144 lines
8.0 KiB
C
144 lines
8.0 KiB
C
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/**
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* Tencent is pleased to support the open source community by making QMUI_iOS available.
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* Copyright (C) 2016-2021 THL A29 Limited, a Tencent company. All rights reserved.
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* Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
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* http://opensource.org/licenses/MIT
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* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
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*/
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//
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// QMUIAssetsManager.h
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// qmui
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//
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// Created by QMUI Team on 15/6/9.
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//
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#import <UIKit/UIKit.h>
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#import <Photos/PHPhotoLibrary.h>
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#import <Photos/PHCollection.h>
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#import <Photos/PHFetchResult.h>
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#import <Photos/PHAssetChangeRequest.h>
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#import <Photos/PHAssetCollectionChangeRequest.h>
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#import <Photos/PHFetchOptions.h>
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#import <Photos/PHImageManager.h>
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#import "QMUIAssetsGroup.h"
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@class PHCachingImageManager;
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@class QMUIAsset;
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/// Asset 授权的状态
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typedef NS_ENUM(NSUInteger, QMUIAssetAuthorizationStatus) {
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QMUIAssetAuthorizationStatusNotDetermined, // 还不确定有没有授权
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QMUIAssetAuthorizationStatusAuthorized, // 已经授权
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QMUIAssetAuthorizationStatusNotAuthorized // 手动禁止了授权
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};
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typedef void (^QMUIWriteAssetCompletionBlock)(QMUIAsset *asset, NSError *error);
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/// 保存图片到指定相册（传入 UIImage）
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extern void QMUIImageWriteToSavedPhotosAlbumWithAlbumAssetsGroup(UIImage *image, QMUIAssetsGroup *albumAssetsGroup, QMUIWriteAssetCompletionBlock completionBlock);
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/// 保存图片到指定相册（传入图片路径）
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extern void QMUISaveImageAtPathToSavedPhotosAlbumWithAlbumAssetsGroup(NSString *imagePath, QMUIAssetsGroup *albumAssetsGroup, QMUIWriteAssetCompletionBlock completionBlock);
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/// 保存视频到指定相册
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extern void QMUISaveVideoAtPathToSavedPhotosAlbumWithAlbumAssetsGroup(NSString *videoPath, QMUIAssetsGroup *albumAssetsGroup, QMUIWriteAssetCompletionBlock completionBlock);
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/**
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* 构建 QMUIAssetsManager 这个对象并提供单例的调用方式主要出于下面两点考虑：
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* 1. 保存照片/视频的方法较为复杂，为了方便封装系统接口，同时灵活地扩展功能，需要有一个独立对象去管理这些方法。
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* 2. 使用 PhotoKit 获取图片，基本都需要一个 PHCachingImageManager 的实例，为了减少消耗，
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* QMUIAssetsManager 单例内部也构建了一个 PHCachingImageManager，并且暴露给外面，方便获取
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* PHCachingImageManager 的实例。
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*/
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@interface QMUIAssetsManager : NSObject
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/// 获取 QMUIAssetsManager 的单例
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+ (instancetype)sharedInstance;
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/// 获取当前应用的“照片”访问授权状态
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+ (QMUIAssetAuthorizationStatus)authorizationStatus;
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/**
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* 调起系统询问是否授权访问“照片”的 UIAlertView
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* @param handler 授权结束后调用的 block，默认不在主线程上执行，如果需要在 block 中修改 UI，记得 dispatch 到 mainqueue
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*/
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+ (void)requestAuthorization:(void(^)(QMUIAssetAuthorizationStatus status))handler;
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/**
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* 获取所有的相册，包括个人收藏，最近添加，自拍这类“智能相册”
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*
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* @param contentType 相册的内容类型，设定了内容类型后，所获取的相册中只包含对应类型的资源
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* @param showEmptyAlbum 是否显示空相册（经过 contentType 过滤后仍为空的相册）
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* @param showSmartAlbumIfSupported 是否显示"智能相册"
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* @param enumerationBlock 参数 resultAssetsGroup 表示每次枚举时对应的相册。枚举所有相册结束后，enumerationBlock 会被再调用一次，
