ALAssetsLibrary获取相机胶卷

Question

我使用 ALAssetsLibrary 枚举所有资源组。

以下是代码：

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

void (^enumerate)(ALAssetsGroup *, BOOL *) = ^(ALAssetsGroup *group, BOOL *stop)
{
    if (group == nil)
    {
        // enumerated all albums..
    }

    // I hot to check if group is Camera Roll ?

};

[library enumerateGroupsWithTypes:ALAssetsGroupAll
                       usingBlock:enumerate
                     failureBlock:nil];

如何检查当前枚举是否为CameraRoll？ 编辑：我测试过，它总是最后一个，使用这个枚举。但我不确定是否有规则，是否有我错过的参考资料？

- B.S.

Answer 1

在枚举资产库时，使用ALAssetsGroupSavedPhotos来从相机卷中获取照片：

[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos
                       usingBlock:enumerate
                     failureBlock:nil];

为了检测当前所属的用户组，请执行以下操作：

if ([[group valueForProperty:@"ALAssetsGroupPropertyType"] intValue] == ALAssetsGroupSavedPhotos)
{
    NSLog(@"Camera roll");
}

- Sergey Kuryanov

---

我看到了这个解决方案，但我需要知道我的枚举组中哪一个是相机胶卷，请查看代码。 - B.S.

Answer 2

    imageArray = [[NSArray alloc] init];
    NSMutableArray*mutableArray =[[NSMutableArray alloc]init];

    NSMutableArray* assetURLDictionaries = [[NSMutableArray alloc] init];

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

void (^enumerate)(ALAssetsGroup *, BOOL *) = ^(ALAssetsGroup *group, BOOL *stop)
{
    if ([[group valueForProperty:@"ALAssetsGroupPropertyType"] intValue] == ALAssetsGroupSavedPhotos)
    {
        NSLog(@"Camera roll");
        [group enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) {
            ALAssetRepresentation *rep = [result defaultRepresentation];
            NSLog(@"Asset Name ----> %@",rep.filename);


        }];
    }
    // I hot to check if group is Camera Roll ?

};

 [library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos
                       usingBlock:enumerate
                     failureBlock:nil];

- user3312680