Photos(PHAssetCollection)

PHAssetCollection是PHCollection的子类，代表照片或视频的集合，可以理解为系统“照片”App里面的相册或者其重要时刻。

1 获取资产集合

/// 通过唯一标示符获取资产集合
///
/// - parameter identifiers : 对应PHAsset的localIdentifier属性
/// - parameter options : PHFetchOptions
///
/// - returns: PHFetchResult<PHAssetCollection>
public class func fetchAssetCollectionsWithLocalIdentifiers(identifiers: [String], options: PHFetchOptions?) -> PHFetchResult

/// 通过资产类型获取资产集合
///
/// - parameter type : PHAssetCollectionType 资产集合的类型
/// - parameter subtype : PHAssetCollectionSubtype 资产集合的具体类型
/// - parameter options : PHFetchOptions
///
/// - returns: PHFetchResult<PHAssetCollection>
public class func fetchAssetCollectionsWithType(type: PHAssetCollectionType, subtype: PHAssetCollectionSubtype, options: PHFetchOptions?) -> PHFetchResult

// Smart Albums are not supported, only Albums and Moments
/// 通过PHAsset获取其资产集合，只支持Albums和Moments
///
/// - parameter asset : PHAsset 资产
/// - parameter type : PHAssetCollectionType 资产集合的具体类型
/// - parameter options : PHFetchOptions
///
/// - returns: PHFetchResult<PHAssetCollection>
public class func fetchAssetCollectionsContainingAsset(asset: PHAsset, withType type: PHAssetCollectionType, options: PHFetchOptions?) -> PHFetchResult

/// 通过ALAssetGroup的ALAssetsGroupPropertyURL获取资产集合
///
/// - parameter assetGroupURLs : [NSURL]对应ALAssetGroup's ALAssetsGroupPropertyURL
/// - parameter options : PHFetchOptions
///
/// - returns: PHFetchResult<PHAssetCollection>
public class func fetchAssetCollectionsWithALAssetGroupURLs(assetGroupURLs: [NSURL], options: PHFetchOptions?) -> PHFetchResult

/// 通过PHCollectionList获取其对应的重要时刻的资产集合
///
/// - parameter momentList : PHCollectionList
/// - parameter options : PHFetchOptions
///
/// - returns: PHFetchResult<PHAssetCollection>
public class func fetchMomentsInMomentList(momentList: PHCollectionList, options: PHFetchOptions?) -> PHFetchResult

/// 获取所有重要时刻的资产集合
///
/// - parameter options : PHFetchOptions
///
/// - returns: PHFetchResult<PHAssetCollection>
public class func fetchMomentsWithOptions(options: PHFetchOptions?) -> PHFetchResult

2 获取集合元数据

/// 集合类型
public var assetCollectionType: PHAssetCollectionType { get }
/// 集合详细类型
public var assetCollectionSubtype: PHAssetCollectionSubtype { get }

/// 内部资产数量
public var estimatedAssetCount: Int { get }

/// 开始时间 
public var startDate: NSDate? { get }
/// 结束时间
public var endDate: NSDate? { get }

/// 定位的位置
public var approximateLocation: CLLocation? { get }
/// 定位的位置名称
public var localizedLocationNames: [String] { get }

3 创建临时资产集合

/// 通过[PHAsset]集合生成临时PHAssetCollection
///
/// - parameter assets : [PHAsset]
/// - parameter title : 资产集合的名
///
/// - returns: PHAssetCollection
public class func transientAssetCollectionWithAssets(assets: [PHAsset], title: String?) -> PHAssetCollection

/// 通过PHFetchResult结果集生成临时PHAssetCollection
///
/// - parameter fetchResult: PHFetchResult
/// - parameter title : 资产集合的名
///
/// - returns: PHAssetCollection
public class func transientAssetCollectionWithAssetFetchResult(fetchResult: PHFetchResult, title: String?) -> PHAssetCollection

 

其他

源代码

Swift

参考资料

Photos Framework Reference

PHObject Class Reference

PHCollection Class Reference

PHAssetCollection Class Reference

文档修改记录

时间	描述
2016-01-05	博文完成

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CSDN：http://blog.csdn.net/y550918116j

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