问题描述：

当我尝试保存超过10个图像到文档目录由于内存问题导致崩溃。从相机胶卷保存多个图像到文件目录由于内存问题坠毁

-(void) importArrayDictionary: (NSArray *) arrayDictionary ToFolder: (NSString *) folderDestination { 

_requestOptions = [[PHImageRequestOptions alloc] init]; 
_requestOptions.resizeMode = PHImageRequestOptionsResizeModeExact; 
_requestOptions.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat; 
_requestOptions.synchronous = true; 

//kch-data 
dispatch_queue_t importQueue = dispatch_queue_create("importQueue", NULL); 
dispatch_async(importQueue, ^{ 





    for(PHAsset *asset in arrayDictionary){ 
     //dispatch_async(dispatch_get_main_queue(), ^{ 
     [self createFileWithName: [self generateNewFileName:[self getTypeFromDictionary:asset]] Folder: folderDestination Item:asset]; 
     //}); 

    } 



    //Notify delegate 
    dispatch_async(dispatch_get_main_queue(), ^{ 
     if (self.delegate != nil && [self.delegate respondsToSelector:@selector(pgDataSourceDidFinishImportingFiles:)]) 
      [self.delegate pgDataSourceDidFinishImportingFiles: self]; 
    }); 
}); 
}

这是我用来保存的代码。我从主图像制作3个不同大小的图像，并将这些图像保存到文档目录中。最后将主图像保存到文档目录。完成保存一个图像后，它不释放内存。我认为这是问题。

-(NSString *) createFileWithName: (NSString *) name Folder: (NSString *) folder Item: (PHAsset *) aDicItem {//kch-data 



__block UIImage *_imageThumb; 

// 
PHImageManager *manager = [PHImageManager defaultManager]; 
[manager requestImageForAsset:aDicItem 
        targetSize:PHImageManagerMaximumSize 
        contentMode:PHImageContentModeDefault 
         options:_requestOptions 
       resultHandler:^void(UIImage *image, NSDictionary *info) { 
        _imageThumb = image; 

       }]; 

//UIImage *_imageThumb = [aDicItem objectForKey:@"UIImagePickerControllerOriginalImage"]; 
//Thumb110 
//CGSize size = _imageThumb.size; 
UIImage *thumbImage110 = [_imageThumb thumbnailImage:200 transparentBorder:0 cornerRadius:0 interpolationQuality: kCGInterpolationHigh]; 

//thumbImage110 = [_imageThumb imageWithImage:_imageThumb scaledToFillSize:size]; 
[UIImageJPEGRepresentation(thumbImage110, 0.75) writeToFile: [self getThumbnail110PathForFilename: name] atomically:YES]; 

//Thumb150 
UIImage *thumbImage150 = [_imageThumb thumbnailImage:200 transparentBorder:0 cornerRadius:0 interpolationQuality: kCGInterpolationHigh]; 
[UIImageJPEGRepresentation(thumbImage150, 0.75) writeToFile: [self getThumbnail150PathForFilename: name] atomically:YES]; 
NSString *filePath; 
NSString *folderPath = [self.itmesDir stringByAppendingPathComponent: folder]; 
if([[NSUserDefaults standardUserDefaults] boolForKey:FAKE_MODE]){ 
    folderPath = [self.fakeDir stringByAppendingPathComponent: folder]; 
} 
filePath = [folderPath stringByAppendingPathComponent: name]; 


NSCharacterSet *chss = [NSCharacterSet characterSetWithCharactersInString:@"'#%^&{}[]/~|\?.<,"]; 
NSString *dbFilename = [[name componentsSeparatedByCharactersInSet:chss] componentsJoinedByString:@""]; 

if(aDicItem.mediaType == 1){ 
    [UIImageJPEGRepresentation(_imageThumb, 1.0) writeToFile: filePath atomically:YES]; 

    NSLog(@"file path = %@",filePath); 


} 



//Return file path 
return filePath; 
}

答

使用此代码

对于那些寻找埃迪在Objective-C的答案。

进口

（无效）insertImage：（*的UIImage）图像intoAlbumNamed：（的NSString *）ALBUMNAME {// 中提取具有标题 “albumNmame” PHAssetCollection的照片库的集合* collection = [self fetchAssetCollectionWithAlbumName：albumName];

如果（集合==无）{// 如果我们无法找到一个名为 “ALBUMNAME” 我们将插入图像 [PHPhotoLibrary sharedPhotoLibrary] performChanges之前创建它集合：^ { [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle ：albumName]; （错误！=零）NSLog（@“错误插入图像到相册中：％@”，error.localizedDescription）;}（完成处理程序：^（BOOL成功，NSError * _Nullable错误）{ } }
```
if (success) { 
     //Fetch the newly created collection (which we *assume* exists here) 
     PHAssetCollection *newCollection = [self fetchAssetCollectionWithAlbumName:albumName]; 
     [self insertImage:image intoAssetCollection: newCollection]; 
    } 
}]; 
```
}其他{ //如果我们发现标题为 “ALBUMNAME” 现有AssetCollection，插入它 [自insertImage：图像intoAssetCollection：收藏] } }
（PHAssetCollection *）fetchAssetCollectionWithAlbumName：（的NSString *）ALBUMNAME { PHFetchOptions * FetchOptions的= [PHFetchOptions新]; //提供谓词以匹配相册的标题。 fetchOptions.predicate = [NSPredicate predicateWithFormat：[NSString stringWithFormat：@“title =='％@'”，albumName]];

//使用提取选项 PHFetchResult获取相册* fetchResult = [PHAssetCollection fetchAssetCollectionsWithType：PHAssetCollectionTypeAlbum亚型：PHAssetCollectionSubtypeAlbumRegular选项：类别FetchOptions];

//假设相册存在并且没有相册共享它的名字，它应该是唯一取得的结果 return fetchResult.firstObject; }

从相机胶卷保存多个图像到文件目录由于内存问题坠毁

进口

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