Using the camera gallery picker or taking a photo on the iPhone in iOS

gistfile1.txt

//in your header
@property (weak, nonatomic) IBOutlet UIButton *ProfilePictureButton;

UIViewController <UIImagePickerControllerDelegate, UIActionSheetDelegate>

//in your implementation
@synthesize ProfilePictureButton = _profilePictureButton;

//implementation details
[self setProfilePictureButton:nil];

- (IBAction)ProfilePictureButtonClick:(UIButton *)sender {
 
    //If the device has a camera, allow a choice via an action sheet
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        NSLog(@"Device has a camera, will show ActionSheet for a choice");
        UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle: nil
                                                                 delegate: self
                                                        cancelButtonTitle: @"Cancel"
                                                   destructiveButtonTitle: nil
                                                        otherButtonTitles: @"Take Photo",
                                      @"Choose Existing Photo", nil];
        [actionSheet showFromRect: _profilePictureButton.frame inView: _profilePictureButton.superview animated: YES];
    } else {
        NSLog(@"Device does not have a camera, will show gallery");
        //otherwise, if it doesn't have a camera, just go ahead and show the picker
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        picker.allowsEditing = YES;
        [self presentModalViewController:picker animated:YES];
    }
 
}

-(void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
 
    //Show the picker but only from whatever choice the user made
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    NSString *buttonTitleAtButtonIndex = [actionSheet buttonTitleAtIndex:buttonIndex];
    if ([buttonTitleAtButtonIndex isEqualToString:@"Take Photo"]) {
        // take photo...
        NSLog(@"User decided to take a photo");
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
        [self presentModalViewController:picker animated:YES];
    } else if ([buttonTitleAtButtonIndex isEqualToString:@"Choose Existing Photo"]) {
        // choose existing photo...
        NSLog(@"User decided to pick from the gallery");
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentModalViewController:picker animated:YES];
    }
 
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *) Picker {
 
    NSLog(@"imagePickerControllerDidCancel called");
    [Picker dismissModalViewControllerAnimated:YES];
 
}

- (void)imagePickerController:(UIImagePickerController *) Picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
 
}

- (void)imagePickerController:(UIImagePickerController *) Picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
 
    NSLog(@"didFinishPickingMediaWithInfo called");
    UIImage *selectedImage = [info objectForKey:UIImagePickerControllerEditedImage];
 
    //allows editing is TRUE, if you will notice in my picker alloc.
    //scale box down to 200x200 - reference above kangaroo cropper
    float actualHeight = 200.0;
    float actualWidth = 200.0;
    CGRect rect = CGRectMake(0.0, 0.0, actualWidth, actualHeight);
    UIGraphicsBeginImageContext(rect.size);
    [selectedImage drawInRect:rect];
    UIImage *croppedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
 
    //dismiss the picker
    [Picker dismissModalViewControllerAnimated:YES];
 
    //get a path to the local documents directory
    NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *pathToProfilePicture = [NSString pathWithComponents:[NSArray arrayWithObjects:documentsDirectory, @"userprofilepicture", nil]];
 
    //delete the local profile picture, if one exists already
    BOOL profilePictureFileExists = [[NSFileManager defaultManager] fileExistsAtPath:pathToProfilePicture];
    if (profilePictureFileExists) {
        NSLog(@"User profile picture exists, we will delete it now");
        [[NSFileManager defaultManager] removeItemAtPath:pathToProfilePicture error:nil];
    }
 
    //now create the file
    BOOL createdFileOk = [[NSFileManager defaultManager] createFileAtPath:pathToProfilePicture contents:nil attributes:nil];
    if (!createdFileOk) {
        NSLog(@"Error creating profile picture image file to write to on disk %@", pathToProfilePicture);
    } else {
        NSLog(@"Writing profile picture image file to disk...");
        NSFileHandle* profilePictureHandle = [NSFileHandle fileHandleForWritingAtPath:pathToProfilePicture];
        [profilePictureHandle writeData:UIImagePNGRepresentation(croppedImage)];
        [profilePictureHandle closeFile];
        _pictureProfileDirtyBit = @"N";
        NSLog(@"Writing profile picture complete");
 
        //show the image you just saved
        [_profilePictureButton setImage:croppedImage forState:UIControlStateNormal];
 
        //now asynchronously bump this picture up to the web
        //I might give you the guts of how to upload something like this to a web service listening for such information, but not in this post
        dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0);
        dispatch_async(queue, ^{[self uploadMyNewPictureToWeb];});
 
    }
 
}