UIImagePicker

// Show actionsheet
        NSString *actionSheetTitle = @"Add Photo"; //Action Sheet Title
        NSString *other1 = @"Take Photo";
        NSString *other2 = @"Choose from Gallery";
        NSString *cancelTitle = @"Cancel";
        
        UIActionSheet *actionSheet = [[UIActionSheet alloc]
                                      initWithTitle:actionSheetTitle
                                      delegate:self
                                      cancelButtonTitle:cancelTitle
                                      destructiveButtonTitle:nil
                                      otherButtonTitles:other1, other2, nil];
        
        [actionSheet showInView:self.view];

#pragma mark - UIActionSheetDelegate
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
    if (buttonIndex == 0) {
        [self takePhoto];
    }else if (buttonIndex == 1){
        [self choosePhotoFromGallery];
    }
}

-(void)choosePhotoFromGallery {
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.modalPresentationStyle = UIModalPresentationCurrentContext;
    imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePickerController.delegate = self;
    [self presentViewController:imagePickerController animated:YES completion:nil];
}

-(void)takePhoto {
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
        // There is not a camera on this device, so don't show the camera button.
        NSLog(@"No camera device");
    }else{
        UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
        imagePickerController.modalPresentationStyle = UIModalPresentationCurrentContext;
        imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
        imagePickerController.delegate = self;
        [self presentViewController:imagePickerController animated:YES completion:nil];
    }
}

#pragma mark - UIImagePickerControllerDelegate

// This method is called when an image has been chosen from the library or taken from the camera.
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
    UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage];
    if (image) {
        [_avatarButton setBackgroundImage:image forState:UIControlStateNormal];
    }
    [self dismissViewControllerAnimated:YES completion:NULL];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [self dismissViewControllerAnimated:YES completion:NULL];
}