLocalPath = [[arrPaths objectAtIndex:0] stringByAppendingString:@"/"];
NSString *strPrefix = (strTmpPrefix != nil) ? strTmpPrefix : @"_tmp_rockphotolarge_";
NSMutableArray *arrImagePaths = (NSMutableArray *)[strURL componentsSeparatedByString:@"/"];
// Check cache
NSString *strEntireLocalCache = [strLocalPath stringByAppendingString:[strPrefix stringByAppendingString:[arrImagePaths objectAtIndex:[arrImagePaths count]-1]]];
if ([[NSFileManager defaultManager] fileExistsAtPath:strEntireLocalCache]){
UIImageView *imvImageView = [UIImageView alloc];
UIImage *image = [[UIImage imageWithContentsOfFile:strEntireLocalCache] autorelease];
[imvImageView initWithImage:image];
CGSize imgSize = image.size;
CGFloat fltWidth = imgSize.width;
CGFloat fltHeight = imgSize.height;
// If landscape rotate image
if (fltWidth > fltHeight){
imvImageView.frame = CGRectMake(-80.0, 80.0, 481.0, 320.0);
CGAffineTransform rotate = CGAffineTransformMakeRotation(-1.57079633);
[imvImageView setTransform:rotate];
}else{
imvImageView.frame = CGRectMake(0.0, 0.0, 320.0, 481.0);
}
[self.view addSubview:imvImageView];
[imvImageView release];
}else{
// Data URL Downloading
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
NSData *datImageData = [NSData dataWithContentsOfURL: [NSURL URLWithString:strURL]];
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
[datImageData writeToFile:strEntireLocalCache atomically:YES];
UIImageView *imvImageView = [UIImageView alloc];
UIImage *image = [[UIImage imageWithData: datImageData] autorelease];
[imvImageView initWithImage:image];
CGSize imgSize = image.size;
CGFloat fltWidth = imgSize.width;
CGFloat fltHeight = imgSize.height;
// If landscape rotate image
if (fltWidth > fltHeight){
imvImageView.frame = CGRectMake(-80.0, 80.0, 481.0, 320.0);
CGAffineTransform rotate = CGAffineTransformMakeRotation(-1.57079633);
[imvImageView setTransform:rotate];
}else{
imvImageView.frame = CGRectMake(0.0, 0.0, 320.0, 481.0);
}
[self.view addSubview:imvImageView];
[imvImageView release];
}
}
【问题讨论】：
标签： iphone crash uiscrollview uiimageview dealloc