How to caputure an image and send it to a UIViewController or UIView

lukeirvin · August 2011

I am building a camera app. Currently my app can take photos and sends them to the native Photo Library.

I do know how to capture an image but how do I send that image to another view controller (or even a view)?

Should it use pushnavigationcontroller? or something else?

Thanks much!

Domele · August 2011

I assume you know how to get the UIImage object. Set up a view controller with an image property. Set that property with the UIImage object you get from the picture controller then present it using whatever method you want, pushing it via a nav controller or using the presentModalViewController method.

lukeirvin · August 2011

I need some more help on this.

Everything I have tried just hasn't worked.

I'm obtaining this image but how do I read the image from the view controller I'm pushing too?

I don't know how to connect these two view controllers together.

Now, if I should just push to a different UIView from the same controller, how do I do that?

What seems to be the better method here?

Again, this is a camera app that would work like Instagram or Photovine

Domele · August 2011

Setup a property on your next view controller. If you don't know what a property is, read Brian Slick's guide.

lukeirvin · August 2011

Domele;368669 said:
Setup a property on your next view controller. If you don't know what a property is, read Brian Slick's guide.

As far as I know I have set up a property. Still don't know what to do beyond this.

Domele · August 2011

Well alloc the next view controller, set its image property, and then present it however you want.

lukeirvin · August 2011

Domele;368709 said:
Well alloc the next view controller, set its image property, and then present it however you want.

This is what I have so far:

videoPreviewImageView = [[UIImageView alloc] init];
[videoPreviewImageView setImage:self.img];
[self.view addSubview:videoPreviewImageView];

No clue if I'm on the right path or not.

Rko · August 2011

lukeirvin;368714 said:
This is what I have so far:

videoPreviewImageView = [[UIImageView alloc] init];
[videoPreviewImageView setImage:self.img];
[self.view addSubview:videoPreviewImageView];

No clue if I'm on the right path or not.

NewViewController *aController = [[NewViewController alloc] init];
aController.image = videoPreviewImageView.image;
[self.navigationController pushViewController:aController animated:YES];

NewViewController is a subclass of UIViewController and it has property for image.
wen i mean property , somethin similar to the below code in .h:

@property (nonatomic, retain) UIImage *image;

Synthesis "image" in the .m class

now u can use the image in the NewViewController by just using "self.image".

Hope this helps...!!!!

lukeirvin · August 2011

Rko;368718 said:
NewViewController *aController = [[NewViewController alloc] init];
aController.image = videoPreviewImageView.image;
[self.navigationController pushViewController:aController animated:YES];

NewViewController is a subclass of UIViewController and it has property for image.
wen i mean property , somethin similar to the below code in .h:

@property (nonatomic, retain) UIImage *image;

Synthesis "image" in the .m class

now u can use the image in the NewViewController by just using "self.image".

Hope this helps...!!!!

aController.image = videoPreviewImageView.image;

There is issue with this line of code.

I have image as a property and synthesized.

Rko · August 2011

lukeirvin;368724 said:
aController.image = videoPreviewImageView.image;

There is issue with this line of code.

I have image as a property and synthesized.

probably u can try using self.img which u initially used to set to the imageview.
It would b easy if u can paste ur code here...

Cheers
RKO

Rko · August 2011

BTW,

 

NewViewController *aController = [[NewViewController alloc] init];
aController.image = self.img;
[self.navigationController pushViewController:aController animated:YES];

the above code comes in ur current view controller , after u've an image populated in "self.img"

lukeirvin · August 2011

Rko;368732 said:
BTW,
 

NewViewController *aController = [[NewViewController alloc] init];
aController.image = self.img;
[self.navigationController pushViewController:aController animated:YES];
the above code comes in ur current view controller , after u've an image populated in "self.img"

Still not working. Here's what I've got going on.

First View Controller:

UIGraphicsBeginImageContext(videoPreviewView.bounds.size);
[videoPreviewView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *videoPreviewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

NSData * imageData = UIImagePNGRepresentation(videoPreviewImage);
NSString * filePath = @"photo.png";
[imageData writeToFile:filePath atomically:YES];

SetImageViewController * setImageViewController = [[SetImageViewController alloc] initWithNibName:@"SetImageViewController" bundle:nil];
setImageViewController.image = self.image;
[self.navigationController pushViewController:setImageViewController animated:YES];
[setImageViewController release];

[self dismissModalViewControllerAnimated:YES];

Second View Controller:

videoPreviewImageView = [[UIImageView alloc] init];
[videoPreviewImageView setImage:self.image];
[self.view addSubview:videoPreviewImageView];

Rko · August 2011

Few quick doubts (Correct me if i m wrong) :
UIImage *videoPreviewImage, this is populated with the image.
then, why is
setImageViewController.image = self.image;

Shouldn't it be
setImageViewController.image = videoPreviewImage;

Also, immediately after the push , u are dismissing the current controller. I've my doubts on tat approach of urs as well.

The rest looks fine :)

lukeirvin · August 2011

Changed those two things. Still doesn't work

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How to caputure an image and send it to a UIViewController or UIView

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