iPhone 使用 AlAssetLibrary 自动将照片与我们的应用程序同步

发布于 2024-11-01 00:49:44 字数 284 浏览 4 评论 0原文

我刚刚开始开发一个应用程序，我想在其中自动同步存储在用户照片库中的所有图像作为资产。

我能够获取作为资产存储的图像的 URL。

e.g. assets-library://asset/asset.JPG?id=1000000003&ext=JPG

现在，如何将此图像复制到应用程序的文档目录中，或者如何通过在 NSData 或 UIImage 中获取存储在资产中的图像来显示该图像？

提前致谢。

原文

I have just started developing an application in which I want to auto sync all the images stored in user's photo library as assets.

I am able to get URL for images those are stored as assets.

e.g. assets-library://asset/asset.JPG?id=1000000003&ext=JPG

Now, how do I copy this image in to document's directory of my application or how do I just display image stored in assets by getting that in NSData or in UIImage?

Thanks in Advance.

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余厌 2024-11-08 00:49:44

您可以在 UIImagePickerControllerDelegate 委托实现中使用以下代码

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

    //obtaining saving path
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *imagePath = [documentsDirectory stringByAppendingPathComponent:@"my_photo.png"];

    //extracting image from the picker and saving it
    UIImage *editedImage = [info objectForKey:UIImagePickerControllerEditedImage];
    NSData *imageData = UIImagePNGRepresentation(editedImage);
    [imageData writeToFile:imagePath atomically:YES];

}

You can use the following code in UIImagePickerControllerDelegate delegate implementation

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

    //obtaining saving path
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *imagePath = [documentsDirectory stringByAppendingPathComponent:@"my_photo.png"];

    //extracting image from the picker and saving it
    UIImage *editedImage = [info objectForKey:UIImagePickerControllerEditedImage];
    NSData *imageData = UIImagePNGRepresentation(editedImage);
    [imageData writeToFile:imagePath atomically:YES];

}

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