您可以使用Photos 框架从CameraRoll/Photos 中获取照片。
这是 Swift 3 代码的版本。
导入照片框架
import Photos
//Array of PHAsset type for storing photos
var images = [PHAsset]()
使用此功能获取照片，在viewDidLoad 的某处或在您想要获取照片的任何位置进行操作。
func getImages() {
let assets = PHAsset.fetchAssets(with: PHAssetMediaType.image, options: nil)
assets.enumerateObjects({ (object, count, stop) in
// self.cameraAssets.add(object)
self.images.append(object)
})
//In order to get latest image first, we just reverse the array
self.images.reverse()
// To show photos, I have taken a UICollectionView
self.photosCollectionView.reloadData()
}
其余是 UICollectionView 数据源和委托。有关如何显示图像，请参阅 cellForItem 数据源方法。
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return images.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "PhotoCollectionViewCell", for: indexPath) as! PhotoCollectionViewCell
let asset = images[indexPath.row]
let manager = PHImageManager.default()
if cell.tag != 0 {
manager.cancelImageRequest(PHImageRequestID(cell.tag))
}
cell.tag = Int(manager.requestImage(for: asset,
targetSize: CGSize(width: 120.0, height: 120.0),
contentMode: .aspectFill,
options: nil) { (result, _) in
cell.photoImageView?.image = result
})
return cell
}
根据您的需要调整以下代表。
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = self.view.frame.width * 0.32
let height = self.view.frame.height * 0.179910045
return CGSize(width: width, height: height)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 2.5
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 0
}
确保保持照片权限开启。如果你点击不允许，那么你也必须使用PHPhotoLibrary.authorizationStatus()管理授权
您可以阅读有关Photos 框架的更多信息。