Swift_UIImagePickerController选择图片显示

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate,UINavigationControllerDelegate {

//跳转图库按钮
var selectButton:UIButton!
//显示图片
var imageView:UIImageView!

override func viewDidLoad() {
super.viewDidLoad()
//创建子视图
createSubViews()
}

//MARK: - 创建子视图
func createSubViews() {

self.imageView = UIImageView(frame: CGRectMake(80, 100, 200, 200))
self.imageView.backgroundColor = UIColor.blueColor()
self.view.addSubview(self.imageView)

self.selectButton = UIButton(type: UIButtonType.Custom)
self.selectButton.frame = CGRectMake(160, 350, 80, 40)
self.selectButton.backgroundColor = UIColor.purpleColor()
self.selectButton.setTitle("选择图片", forState: UIControlState.Normal)
self.selectButton.setTitleColor(UIColor.redColor(), forState: UIControlState.Normal)
self.selectButton.titleLabel?.font = UIFont.boldSystemFontOfSize(18)
//self.selectButton.addTarget(self, action: Selector(selectImageAction(self.selectButton)), forControlEvents: UIControlEvents.TouchUpInside)
//按钮的action:方法
self.selectButton.addTarget(self, action: "selectImageAction:", forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(self.selectButton)

}
//MARK: buttonAction
func selectImageAction(sender: AnyObject) {

let imagePC:UIImagePickerController = UIImagePickerController()
imagePC.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
imagePC.delegate = self
self.presentViewController(imagePC, animated: true, completion: nil)
print("button click")

}
//MARK: - UIImagePickerControllerDelegate
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {

//print("info = %@", info)
print("info = \(info)")
/*
UIImagePickerControllerOriginalImage, <UIImage: 0x7aedc800> size {4288, 2848} orientation 0 scale 1.000000
UIImagePickerControllerReferenceURL, assets-library://asset/asset.JPG?id=7FECF4BC-7660-4CC6-8BD2-39443E4A4181&ext=JPG
UIImagePickerControllerMediaType, public.image
for (a, b) in info {
print("\(a), \(b)")
}
*/
let img = info["UIImagePickerControllerOriginalImage"] as! UIImage
self.imageView.image = img
picker.dismissViewControllerAnimated(true, completion: nil)
}
internal func imagePickerControllerDidCancel(picker: UIImagePickerController) {
picker.dismissViewControllerAnimated(true) { () -> Void in
print("dismiss ok")
}
}

/*
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
*/

}