How to create user define images and save them in iPhone image gallery ?

This example shows how to create user define image and save them to iPhone image gallery.

You can download source code from here Download.

1. Code for .h file.

#import

@interface RootViewController : UIViewController {
  
    CGPoint pointCurrent;
    IBOutlet UIImageView *img;
}

- (void)btnClear_Clicked:(id)sender;
- (void)btnSave_Clicked:(id)sender;
- (void)btnShow_Clicked:(id)sender;

@end

2. Code for .m file.

#import "RootViewController.h"


@implementation RootViewController


#pragma mark -
#pragma mark View lifecycle


- (void)viewDidLoad {
    [super viewDidLoad];
  
    self.navigationController.navigationBar.hidden = TRUE;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{  
    UITouch *touch = [touches anyObject];
    pointCurrent = [touch locationInView:self.view];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{  
    UITouch *touch = [touches anyObject];
    CGPoint pointNext = [touch locationInView:self.view];
    UIGraphicsBeginImageContext(img.frame.size);
    [img.image drawInRect:CGRectMake(0, 0, img.frame.size.width, img.frame.size.height)];
    CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 2.0);
    CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 1.0, 0.0, 0.0, 1.0);
    CGContextMoveToPoint(UIGraphicsGetCurrentContext(), pointCurrent.x, pointCurrent.y);
    CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), pointNext.x, pointNext.y);
    CGContextStrokePath(UIGraphicsGetCurrentContext());
    img.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    pointCurrent = pointNext;
}

- (void)btnClear_Clicked:(id)sender
{
    img.image = nil;
}

- (void)btnSave_Clicked:(id)sender
{
    UIImageWriteToSavedPhotosAlbum(img.image, nil, nil, nil);
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Success" message:@"Image saved successfully to iPhone photo albums..." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
    [alert show];
    [alert release];
}

- (void)btnShow_Clicked:(id)sender
{
  
}

#pragma mark -
#pragma mark Memory management

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
  
    // Relinquish ownership any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    // Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
    // For example: self.myOutlet = nil;
}


- (void)dealloc {
    [super dealloc];
}


@end