创建应用程序自己的照片库（iOS）

Question

您好我有一个应用程序，它拍摄照片并将新拍摄的照片显示在图像视图中。我可以保存图像并重新加载它。它保存在应用程序的目录中。是否可以仅为该应用程序的使用创建相册？出于安全考虑，不应在iPhone的照片库中看到这些图片。如果有可能，任何人都可以向我解释如何做到这一点？这是我目前的代码。

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate> {
    UIImagePickerController *picker;
    UIImagePickerController *picker2;
    UIImage *image;
    IBOutlet UIImageView *imageView;
}

-(IBAction)TakePhoto;
-(IBAction)ChooseExisting;
- (IBAction)btnSave:(id)sender;
- (IBAction)btnLoad:(id)sender;

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

-(IBAction)TakePhoto{
    picker = [[UIImagePickerController alloc]init];
    picker.delegate=self;
    [picker setSourceType:UIImagePickerControllerSourceTypeCamera];
    [self presentViewController:picker animated:YES completion:NULL];
   // [picker release];


}

- (void)loadImage
{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"image.png"]; //Add the file name
    NSData *pngData = [NSData dataWithContentsOfFile:filePath];
    image = [UIImage imageWithData:pngData];
}
-(IBAction)ChooseExisting{
    picker2 = [[UIImagePickerController alloc]init];
    picker2.delegate=self;
    [picker2 setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
    [self presentViewController:picker2 animated:YES completion:NULL];
    // [picker release];

}

- (NSString *)documentsPathForFileName:(NSString *)name
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0];

    return [documentsPath stringByAppendingPathComponent:name];
}
- (IBAction)btnSave:(id)sender {

    NSData *pngData = UIImagePNGRepresentation(image);
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"image.png"]; //Add the file name
    [pngData writeToFile:filePath atomically:YES]; //Write the file
}
- (IBAction)btnLoad:(id)sender {
    [self loadImage];
    [imageView setImage:image];
}



-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
    image = [info objectForKey:UIImagePickerControllerOriginalImage];
    [imageView setImage:image];
    [self dismissViewControllerAnimated:YES completion:NULL];
}

- (void)viewDidLoad
{
    [self loadImage];
    [imageView setImage:image];
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end