如何从库中获取所有照片

How to fetch all photos from library

下面显示的代码是我尝试过的 already.What 我希望实现的是从 device.Currently 中获取所有照片,只有少数正在 fetched.How 修改代码以便从设备加载所有图像?

let fetchOptions = PHFetchOptions()

let collection:PHFetchResult = PHAssetCollection.fetchAssetCollectionsWithType(.Moment, subtype: .Any, options: fetchOptions)

if let first_Obj:AnyObject = collection.firstObject
{
    self.assetCollection = first_Obj as! PHAssetCollection
}

所有照片都非常简单,但您需要先确保您已获得授权。这里有一些简单的代码来演示:

PHPhotoLibrary.requestAuthorization { (status) in
    switch status
    {
    case .Authorized:
        print("Good to proceed")
        let fetchOptions = PHFetchOptions()
        let allPhotos = PHAsset.fetchAssetsWithMediaType(.Image, options: fetchOptions)
        print("Found \(allPhotos.count) images")
    case .Denied, .Restricted:
        print("Not allowed")
    case .NotDetermined:
        print("Not determined yet")
    }
}

在我的 phone 这个 returns 25750 个项目上。在新的模拟器上,这应该会产生 5 张图像。

更新了大卫对 iOS 10+ & Swift 4.x/3.x:

的回答

向设备请求访问照片的权限:

将以下值添加到您的 info.plist

Privacy - Photo Library Usage Description

并提供一个显示给用户的字符串。

请求所有图片:

PHPhotoLibrary.requestAuthorization { status in
    switch status {
    case .authorized:
        let fetchOptions = PHFetchOptions()
        let allPhotos = PHAsset.fetchAssets(with: .image, options: fetchOptions)
        print("Found \(allPhotos.count) assets")
    case .denied, .restricted:
        print("Not allowed")
    case .notDetermined:
        // Should not see this when requesting
        print("Not determined yet")
    }
}