从ios中的UIImageWriteToSavedPhotosAlbum获取图像名称[重复]

Posted 2023-05-07

【中文标题】从ios中的UIImageWriteToSavedPhotosAlbum获取图像名称[重复]

【英文标题】：Get image name from UIImageWriteToSavedPhotosAlbum in ios [duplicate]

【发布时间】：2013-12-23 10:53:25

【问题描述】：

我已经搜索了如何获取从相机拍摄的已保存图像的名称，但我没有找到简单的东西。

这是我的代码：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
if( [picker sourceType] == UIImagePickerControllerSourceTypeCamera)
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    [library writeImageToSavedPhotosAlbum:image.CGImage orientation:(ALAssetOrientation)image.imageOrientation completionBlock:^(NSURL *assetURL, NSError *error )
     
         NSLog(@"IMAGE SAVED TO PHOTO ALBUM");
         [library assetForURL:assetURL resultBlock:^(ALAsset *asset )
          
              NSLog(@"we have our ALAsset!");
              NSLog(@"%@", assetURL);

          
                 failureBlock:^(NSError *error )
          
              NSLog(@"Error loading asset");
          ];
     ];

你有答案，我很乐意测试它。

提前致谢。

【问题讨论】：

我已经尝试过他们的解决方案，但它们对我不起作用。

【参考方案1】：

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
NSURL *resourceURL;
[picker dismissViewControllerAnimated:YES completion:nil];
UIImage *image =[[UIImage alloc] init];

image =[info objectForKey:@"UIImagePickerControllerOriginalImage"];

NSURL *imagePath = [info objectForKey:@"UIImagePickerControllerReferenceURL"];

NSString *imageName = [imagePath lastPathComponent];

resourceURL = [info objectForKey:UIImagePickerControllerReferenceURL];


NSData *imageData;
NSString *extensionOFImage =[imageName substringFromIndex:[imageName rangeOfString:@"."].location+1 ];

if ([extensionOFImage isEqualToString:@"jpg"])

    imageData =  UIImagePNGRepresentation(image);


else

    imageData =    UIImageJPEGRepresentation(image, 1.0);


int imageSize=imageData.length/1024;
    NSLog(@"imageSize--->%d", imageSize);
if (imageName!=nil) 
   NSLog(@"imageName--->%@",imageName);

else

   NSLog(@"no image name found");

如果您使用的是 ASSerts

-(void)assetPickerController:(WSAssetPickerController *)sender didFinishPickingMediaWithAssets:(NSArray *)assets

[self dismissViewControllerAnimated:YES completion:^

    if (assets.count < 1) return;

    //self.pageControl.numberOfPages = assets.count;

    int index = 0;

    for (ALAsset *asset in assets) 
        //  NSString *imageName = [[asset defaultRepresentation] filename];

        UIImage *image = [[UIImage alloc] initWithCGImage:asset.defaultRepresentation.fullScreenImage];
        // (@"%@", [[asset defaultRepresentation] filename]);
        NSData *imageData = UIImagePNGRepresentation(image);
        int imageSize=imageData.length/1024;
    (either)    
   NSURL *imagePath = [asset objectForKey:@"UIImagePickerControllerReferenceURL"];
    //  NSURL *imagePath = [NSURL URLWithString:[asset ob]];
         NSString *imageName = [imagePath lastPathComponent];
    (or)
    NSLog(@"%@",[[asset defaultRepresentation] filename]);
        index++;
    

];

【讨论】：

感谢您的帮助，我不使用资产。我试过你的解决方案（第一个），但照片没有保存:(

得到 imageData 后在控制台打印一次，看看打印了多少字节数据。

此语句后 image =[info objectForKey:@"UIImagePickerControllerOriginalImage"];写 if(image) NSLog(@"Have image"); elseNSLog(@"no Image") if the statement is true 分享你显示图像的代码再次检查我的代码，我们会回复您

我添加了 nslog，它返回我有一个图像。

您能否分享一下您如何显示图像的代码。

【参考方案2】：

试试下面的代码。我在我以前的一个项目中使用过它，它对我有用：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 

  _selectedImage = info[UIImagePickerControllerEditedImage];
  self.photoView.image = _selectedImage;

  NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];

  // define the block to call when we get the asset based on the url (below)
  ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *imageAsset)
  
     ALAssetRepresentation *imageRep = [imageAsset defaultRepresentation];
     NSLog(@"[imageRep filename] : %@", [imageRep filename]);
  ;

  // get the asset library and fetch the asset based on the ref url (pass in block above)
  ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
  [assetslibrary assetForURL:refURL resultBlock:resultblock failureBlock:nil];

  [picker dismissViewControllerAnimated:YES completion:NULL];

【讨论】：

感谢您的帮助，但文件名始终为空且照片未保存:(