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  • How to save and fetch image data from documents directory in iOS

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    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:-

     

     

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