ios - 由于内存问题，将多张图像从相机胶卷保存到文档目录时崩溃了

当我尝试将10张以上的图像保存到文档目录时，由于内存问题而使其崩溃。

 -(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。我正在从主图像制作3个不同尺寸的图像，并将这些图像保存到文档目录。最后将主图像保存到文档目录。保存完一张图像后，它不会释放内存。我认为这是问题所在。

   -(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;
 }

最佳答案

使用此代码

对于那些在Objective-C中寻找Eddy答案的人。

进口

(void)将Image:(UIImage *)图像插入AlbumNamed:(NSString *)albumName {
//在照片库中获取标题为“albumNmame”的照片集
PHAssetCollection * collection = [self fetchAssetCollectionWithAlbumName:albumName];

if(collection == nil){
//如果我们找不到名为“albumName”的集合，则会在插入图像之前创建它
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^ {
[PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:albumName]；
} completeHandler:^(BOOL成功，NSError * _Nullable错误){
如果(错误!=无){
NSLog(@“将图片插入相册时出错:％@”，error.localizedDescription)；
}

    if (success) {
        //Fetch the newly created collection (which we *assume* exists here)
        PHAssetCollection *newCollection = [self fetchAssetCollectionWithAlbumName:albumName];
        [self insertImage:image intoAssetCollection: newCollection];
    }
}];

}其他{
//如果找到标题为“albumName”的现有AssetCollection，则将其插入其中
[self insertImage:image intoAssetCollection:collection];
}

(PHAssetCollection *)fetchAssetCollectionWithAlbumName:(NSString *)albumName {
PHFetchOptions * fetchOptions = [PHFetchOptions new];
//提供谓词以匹配专辑的标题。
fetchOptions.predicate = [NSPredicate predicateWithFormat:[NSString stringWithFormat:@“title =='％@'”，albumName]]；

//使用获取选项获取相册
PHFetchResult * fetchResult = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum子类型:PHAssetCollectionSubtypeAlbum常规选项:fetchOptions]；

//假设相册存在且没有相册共享其名称，则应该是获取的唯一结果
返回fetchResult.firstObject;

关于ios - 由于内存问题，将多张图像从相机胶卷保存到文档目录时崩溃了，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46701383/