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iPhone-如何创建自定义相册，并以编程方式为相机卷中的照片指定自定义名称？

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iPhone-如何创建自定义相册，并以编程方式为相机卷中的照片指定自定义名称？,iphone,ios,camera,nsfilemanager,Iphone,Ios,Camera,Nsfilemanager,我正在开发一个iPhone照片应用程序，因此我需要在camera roll中创建一个名为“My album”的单独相册，并需要在新创建的目录中使用自定义名称保存我的UIImageView图像，例如“My image.png” 如何实现这一点？您可以在iOS中使用以下代码行轻松创建自定义相册并添加图像： // Create the new album. __block PHObjectPlaceholder *myAlbum; [[PHPhotoLibrary sharedPhotoLibrary

我正在开发一个iPhone照片应用程序，因此我需要在camera roll中创建一个名为“My album”的单独相册，并需要在新创建的目录中使用自定义名称保存我的UIImageView图像，例如“My image.png”

如何实现这一点？

您可以在iOS中使用以下代码行轻松创建自定义相册并添加图像：

// Create the new album.
__block PHObjectPlaceholder *myAlbum;
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
    PHAssetCollectionChangeRequest *changeRequest = [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:title];
    myAlbum = changeRequest.placeholderForCreatedAssetCollection;
} completionHandler:^(BOOL success, NSError *error) {
    if (success) {
        PHFetchResult *fetchResult = [PHAssetCollection fetchAssetCollectionsWithLocalIdentifiers:@[myAlbum.localIdentifier] options:nil];
        PHAssetCollection *assetCollection = fetchResult.firstObject;

        [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
            PHAssetChangeRequest *assetChangeRequest = [PHAssetChangeRequest creationRequestForAssetFromImage:image];

            // add asset
            PHAssetCollectionChangeRequest *assetCollectionChangeRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:assetCollection];
            [assetCollectionChangeRequest addAssets:@[[assetChangeRequest placeholderForCreatedAsset]]];
        } completionHandler:^(BOOL success, NSError *error) {
            if (!success) {
                NSLog(@"Error: %@", error);
            }
        }];
    } else {
        NSLog(@"Error: %@", error);
    }
}];
使用iOS中的以下代码行，您可以轻松创建自定义相册并添加图像：

// Create the new album.
__block PHObjectPlaceholder *myAlbum;
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
    PHAssetCollectionChangeRequest *changeRequest = [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:title];
    myAlbum = changeRequest.placeholderForCreatedAssetCollection;
} completionHandler:^(BOOL success, NSError *error) {
    if (success) {
        PHFetchResult *fetchResult = [PHAssetCollection fetchAssetCollectionsWithLocalIdentifiers:@[myAlbum.localIdentifier] options:nil];
        PHAssetCollection *assetCollection = fetchResult.firstObject;

        [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
            PHAssetChangeRequest *assetChangeRequest = [PHAssetChangeRequest creationRequestForAssetFromImage:image];

            // add asset
            PHAssetCollectionChangeRequest *assetCollectionChangeRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:assetCollection];
            [assetCollectionChangeRequest addAssets:@[[assetChangeRequest placeholderForCreatedAsset]]];
        } completionHandler:^(BOOL success, NSError *error) {
            if (!success) {
                NSLog(@"Error: %@", error);
            }
        }];
    } else {
        NSLog(@"Error: %@", error);
    }
}];
它从iOS 5.0开始工作。
请导入AssetLibrary/AssetLibrary.h

ALAssetsLibrary* libraryFolder = [[ALAssetsLibrary alloc] init];
[libraryFolder addAssetsGroupAlbumWithName:@"My Album" resultBlock:^(ALAssetsGroup *group) 
{
    NSLog(@"Adding Folder:'My Album', success: %s", group.editable ? "Success" : "Already created: Not Success");
} failureBlock:^(NSError *error) 
{
    NSLog(@"Error: Adding on Folder");
}];
它从iOS 5.0开始工作。
请导入AssetLibrary/AssetLibrary.h

ALAssetsLibrary* libraryFolder = [[ALAssetsLibrary alloc] init];
[libraryFolder addAssetsGroupAlbumWithName:@"My Album" resultBlock:^(ALAssetsGroup *group) 
{
    NSLog(@"Adding Folder:'My Album', success: %s", group.editable ? "Success" : "Already created: Not Success");
} failureBlock:^(NSError *error) 
{
    NSLog(@"Error: Adding on Folder");
}];
您可以尝试以下方法为iOS 7和iOS 8创建相册

#define PHOTO_ALBUM_NAME @"AlbumName Videos"
-(void)createAlbum{

// PHPhotoLibrary_class will only be non-nil on iOS 8.x.x
Class PHPhotoLibrary_class = NSClassFromString(@"PHPhotoLibrary");

if (PHPhotoLibrary_class) {


    // iOS 8..x. . code that has to be called dynamically at runtime and will not link on iOS 7.x.x ...

