技术问题发到问答：我知道，我仍旧要在论坛继续发布问题
大大们，我用ALAssetsLibrary把照片库里的照片copy到app的Documents下面，总是到一百多张后就出现内存警告，然后crash，请帮忙看看是哪里的问题，不胜感激！！！
dispatch_async(dispatch_get_global_queue(0, 0), ^{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
[pool release];
ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror){
NSLog(@"error occour =%@", [myerror localizedDescription]);
};
ALAssetsGroupEnumerationResultsBlock groupEnumerAtion = ^(ALAsset *result, NSUInteger index, BOOL *stop){
if (result!=NULL) {
//we can get all the things in the defaultRepresentation such as size info in UTI
}
//just fetching photos
if ([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {
//把image copy 到Documents/DMS/Photo文件夹下面
ALAssetRepresentation *rep = [result defaultRepresentation];
CGImageRef iref = [rep fullScreenImage];
NSString *tt = [rep filename];
if (iref) {
UIImage *image = [[UIImage alloc]init];
image = [UIImage imageWithCGImage:iref];
NSData *imageData = [[NSData alloc]init];
imageData = UIImagePNGRepresentation(image);
if(image==nil){
NSLog(@"---------------------the imageData is nil");
}else{
NSString *fullPath = [pathPhoto stringByAppendingFormat:@"/%@.png",tt];
NSLog(@"fullPath================%@",fullPath);
if (![[NSFileManager defaultManager] fileExistsAtPath:fullPath]){
[[NSFileManager defaultManager] createFileAtPath:fullPath contents:imageData attributes:nil];
NSLog(@"Creat image file fullPath================%@",fullPath);
}
}
[image release];
[imageData release];
}
}
};
ALAssetsLibraryGroupsEnumerationResultsBlock
libraryGroupsEnumeration = ^(ALAssetsGroup* group, BOOL* stop){
if (group == nil)
{
return;
}
if (group!=nil) {
[group enumerateAssetsUsingBlock:groupEnumerAtion];
}
NSLog(@"finish--------------------------------------------");
//NSLog(@"photoUrlListArray=========%@",photoUrlListArray);
//[self performSelectorOnMainThread:@selector(exportPhotoUrls:) withObject:nil waitUntilDone:YES];
//[photoUrlListArray release];
return;
};
ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];
[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos
usingBlock:libraryGroupsEnumeration
failureBlock:failureblock];
[library release];
});
奋斗＋努力＝？？？
引用siam级别: 侠客
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发表于: 2013-01-29 16:29 发自: Web Page
回 楼主(zuo198599999) 的帖子
你的代码居然没有crash，这才是让我很差异的地方，UIImage *image = [[UIImage alloc]init];
image = [UIImage imageWithCGImage:iref];
就拿这两句来做例子说吧，你断点看一下，执行完第一句的时候，image的内存地址是多少，执行完第二句的时候，你再看一下image的内存地址，你比较一下两次的内存地址。你就明白问题的原因所在了
引用zuo198599999级别: 精灵王
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发表于: 2013-01-29 17:33 发自: Web Page
我原来是这样的UIImage *image = [[UIImage alloc]initWithCGImage:iref];
不过这样到80张图片就Received memory warning.然后crash
求解惑
奋斗＋努力＝？？？
引用zuo198599999级别: 精灵王
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发表于: 2013-01-29 17:35 发自: Web Page
回 1楼(siam) 的帖子
我原来是这样的UIImage *image = [[UIImage alloc]initWithCGImage:iref];
不过这样到80张图片就Received memory warning.然后crash
求解惑
