QBImagePickerController 下ALAsset ,PHAsset转图片的使用

1.创建QBImagePickerController    
    QBImagePickerController *imagePickerController = [QBImagePickerController new];
    imagePickerController.delegate = self;
    imagePickerController.mediaType = QBImagePickerMediaTypeAny;
    //是否允许多选
    imagePickerController.allowsMultipleSelection = YES;
    imagePickerController.showsNumberOfSelectedAssets = YES;

    imagePickerController.minimumNumberOfSelection = 3;
    imagePickerController.maximumNumberOfSelection = 6;
    [imagePickerController.selectedAssets addObject:[PHAsset fetchAssetsWithOptions:nil].lastObject];
2.实现代理

#pragma mark - QBImagePickerControllerDelegate

- (void)qb_imagePickerController:(QBImagePickerController *)imagePickerController didFinishPickingAssets:(NSArray *)assets
{
//------------------------------ALAsset---------------------------------//
/*
   [self.imageMutableArray removeAllObjects];

    for (ALAsset * asset in assets) {

        ALAssetRepresentation *assetRep = [asset defaultRepresentation];

        CGImageRef imgRef = [assetRep fullResolutionImage];   //获取高清图片

        UIImage *img = [UIImage imageWithCGImage:imgRef  scale:assetRep.scale                        orientation:(UIImageOrientation)assetRep.orientation];

        [self.imageMutableArray addObject:img];

    }
*/
//------------------------------PHAsset---------------------------------//

    for (PHAsset *set in assets) {
        PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
        options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;

        
        [[PHImageManager defaultManager] requestImageForAsset:set targetSize:[UIScreen mainScreen].bounds.size contentMode:PHImageContentModeAspectFit options:options resultHandler:^(UIImage
*result, NSDictionary *info) {
            //设置图片
            [self.imageArr addObject:result];
        }];
    }
    [imagePickerController dismissViewControllerAnimated:YES completion:NULL];
}

- (void)qb_imagePickerControllerDidCancel:(QBImagePickerController *)imagePickerController
{
    NSLog(@"Canceled");
    [imagePickerController dismissViewControllerAnimated:YES completion:NULL];
}
／／推荐一个个人感觉比较好用的库 －－－－TZImagePickerController
github---https://github.com/banchichen/TZImagePickerController/