    [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
        [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:PHOTO_ALBUM_NAME];
    } completionHandler:^(BOOL success, NSError *error) {
        if (!success) {
            NSLog(@"Error creating album: %@", error);
        }else{
            NSLog(@"Created");
        }
    }];
}else{
    [self.library addAssetsGroupAlbumWithName:PHOTO_ALBUM_NAME resultBlock:^(ALAssetsGroup *group) {
        NSLog(@"adding album:'Compressed Videos', success: %s", group.editable ? "YES" : "NO");

        if (group.editable == NO) {
        }

    } failureBlock:^(NSError *error) {
        NSLog(@"error adding album");
    }];
}}
您可以尝试以下方法为iOS 7和iOS 8创建相册

#define PHOTO_ALBUM_NAME @"AlbumName Videos"
-(void)createAlbum{

// PHPhotoLibrary_class will only be non-nil on iOS 8.x.x
Class PHPhotoLibrary_class = NSClassFromString(@"PHPhotoLibrary");

if (PHPhotoLibrary_class) {


    // iOS 8..x. . code that has to be called dynamically at runtime and will not link on iOS 7.x.x ...

    [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
        [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:PHOTO_ALBUM_NAME];
    } completionHandler:^(BOOL success, NSError *error) {
        if (!success) {
            NSLog(@"Error creating album: %@", error);
        }else{
            NSLog(@"Created");
        }
    }];
}else{
    [self.library addAssetsGroupAlbumWithName:PHOTO_ALBUM_NAME resultBlock:^(ALAssetsGroup *group) {
        NSLog(@"adding album:'Compressed Videos', success: %s", group.editable ? "YES" : "NO");

        if (group.editable == NO) {
        }

    } failureBlock:^(NSError *error) {
        NSLog(@"error adding album");
    }];
}}
由于
资产库
已弃用，请改用
照片
框架（iOS 8及更高版本）

您可以使用共享的
PHPhotoLibrary
对象来创建新照片，但不能给它们指定名称，因为您将使用需要由photos.app管理的资产。每个资产都有特定的属性。您可以获取对象、请求更改、资产/缩略图加载和缓存等

要创建自定义相册，请使用

简要示例：

// Swift 3.0
func createPhotoLibraryAlbum(name: String) {
    var albumPlaceholder: PHObjectPlaceholder?
    PHPhotoLibrary.shared().performChanges({
        // Request creating an album with parameter name
        let createAlbumRequest = PHAssetCollectionChangeRequest.creationRequestForAssetCollection(withTitle: name)
        // Get a placeholder for the new album
        albumPlaceholder = createAlbumRequest.placeholderForCreatedAssetCollection
    }, completionHandler: { success, error in
        if success {
            guard let placeholder = albumPlaceholder else {
                fatalError("Album placeholder is nil")
            }

            let fetchResult = PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [placeholder.localIdentifier], options: nil)
            guard let album: PHAssetCollection = fetchResult.firstObject else {
                // FetchResult has no PHAssetCollection
                return
            }

            // Saved successfully!
            print(album.assetCollectionType)
        }
        else if let e = error {
            // Save album failed with error
        }
        else {
            // Save album failed with no error
        }
    })
}
不要忘记导入照片库

要在该相册上创建新的照片资源，请使用

更新：

我们需要请求访问才能使用照片库：

PHPhotoLibrary.requestAuthorization { status in
     switch status {
     ...
}
从iOS 10及更高版本开始，我们还需要在target.plist文件中为“隐私-照片库使用说明”添加访问条目：

NSPhotoLibraryUsageDescription
需要访问照片才能提供应用程序功能
由于
资产库
已弃用，请改用
照片
框架（iOS 8及更高版本）

您可以使用共享的
PHPhotoLibrary
对象来创建新照片，但不能给它们指定名称，因为您将使用需要由photos.app管理的资产。每个资产都有特定的属性。您可以获取对象、请求更改、资产/缩略图加载和缓存等

