Hi Reader’s,

This blog includes the concept of how to store and fetch data from document directory. You can easily understand the concept with the help of code given below:-

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
- (IBAction)btnShowImage:(id)sender;

@property (weak, nonatomic) IBOutlet UIImageView *imgView;

@end



ViewController.m


#import "ViewController.h"

@interface ViewController ()
{
    NSData *data;
    NSString *filePath;
}

@end

@implementation ViewController

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

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

-(NSData *)saveImageInDocumentsDirectory
{
    
    NSURL *url= [[NSURL alloc]initWithString:@"https://www.uky.edu/ukat/sites/www.uky.edu.ukat/files/help/mobile/android/apple-logo.png"];
    
    data = [NSData dataWithContentsOfURL:url];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
    filePath = [documentsPath stringByAppendingPathComponent:@"image.png"]; //Add the file name
    [data writeToFile:filePath atomically:YES];
    return data;
}

-(void)fetchImageInDocumentsDirectory:(NSString*)filepath
{
    data = [NSData dataWithContentsOfFile:filePath]; // fetch image data from filepath
}

- (IBAction)btnShowImage:(id)sender {
    [self showImageFromDocumentDirectory:data];
}

-(void)showImageFromDocumentDirectory:(NSData*)dataOfImage
{
    
    UIImage *convertImageFromNSData = [UIImage imageWithData:dataOfImage];
    _imgView.image=convertImageFromNSData;
}
@end

Output:-

You can also download the sample project from the link given below:-