Iphone 如何在相册中以照片的名称保存和检索照片

我有以下疑问：

我们可以用“特定名称”将照片（图像）保存到相册中，还是可以在保存后访问照片的名称

我们可以从相册中访问具有其名称的照片吗

请帮忙

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提前感谢。

这是使用用户指定名称编写图像的代码

 // Create paths to output images
 NSString  *pngPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.png"];
 NSString  *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.jpg"];

 // Write a UIImage to JPEG with minimum compression (best quality)
 // The value 'image' must be a UIImage object
 // The value '1.0' represents image compression quality as value from 0.0 to 1.0
 [UIImageJPEGRepresentation(image, 1.0) writeToFile:jpgPath atomically:YES];

 // Write image to PNG
 [UIImagePNGRepresentation(image) writeToFile:pngPath atomically:YES];

 // Let's check to see if files were successfully written...

 // Create file manager
 NSError *error;
 NSFileManager *fileMgr = [NSFileManager defaultManager];

 // Point to Document directory
 NSString *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

 // Write out the contents of home directory to console
 NSLog(@"Documents directory: %@", [fileMgr contentsOfDirectoryAtPath:documentsDirectory error:&error]);

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这是使用用户指定的名称编写图像的代码

 // Create paths to output images
 NSString  *pngPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.png"];
 NSString  *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.jpg"];

 // Write a UIImage to JPEG with minimum compression (best quality)
 // The value 'image' must be a UIImage object
 // The value '1.0' represents image compression quality as value from 0.0 to 1.0
 [UIImageJPEGRepresentation(image, 1.0) writeToFile:jpgPath atomically:YES];

 // Write image to PNG
 [UIImagePNGRepresentation(image) writeToFile:pngPath atomically:YES];

 // Let's check to see if files were successfully written...

 // Create file manager
 NSError *error;
 NSFileManager *fileMgr = [NSFileManager defaultManager];

 // Point to Document directory
 NSString *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

 // Write out the contents of home directory to console
 NSLog(@"Documents directory: %@", [fileMgr contentsOfDirectoryAtPath:documentsDirectory error:&error]);

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使用委托

UIImagePickerControllerDelegate

调用相机或图像库

调用摄影机：

UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;

picker.sourceType = UIImagePickerControllerSourceTypeCamera;
isCamera = YES;

[self presentModalViewController:picker animated:YES];

UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;

[picker setAllowsEditing:YES];

[self presentModalViewController:(UIViewController*)picker animated:YES];

调用库：

UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;

picker.sourceType = UIImagePickerControllerSourceTypeCamera;
isCamera = YES;

[self presentModalViewController:picker animated:YES];

UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;

[picker setAllowsEditing:YES];

[self presentModalViewController:(UIViewController*)picker animated:YES];

完成后，将调用委托方法：

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

要将图像写入库，请使用：

UIImageWriteToSavedPhotosAlbum(currentImage, nil, nil, nil);

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或者将从照片库中拾取的选定图像保存到

UIImage

并对其执行进一步操作。

使用委托

UIImagePickerControllerDelegate

调用相机或图像库

调用摄影机：

UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;

picker.sourceType = UIImagePickerControllerSourceTypeCamera;
isCamera = YES;

[self presentModalViewController:picker animated:YES];

UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;

[picker setAllowsEditing:YES];

[self presentModalViewController:(UIViewController*)picker animated:YES];

调用库：

UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;

picker.sourceType = UIImagePickerControllerSourceTypeCamera;
isCamera = YES;

[self presentModalViewController:picker animated:YES];

UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;

[picker setAllowsEditing:YES];

[self presentModalViewController:(UIViewController*)picker animated:YES];

完成后，将调用委托方法：

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

要将图像写入库，请使用：

UIImageWriteToSavedPhotosAlbum(currentImage, nil, nil, nil);

---

或者将从照片库中选择的图像保存到

UIImage

，并对其执行进一步操作。

感谢您回答我的问题。实际上，我需要用特定的名称将照片保存到相册中，而不是文档目录。谢谢您回答我的问题。实际上，我需要用特定的名称将照片保存到相册中，而不是文档目录。@Janinak:Hi，我知道如何使用imagePicker和保存图像等。但我的疑问是，如何保存和访问具有特定名称的图像。您的程序不允许在其“沙盒”之外保存内容。@Janinak:Hi，我知道如何使用imagePicker和保存图像等，但我的疑问是，如何保存和访问具有特定名称的图像。您的程序不允许在其“沙盒”之外保存内容。