要创建自定义相册，请使用

简要示例：

// Swift 3.0
func createPhotoLibraryAlbum(name: String) {
    var albumPlaceholder: PHObjectPlaceholder?
    PHPhotoLibrary.shared().performChanges({
        // Request creating an album with parameter name
        let createAlbumRequest = PHAssetCollectionChangeRequest.creationRequestForAssetCollection(withTitle: name)
        // Get a placeholder for the new album
        albumPlaceholder = createAlbumRequest.placeholderForCreatedAssetCollection
    }, completionHandler: { success, error in
        if success {
            guard let placeholder = albumPlaceholder else {
                fatalError("Album placeholder is nil")
            }

            let fetchResult = PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [placeholder.localIdentifier], options: nil)
            guard let album: PHAssetCollection = fetchResult.firstObject else {
                // FetchResult has no PHAssetCollection
                return
            }

            // Saved successfully!
            print(album.assetCollectionType)
        }
        else if let e = error {
            // Save album failed with error
        }
        else {
            // Save album failed with no error
        }
    })
}
不要忘记导入照片库

要在该相册上创建新的照片资源，请使用

更新：

我们需要请求访问才能使用照片库：

PHPhotoLibrary.requestAuthorization { status in
     switch status {
     ...
}
从iOS 10及更高版本开始，我们还需要在target.plist文件中为“隐私-照片库使用说明”添加访问条目：

NSPhotoLibraryUsageDescription
需要访问照片才能提供应用程序功能
创建新相册：

/// Create album with given title
/// - Parameters:
///   - title: the title
///   - completionHandler: the completion handler
func createAlbum(withTitle title: String, completionHandler: @escaping (PHAssetCollection?) -> ()) {
    DispatchQueue.global(qos: .background).async {
        var placeholder: PHObjectPlaceholder?
        
        PHPhotoLibrary.shared().performChanges({
            let createAlbumRequest = PHAssetCollectionChangeRequest.creationRequestForAssetCollection(withTitle: title)
            placeholder = createAlbumRequest.placeholderForCreatedAssetCollection
        }, completionHandler: { (created, error) in
            var album: PHAssetCollection?
            if created {
                let collectionFetchResult = placeholder.map { PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [$0.localIdentifier], options: nil) }
                album = collectionFetchResult?.firstObject
            }
            
            completionHandler(album)
        })
    }
}
获取具有指定名称的相册：

/// Get album with given title
/// - Parameters:
///   - title: the title
///   - completionHandler: the completion handler
func getAlbum(title: String, completionHandler: @escaping (PHAssetCollection?) -> ()) {
    DispatchQueue.global(qos: .background).async { [weak self] in
        let fetchOptions = PHFetchOptions()
        fetchOptions.predicate = NSPredicate(format: "title = %@", title)
        let collections = PHAssetCollection.fetchAssetCollections(with: .album, subtype: .any, options: fetchOptions)
        
        if let album = collections.firstObject {
            completionHandler(album)
        } else {
            self?.createAlbum(withTitle: title, completionHandler: { (album) in
                completionHandler(album)
            })
        }
    }
}
并将照片保存到相册：

func save(photo: UIImage, toAlbum titled: String, completionHandler: @escaping (Bool, Error?) -> ()) {
    getAlbum(title: titled) { (album) in
        DispatchQueue.global(qos: .background).async {
            PHPhotoLibrary.shared().performChanges({
                let assetRequest = PHAssetChangeRequest.creationRequestForAsset(from: photo)
                let assets = assetRequest.placeholderForCreatedAsset
                    .map { [$0] as NSArray } ?? NSArray()
                let albumChangeRequest = album.flatMap { PHAssetCollectionChangeRequest(for: $0) }
                albumChangeRequest?.addAssets(assets)
            }, completionHandler: { (success, error) in
                completionHandler(success, error)
            })
        }
    }
}
创建新相册：

/// Create album with given title
/// - Parameters:
///   - title: the title
///   - completionHandler: the completion handler
func createAlbum(withTitle title: String, completionHandler: @escaping (PHAssetCollection?) -> ()) {
    DispatchQueue.global(qos: .background).async {
        var placeholder: PHObjectPlaceholder?
        
