如何在iOS 9中使用照片框架获取图像元数据

PHPhotoLibrary.requestAuthorization { (status) in
    if status == .authorized {
        // 用户已授权访问照片库，可以进行后续操作
    } else {
        // 用户未授权访问照片库，需要处理相应逻辑
    }
}

let fetchOptions = PHFetchOptions()
fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
let fetchResult = PHAsset.fetchAssets(with: .image, options: fetchOptions)

if let asset = fetchResult.firstObject {
    asset.requestContentEditingInput(with: nil, completionHandler: { (contentEditingInput, info) in
        if let imageURL = contentEditingInput?.fullSizeImageURL {
            let ciImage = CIImage(contentsOf: imageURL)
            let context = CIContext(options: nil)
            let imageProperties = ciImage?.properties
            // 在imageProperties中可以获取到图像的元数据
        }
    })
}