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* 这时 resultAssetsGroup 的值为 nil。可以以此作为判断枚举结束的标记。
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*/
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- (void)enumerateAllAlbumsWithAlbumContentType:(QMUIAlbumContentType)contentType showEmptyAlbum:(BOOL)showEmptyAlbum showSmartAlbumIfSupported:(BOOL)showSmartAlbumIfSupported usingBlock:(void (^)(QMUIAssetsGroup *resultAssetsGroup))enumerationBlock;
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/// 获取所有相册，默认显示系统的“智能相册”，不显示空相册（经过 contentType 过滤后为空的相册）
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- (void)enumerateAllAlbumsWithAlbumContentType:(QMUIAlbumContentType)contentType usingBlock:(void (^)(QMUIAssetsGroup *resultAssetsGroup))enumerationBlock;
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/**
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* 保存图片或视频到指定的相册
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*
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* @warning 无论用户保存到哪个自行创建的相册，系统都会在“相机胶卷”相册中同时保存这个图片。
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* 因为系统没有把图片和视频直接保存到指定相册的接口，都只能先保存到“相机胶卷”，从而生成了 Asset 对象，
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* 再把 Asset 对象添加到指定相册中，从而达到保存资源到指定相册的效果。
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* 即使调用 PhotoKit 保存图片或视频到指定相册的新接口也是如此，并且官方 PhotoKit SampleCode 中例子也是表现如此，
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* 因此这应该是一个合符官方预期的表现。
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* @warning 无法通过该方法把图片保存到“智能相册”，“智能相册”只能由系统控制资源的增删。
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*/
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- (void)saveImageWithImageRef:(CGImageRef)imageRef albumAssetsGroup:(QMUIAssetsGroup *)albumAssetsGroup orientation:(UIImageOrientation)orientation completionBlock:(QMUIWriteAssetCompletionBlock)completionBlock;
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- (void)saveImageWithImagePathURL:(NSURL *)imagePathURL albumAssetsGroup:(QMUIAssetsGroup *)albumAssetsGroup completionBlock:(QMUIWriteAssetCompletionBlock)completionBlock;
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- (void)saveVideoWithVideoPathURL:(NSURL *)videoPathURL albumAssetsGroup:(QMUIAssetsGroup *)albumAssetsGroup completionBlock:(QMUIWriteAssetCompletionBlock)completionBlock;
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/// 获取一个 PHCachingImageManager 的实例
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- (PHCachingImageManager *)phCachingImageManager;
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@end
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@interface PHPhotoLibrary (QMUI)
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/**
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* 根据 contentType 的值产生一个合适的 PHFetchOptions，并把内容以资源创建日期排序，创建日期较新的资源排在前面
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*
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* @param contentType 相册的内容类型
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*
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* @return 返回一个合适的 PHFetchOptions
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*/
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+ (PHFetchOptions *)createFetchOptionsWithAlbumContentType:(QMUIAlbumContentType)contentType;
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/**
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* 获取所有相册
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*
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* @param contentType 相册的内容类型，设定了内容类型后，所获取的相册中只包含对应类型的资源
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* @param showEmptyAlbum 是否显示空相册（经过 contentType 过滤后仍为空的相册）
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* @param showSmartAlbum 是否显示“智能相册”
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*
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* @return 返回包含所有合适相册的数组
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*/
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+ (NSArray<PHAssetCollection *> *)fetchAllAlbumsWithAlbumContentType:(QMUIAlbumContentType)contentType showEmptyAlbum:(BOOL)showEmptyAlbum showSmartAlbum:(BOOL)showSmartAlbum;
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/// 获取一个 PHAssetCollection 中创建日期最新的资源
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+ (PHAsset *)fetchLatestAssetWithAssetCollection:(PHAssetCollection *)assetCollection;
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/**
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* 保存图片或视频到指定的相册
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*
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* @warning 无论用户保存到哪个自行创建的相册，系统都会在“相机胶卷”相册中同时保存这个图片。
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* 原因请参考 QMUIAssetsManager 对象的保存图片和视频方法的注释。
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* @warning 无法通过该方法把图片保存到“智能相册”，“智能相册”只能由系统控制资源的增删。
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*/
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- (void)addImageToAlbum:(CGImageRef)imageRef albumAssetCollection:(PHAssetCollection *)albumAssetCollection orientation:(UIImageOrientation)orientation completionHandler:(void(^)(BOOL success, NSDate *creationDate, NSError *error))completionHandler;
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- (void)addImageToAlbum:(NSURL *)imagePathURL albumAssetCollection:(PHAssetCollection *)albumAssetCollection completionHandler:(void(^)(BOOL success, NSDate *creationDate, NSError *error))completionHandler;
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- (void)addVideoToAlbum:(NSURL *)videoPathURL albumAssetCollection:(PHAssetCollection *)albumAssetCollection completionHandler:(void(^)(BOOL success, NSDate *creationDate, NSError *error))completionHandler;
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@end
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