        PHPhotoLibrary.shared().performChanges({
            let createAlbumRequest = PHAssetCollectionChangeRequest.creationRequestForAssetCollection(withTitle: title)
            placeholder = createAlbumRequest.placeholderForCreatedAssetCollection
        }, completionHandler: { (created, error) in
            var album: PHAssetCollection?
            if created {
                let collectionFetchResult = placeholder.map { PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [$0.localIdentifier], options: nil) }
                album = collectionFetchResult?.firstObject
            }
            
            completionHandler(album)
        })
    }
}
获取具有指定名称的相册：

/// Get album with given title
/// - Parameters:
///   - title: the title
///   - completionHandler: the completion handler
func getAlbum(title: String, completionHandler: @escaping (PHAssetCollection?) -> ()) {
    DispatchQueue.global(qos: .background).async { [weak self] in
        let fetchOptions = PHFetchOptions()
        fetchOptions.predicate = NSPredicate(format: "title = %@", title)
        let collections = PHAssetCollection.fetchAssetCollections(with: .album, subtype: .any, options: fetchOptions)
        
        if let album = collections.firstObject {
            completionHandler(album)
        } else {
            self?.createAlbum(withTitle: title, completionHandler: { (album) in
                completionHandler(album)
            })
        }
    }
}
并将照片保存到相册：

func save(photo: UIImage, toAlbum titled: String, completionHandler: @escaping (Bool, Error?) -> ()) {
    getAlbum(title: titled) { (album) in
        DispatchQueue.global(qos: .background).async {
            PHPhotoLibrary.shared().performChanges({
                let assetRequest = PHAssetChangeRequest.creationRequestForAsset(from: photo)
                let assets = assetRequest.placeholderForCreatedAsset
                    .map { [$0] as NSArray } ?? NSArray()
                let albumChangeRequest = album.flatMap { PHAssetCollectionChangeRequest(for: $0) }
                albumChangeRequest?.addAssets(assets)
            }, completionHandler: { (success, error) in
                completionHandler(success, error)
            })
        }
    }
}

///保存图像或视频(保存图片或视频）（kUTTypeImage、kUTTypeMovie）
///如果指定了唱片集名称，则添加到唱片集，如果需要，则创建唱片集
///@params mediaArray UIImage，图像或视频的文件URL
+（void）_saveMediaArray:（NSArray*）mediaArray
选项：（LAImageSaverOptions*）选项
完成：（无效（^）（n错误*_可为空错误））完成
{
NSInteger uu块计数=0；
[PHPhotoLibrary.sharedPhotoLibrary性能更改：^{
//如果需要，创建相册
PhaseSetCollectionChangeRequest*assetCollectionChangeRequest=nil；
NSMutableArray*assetChangeRequestPlaceholders=nil；
如果（options.targetAlbumName.length>0）{
assetChangeRequestPlaceholders=[NSMutableArray阵列容量：mediaArray.count]；
PHFetchOptions*fetchOptions=PHFetchOptions.new；
//fetchOptions.includeAssetSourceTypes=PHAssetSourceTypeUserLibrary；
fetchOptions.predicate=[NSPredicate predicateWithFormat:@“localizedTitle=%@”，options.targetAlbumName]；//不能用 块形式的 谓语
PHAssetCollection*assetCollection=[PHAssetCollection获取AssetCollectionSwithType:PHAssetCollectionTypeAlbum子类型：PhasSetCollectionSubtypeAlbum常规选项：获取选项].firstObject；
if（nil==assetCollection）{
assetCollectionChangeRequest=[PhaseSetCollectionChangeRequestCreationRequestforAssetCollectionWithTitle:options.targetAlbumName]；
}否则{
assetCollectionChangeRequest=[PhaseSetCollectionChangeRequestChangeRequestForAssetCollection:assetCollection]；
}
}
//保存图像
for（mediaArray中的id项）{
PhaseSetChangeRequest*assetChangeRequest=nil；
//图像对象
if（[item iskindof类：UIImage.class]）{
UIImage*图像=（UIImage*）项；
assetChangeRequest=[PhaseSetChangeRequest creationRequestForAssetFromImage:image]；
[assetChangeRequestPlaceholders addObject:assetChangeRequest.placeholderForCreatedAsset]；
++计数；
继续；
}
//图像或电影的文件url
NSURL*文件URL=（NSURL*）项；
if（[item iskindof类：NSURL.class]&&fileURL.isFileURL）{
NSString*extension=fileURL.pathExtension；
if（extension.length==0）{
NSLog（@“非法文件URL（无路径扩展）：%@”，文件URL）；
continue；//文件url非法
}
CFStringRef uti=UTTypeCreatePreferredIden