using swift 2.0 save photo to custom album

新建了一個CustomAblum類，寫成了單例, 這個寫單例的方式是swift中的最好的一種方式：

staticletsharedInstance = CustomAblum()

定義幾個變量：

varassetCollection: PHAssetCollection!varalbumFound : Bool =falsevarphotosAsset: PHFetchResult!varcollection: PHAssetCollection!varassetCollectionPlaceholder: PHObjectPlaceholder!staticletalbumName ="愛拍美圖"

在初始化方法中創(chuàng)建自定義相冊

init() {self.createAlbum()? ? }

privatefunccreateAlbum(){letfetchOptions =PHFetchOptions()? ? ? ? fetchOptions.predicate =NSPredicate(format:"title = %@",CustomPhotoAlbum.albumName)letcollection :PHFetchResult=PHAssetCollection.fetchAssetCollectionsWithType(.Album, subtype: .Any, options: fetchOptions)iflet_:AnyObject= collection.firstObject {self.albumFound =trueassetCollection = collection.firstObjectas!PHAssetCollection}else{PHPhotoLibrary.sharedPhotoLibrary().performChanges({letcreateAlbumRequest :PHAssetCollectionChangeRequest=PHAssetCollectionChangeRequest.creationRequestForAssetCollectionWithTitle(CustomPhotoAlbum.albumName)self.assetCollectionPlaceholder = createAlbumRequest.placeholderForCreatedAssetCollection? ? ? ? ? ? ? ? }, completionHandler: { success, errorinself.albumFound = (success ?true:false)if(success) {letcollectionFetchResult =PHAssetCollection.fetchAssetCollectionsWithLocalIdentifiers([self.assetCollectionPlaceholder.localIdentifier], options:nil)print(collectionFetchResult)self.assetCollection = collectionFetchResult.firstObjectas!PHAssetCollection}? ? ? ? ? ? })? ? ? ? }? ? }

寫一個saveImage方法：

funcsaveImage(image: UIImage){ifself.assetCollection !=nil{PHPhotoLibrary.sharedPhotoLibrary().performChanges({letassetChangeRequest =PHAssetChangeRequest.creationRequestForAssetFromImage(image)letassetPlaceholder = assetChangeRequest.placeholderForCreatedAssetletalbumChangeRequest =PHAssetCollectionChangeRequest(forAssetCollection:self.assetCollection)? ? ? ? ? ? ? ? albumChangeRequest?.addAssets([assetPlaceholder!])? ? ? ? ? ? ? ? }, completionHandler:nil)? ? ? ? }? ? }

調(diào)用保存時，這樣調(diào)用：

CustomPhotoAlbum.sharedInstance.saveImage(image)

文／ShawnDu（簡書作者）

原文鏈接：http://www.itdecent.cn/p/365a30d6510f

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