SwiftでUIImagePickerControllerを使用したテンプレ

import UIKit

class UIPickerViewSampleViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        selectImage()
    }
    
    private func selectImage() {
        let alertController = UIAlertController(title: "画像を選択", message: nil, preferredStyle: .ActionSheet)
        let cameraAction = UIAlertAction(title: "カメラを起動", style: .Default) { (UIAlertAction) -> Void in
            self.selectFromCamera()
        }
        let libraryAction = UIAlertAction(title: "カメラロールから選択", style: .Default) { (UIAlertAction) -> Void in
            self.selectFromLibrary()
        }
        let cancelAction = UIAlertAction(title: "キャンセル", style: .Cancel) { (UIAlertAction) -> Void in
            self.dismissViewControllerAnimated(true, completion: nil)
        }
        alertController.addAction(cameraAction)
        alertController.addAction(libraryAction)
        alertController.addAction(cancelAction)
        presentViewController(alertController, animated: true, completion: nil
    }
    
    private func selectFromCamera() {
        if UIImagePickerController.isSourceTypeAvailable(.Camera) {
            let imagePickerController = UIImagePickerController()
            imagePickerController.delegate = self
            imagePickerController.sourceType = UIImagePickerControllerSourceType.Camera
            imagePickerController.allowsEditing = true
            self.presentViewController(imagePickerController, animated: true, completion: nil)
        } else {
            print("カメラ許可をしていない時の処理")
        }
    }
    
    private func selectFromLibrary() {
        if UIImagePickerController.isSourceTypeAvailable(.PhotoLibrary) {
            let imagePickerController = UIImagePickerController()
            imagePickerController.delegate = self
            imagePickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
            imagePickerController.allowsEditing = true
            self.presentViewController(imagePickerController, animated: true, completion: nil)
        } else {
            print("カメラロール許可をしていない時の処理")
        }
    }
    
    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        if let image = info[UIImagePickerControllerEditedImage] {
            print(image)
        }
        picker.dismissViewControllerAnimated(true, completion: nil)
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}