@interface ViewController () <UIImagePickerControllerDelegate, UINavigationControllerDelegate>

- (void)getImageFromIpc{  // 1.判斷相冊(cè)是否可以打開(kāi)  if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) return;  // 2. 創(chuàng)建圖片選擇控制器  UIImagePickerController *ipc = [[UIImagePickerController alloc] init];  /**   typedef NS_ENUM(NSInteger, UIImagePickerControllerSourceType) {   UIImagePickerControllerSourceTypePhotoLibrary, // 相冊(cè)   UIImagePickerControllerSourceTypeCamera, // 用相機(jī)拍攝獲取   UIImagePickerControllerSourceTypeSavedPhotosAlbum // 相簿   }   */  // 3. 設(shè)置打開(kāi)照片相冊(cè)類型(顯示所有相簿)   ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;  // ipc.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;  // 照相機(jī)  // ipc.sourceType = UIImagePickerControllerSourceTypeCamera;  // 4.設(shè)置代理  ipc.delegate = self;  // 5.modal出這個(gè)控制器  [self presentViewController:ipc animated:YES completion:nil];}#pragma mark -- <UIImagePickerControllerDelegate>--// 獲取圖片后的操作- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{  // 銷毀控制器  [picker dismissViewControllerAnimated:YES completion:nil];  // 設(shè)置圖片  self.imageView.image = info[UIImagePickerControllerOriginalImage];}

#import <AssetsLibrary/AssetsLibrary.h>

- (void)getOriginalImages{  // 獲得所有的自定義相簿  PHFetchResult<PHAssetCollection *> *assetCollections = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];  // 遍歷所有的自定義相簿  for (PHAssetCollection *assetCollection in assetCollections) {    [self enumerateAssetsInAssetCollection:assetCollection original:YES];  }  // 獲得相機(jī)膠卷  PHAssetCollection *cameraRoll = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary options:nil].lastObject;  // 遍歷相機(jī)膠卷,獲取大圖  [self enumerateAssetsInAssetCollection:cameraRoll original:YES];}

- (void)getThumbnailImages{  // 獲得所有的自定義相簿  PHFetchResult<PHAssetCollection *> *assetCollections = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];  // 遍歷所有的自定義相簿  for (PHAssetCollection *assetCollection in assetCollections) {    [self enumerateAssetsInAssetCollection:assetCollection original:NO];  }  // 獲得相機(jī)膠卷  PHAssetCollection *cameraRoll = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary options:nil].lastObject;  [self enumerateAssetsInAssetCollection:cameraRoll original:NO];}

/** * 遍歷相簿中的所有圖片 * @param assetCollection 相簿 * @param original    是否要原圖 */- (void)enumerateAssetsInAssetCollection:(PHAssetCollection *)assetCollection original:(BOOL)original{  NSLog(@"相簿名:%@", assetCollection.localizedTitle);  PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];  // 同步獲得圖片, 只會(huì)返回1張圖片  options.synchronous = YES;  // 獲得某個(gè)相簿中的所有PHAsset對(duì)象  PHFetchResult<PHAsset *> *assets = [PHAsset fetchAssetsInAssetCollection:assetCollection options:nil];  for (PHAsset *asset in assets) {    // 是否要原圖    CGSize size = original ? CGSizeMake(asset.pixelWidth, asset.pixelHeight) : CGSizeZero;    // 從asset中獲得圖片    [[PHImageManager defaultManager] requestImageForAsset:asset targetSize:size contentMode:PHImageContentModeDefault options:options resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {      NSLog(@"%@", result);    }];  }}