不推荐使用 ALAssetsLibrary 方法

Posted 2023-03-08

【中文标题】不推荐使用 ALAssetsLibrary 方法

【英文标题】：ALAssetsLibrary methods deprecated

【发布时间】：2017-03-02 12:43:38

【问题描述】：

已弃用，更新后的代码是什么？

 ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
    [library assetForURL:referenceURL resultBlock:^(ALAsset *asset) 
        ALAssetRepresentation *rep = [asset defaultRepresentation];

【问题讨论】：

看到这个***.com/questions/33500266/…

不推荐使用的是整个框架。使用Photos.framework

【参考方案1】：

使用以下代码从图库中获取所有图片： 首先，您需要导入 Photo 框架。

#import <Photos/Photos.h>

获取图片前先授权：

[phphotoLibrary requestAuthorization:^(PHAuthorizationStatus status)
 
     switch (status) 
         case PHAuthorizationStatusAuthorized:
             [self performSelectorOnMainThread:@selector(getAllPictures) withObject:nil waitUntilDone:NO];
             // [self getAllPictures];
             NSLog(@"PHAuthorizationStatusAuthorized");
             break;
         case PHAuthorizationStatusRestricted:
             NSLog(@"PHAuthorizationStatusRestricted");
             break;
         case PHAuthorizationStatusDenied:
             NSLog(@"PHAuthorizationStatusDenied");
             break;
         default:
             break;
     
 ];

-(void)getAllPicture

            NSLog(@"Started...");
            PHImageRequestOptions *requestOptions = [[PHImageRequestOptions alloc] init];
            requestOptions.synchronous = YES;
            PHFetchOptions *allPhotosOptions = [PHFetchOptions new];
            allPhotosOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]];

            PHFetchResult *result = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:allPhotosOptions];
            for (PHAsset *asset in result) 

                NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
                [dic setValue:asset forKey:@"assest"];
                [YOUR_ARRAY insertObject:dic atIndex:0];
                dic = nil;
            
            NSLog(@"Completed...");

您可以从以下代码中检索图像：

PHImageRequestOptions *requestOptions = [[PHImageRequestOptions alloc] init];
requestOptions.synchronous = YES;

PHImageManager *manager = [PHImageManager defaultManager];
[manager requestImageForAsset:YOUR_ARRAY[INDEX_ARRAY][@"assest"]
                   targetSize:CGSizeMake(self.view.frame.size.width/3, 200)
                  contentMode:PHImageContentModeDefault
                      options:requestOptions
                resultHandler:^void(UIImage *image, NSDictionary *info) 
                    YOUR_IMAGE_VIEW.image = image;
                ];