Screenshot to NSMutableArray

[jcc]

Hello,

I am attempting to create a screenshot and save it to the Documents Folder so that I can load it in an NSMutableArray. I am able to capture the screenshot and save to the documents folder with the following code:

	UIGraphicsBeginImageContext(self.view.bounds.size);
	
	[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
	
	UIImage *viewImage =UIGraphicsGetImageFromCurrentImageContext();
	
	UIGraphicsEndImageContext();
	
		
	
	
	NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(viewImage)];
	
	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	
	NSString *documentsDirectory = [paths objectAtIndex:0];
	
	documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"Screenshot.png"];

	[imageData writeToFile:documentsDirectory atomically:YES];

My problem is that I don't know how to retrieve this image and load it into an NSMutableArray. I have tried a variety of ways but can't figure it out.

Any ideas?

Thanks!

[SoulRed12]

Use imageWithContentsOfFile to load the image, and for your path, specify the image name appended to the path for the documents directory.

[jcc]

So something like this?


NSString *filePath = [documentsDirectory stringByAppendingPathComponent: @"/Screenshot.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage: [UIImage imageWithContentsOfFile: filePath]];

[myArray addObject:imageView];



I keep trying this but it crashes the App

[Duncan C]

Originally Posted by jcc

So something like this?


NSString *filePath = [documentsDirectory stringByAppendingPathComponent: @"/Screenshot.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage: [UIImage imageWithContentsOfFile: filePath]];

[myArray addObject:imageView];



I keep trying this but it crashes the App

Make sure documentsDirectory has been set up correctly. Many people create a function getDocumentsDirectory() that does the 3 lines of code to get the documents directory, and call that when they need it.

[jcc]

Thanks for the help. I cannot find any examples using getDocumentsDirectory(). I know that the image is being saved into the Applications Documents Folder. I just am having trouble accessing the image to insert into an array.

I have tried other methods (such as NSFileManager to delete the file) to see if I am calling the file correctly and it all works.

I have posted the code below:

- (IBAction) saveImage:(id)sender;
{
	
	
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Screenshot Saved" message:@"A screenshot of your work has been saved to your Photos album." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
    [alert show];
    [alert release];
	
	
	
	UIGraphicsBeginImageContext(self.view.bounds.size);
	
	[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
	
	UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
	
	UIGraphicsEndImageContext();
	
		
	

	NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(viewImage)];
	
	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	
	NSString *documentsDirectory = [paths objectAtIndex:0];
	
	documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"Screenshot.png"];

	[imageData writeToFile:documentsDirectory atomically:YES];
	
	

	NSString *documentsDirectoryPath = [paths objectAtIndex:0];
	NSString *databaseFile = [documentsDirectoryPath stringByAppendingPathComponent:@"Screenshot.png"];
	
	

	[myArray addObject:databaseFile];

		
}

[jcc]

Any code examples that might help?

I'm completely new to all of this and don't really understand the developer lingo. However, If someone can provide a code sample that would lead me in the right direction that would be very appreciated!

[SoulRed12]

Wait a second--you have the code to access the documents directory in your original code:

//(from your code in the first post)
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	
	NSString *documentsDirectory = [paths objectAtIndex:0];
	
	documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"Screenshot.png"];

^This is what you need. Do this again when you need to load it, and afterward just use [UIImage imageWithContentsOfFile:documentsDirectory].

[jcc]

Got it! Maybe I wasn't so lost after all.