photo

#import "ViewController.h"
#import <CTAssetsPickerController.h>

@interface ViewController () <CTAssetsPickerControllerDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
//    label.text =  NSLocalizedStringFromTable(@"Name", @"Test", nil);
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status){
        dispatch_async(dispatch_get_main_queue(), ^{
            
            CTAssetsPickerController *picker = [[CTAssetsPickerController alloc] init];
            
            picker.delegate = self;
            
            picker.assetCollectionSubtypes =
            @[@(PHAssetCollectionSubtypeSmartAlbumUserLibrary),
              @(PHAssetCollectionSubtypeAlbumRegular)];
            
            [self presentViewController:picker animated:YES completion:nil];
            
        });
    }];
}

#pragma mark - <CTAssetsPickerControllerDelegate>
- (void)assetsPickerController:(CTAssetsPickerController *)picker didFinishPickingAssets:(NSArray *)assets
{
    // 关闭图片选择界面
    [picker dismissViewControllerAnimated:YES completion:nil];
    
    // 取出所有选择的图片
    PHImageRequestOptions *requestOptions = [[PHImageRequestOptions alloc] init];
    requestOptions.resizeMode   = PHImageRequestOptionsResizeModeExact;
    requestOptions.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
    PHImageManager *manager = [PHImageManager defaultManager];
    NSInteger index = 0;
    for (PHAsset *asset in assets) {
        [manager requestImageForAsset:asset
                           targetSize:CGSizeMake(100, 100)
                          contentMode:PHImageContentModeAspectFill
                              options:requestOptions
                        resultHandler:^(UIImage *image, NSDictionary *info){
                            UIImageView *imageView = [[UIImageView alloc] init];
                            imageView.image = image;
                            imageView.frame = CGRectMake(110 * (index % 3), 110 * (index / 3), 100, 100);
                            [self.view addSubview:imageView];
                        }];
        
        index++;
    }
}

@end