保存图片到本地 相册

情景一：保存网络图片到本地

 var result:NSData?
                do{
                    if self.imageUrls.count>0 {
                        result = try Data(contentsOf: URL(string: self.imageUrls)!, options: Data.ReadingOptions.uncached) as NSData
                        let imag = UIImage(data: result! as Data, scale: 1)
                        PHPhotoLibrary.shared().performChanges({
                            PHAssetChangeRequest.creationRequestForAsset(from: imag!)
                        }) { (isSuccess, error) in
                            LSDKLog("\(isSuccess)----\(String(describing: error))")
                            if isSuccess {
                                LSSVProgressHUD.LSShowSuccess("保存成功")
                                self.shareView?.removeShareView()
                            } else {
                                LSDKLog("error---->\(String(describing: error))")
                                LSSVProgressHUD.LSShowSuccess("保存失败")
                            }
                            }
                    }else{
                        LSSVProgressHUD.LSShowSuccess("保存失败")
                    }
                }catch{
                    print("请求图片地址错误")
                    LSSVProgressHUD.LSShowSuccess("保存失败")
                }

情景二：保存本地图片至本地
方法二

//MARK: Photos框架保存照片
///保存照片--> 建议使用 <Photos框架保存照片>
func saveImage(image: UIImage) {
    PHPhotoLibrary.shared().performChanges({
        PHAssetChangeRequest.creationRequestForAsset(from: image)
    }) { (isSuccess, error) in
        print("\(isSuccess)----\(String(describing: error))")
        if isSuccess {
            MessateAlert.Use(titleStr: "保存成功")
        } else {
            print("error---->\(String(describing: error))")
            MessateAlert.Use(titleStr: "系统问题，保存失败")
        }
    }
}
 
 
///保存图片，并从相册获取保存的照片
func savePhotoAndGetphoto() {
    var localID: String!//标识符
    PHPhotoLibrary.shared().performChanges({
        let result = PHAssetChangeRequest.creationRequestForAsset(from: UIImage())
        let assetPlaceholder = result.placeholderForCreatedAsset
        //保存标识符
        localID = assetPlaceholder?.localIdentifier
    }) { (succ, error) in
        if succ {
            print("保存成功")
            //通过标识符获取对应的资源
            let assetResult = PHAsset.fetchAssets(withLocalIdentifiers: [localID], options: nil)
            let asset = assetResult[0]
            let options = PHContentEditingInputRequestOptions()
            options.canHandleAdjustmentData = {(adjustmeta: PHAdjustmentData) -> Bool in
                return true
            }
            //获取保存的图片路径
            asset.requestContentEditingInput(with: options, completionHandler: { (contentEditingInput: PHContentEditingInput?, info: [AnyHashable : Any]) in
                let file = contentEditingInput!.fullSizeImageURL!
                print("地址：\(file)")
            })
            
            //获取保存的原图
            PHImageManager.default().requestImage(for: asset, targetSize: PHImageManagerMaximumSize, contentMode: PHImageContentMode.aspectFit, options: nil, resultHandler: { (image, handle: [AnyHashable : Any]?) in
                print("获取原图成功：\(String(describing: image))")
            })
            
            //获取保存的缩略图
            PHImageManager.default().requestImage(for: asset, targetSize: CGSize.init(width: 100, height: 100), contentMode: PHImageContentMode.aspectFit, options: nil, resultHandler: { (image, handle: [AnyHashable : Any]?) in
                print("获取缩略图成功：\(String(describing: image))")
            })
        } else {
            print("保存失败-->\(error!.localizedDescription)")
        }
    }

}

方法一

///保存图片 --> UIImageWriteToSavedPhotosAlbum
func saveImageToAlbum(image:UIImage) {
    print("图片--->\(image)")
    UIImageWriteToSavedPhotosAlbum(image, self, #selector(image(image:didFinishSavingWithError:contextInfo:)), nil)
}
@objc func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo:UnsafeRawPointer) {
    if let e = error as NSError? {
        print(e)
    } else {
        MessateAlert.Use(titleStr: "保存成功")
    }