iOS Camera Management

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Camera Introduction

The camera is one of the common features of mobile devices. We can use the camera to take pictures and invoke it in applications, and using the camera is very simple.

Example Steps

1. Create a simple View-based application.

2. Add a button to ViewController.xib and create an IBAction for the button.

3. Add an image view and create an IBOutlet named imageView.

4. The ViewController.h file code is as follows:

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIImagePickerControllerDelegate>
{   
   UIImagePickerController *imagePicker;
   IBOutlet UIImageView *imageView;    
}
- (IBAction)showCamera:(id)sender;

@end

5. Modify ViewController.m as follows:

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

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

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

- (IBAction)showCamera:(id)sender {
    imagePicker.allowsEditing = YES;
    if ([UIImagePickerController isSourceTypeAvailable:
        UIImagePickerControllerSourceTypeCamera])
    {
        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    else{
        imagePicker.sourceType = 
        UIImagePickerControllerSourceTypePhotoLibrary;
    }
    [self presentModalViewController:imagePicker animated:YES];

}
-(void)imagePickerController:(UIImagePickerController *)picker 
  didFinishPickingMediaWithInfo:(NSDictionary *)info{
    UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
    if (image == nil) {    
        image = [info objectForKey:UIImagePickerControllerOriginalImage];
    }
    imageView.image = image;
    
}

-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [self dismissModalViewControllerAnimated:YES];
}

@end

Output

When you run the application and click the Show Camera button, we will get the following output.

Once a photo is taken, you can edit the image by moving and zooming, as shown below.

Other Extensions