如何使用 Swift 将照片库的最新照片添加到 uiimageview？

Question

有没有办法将我的照片库的最新照片添加到 uiimageview？我几乎尝试了所有方法，但没有任何效果。

Answer 1

斯威夫特 3

let fetchOptions = PHFetchOptions()
fetchOptions.sortDescriptors = [SortDescriptor(key: "creationDate", ascending: true)]

let fetchResult = PHAsset.fetchAssets(with: .image, options: fetchOptions)

let last = fetchResult.lastObject

if let lastAsset = last {
  let options = PHImageRequestOptions()
  options.version = .current

  PHImageManager.default().requestImage(
    for: lastAsset,
    targetSize: imageView.bounds.size,
    contentMode: .aspectFit,
    options: options,
    resultHandler: { image, _ in
      DispatchQueue.main.async {
        self.imageView.image = image
      }
    }
  )
}

斯威夫特 2

@IBOutlet weak var imageView: UIImageView!

override func viewDidLoad() {
    super.viewDidLoad()

    let fetchOptions = PHFetchOptions()
    fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: true)]

    let fetchResult = PHAsset.fetchAssetsWithMediaType(.Image, options: fetchOptions)

    let last = fetchResult.lastObject

    if let lastAsset = last {
        let options = PHImageRequestOptions()
        options.version = .Current
        options.deliveryMode = .HighQualityFormat

        PHImageManager.defaultManager().requestImageForAsset(
            lastAsset as! PHAsset,
            targetSize: imageView.bounds.size,
            contentMode: .AspectFit,
            options: options,
            resultHandler: { image, _ in
                dispatch_async(dispatch_get_main_queue(), {
                    self.imageView.image = image
                })
            }
        )
    }
}