ios - 如何从ALASSET照片库中获取第一张(最新)照片？

Question

通过编程从iOS照片库获取最新照片是否有技巧？

我知道我可以按日期搜索，但是我必须每隔一微秒进行一次扫描，以便进行某种比较以准确地找到它。

有没有人做过这个或任何想法？

Answer 1

我之前采取的一种方法:

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];

[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {

[group setAssetsFilter:[ALAssetsFilter allPhotos]];

[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *alAsset, NSUInteger index, BOOL *innerStop) {

    if (alAsset) {
        ALAssetRepresentation *representation = [alAsset defaultRepresentation];
        UIImage *latestPhoto = [UIImage imageWithCGImage:[representation fullScreenImage]];

        *stop = YES; *innerStop = YES;

    }
}];
} failureBlock: ^(NSError *error) {
NSLog(@"Error : %@", [error localisedDescription]);
}];