9.Swift UIImagePickerController选取图片

IOS获取本机图片的方式比Android简单得多，而且代码很干净、简洁。

1.通过调用IOS提供好的UIImagePickerController去选取图片，同样也是一个Controller，需要我们通过presentViewController跳转。
2.如果要对UIImagePickerController选择的图片行为进行监听需要设置UIImagePickerController.delegate: protocol<UIImagePickerControllerDelegate, UINavigationControllerDelegate>?，可以看到这里需要实现两个协议，原来老版本中，只需要一个UIImagePickerControllerDelegate就只够了。
3.然后覆写UIImagePickerControllerDelegate.imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])方法，就可以监听到选择的图片。

class ViewController: UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate  {    @IBOutlet weak var iv: UIImageView!    private var imagePC:UIImagePickerController!    @IBAction func getImageBTonClick(sender: AnyObject) {        // 实例化UIImagePickerController        self.imagePC = UIImagePickerController()        // 设置UIImagePickerController数据源为：本机图片库        self.imagePC.sourceType = UIImagePickerControllerSourceType.PhotoLibrary        // 设置实现协议的类        self.imagePC.delegate = self        self.presentViewController(self.imagePC, animated: true, completion: nil)    }    /** UIImagePickerControllerDelegate.imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) 对UIImagePickerController选择图片监听 **/    func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {        self.iv.image = image        // 关闭UIImagePickerController        picker.dismissViewControllerAnimated(true, completion: nil)    }    override func viewDidLoad() {        super.viewDidLoad()        // Do any additional setup after loading the view, typically from a nib.    }    override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()        // Dispose of any resources that can be recreated.    }}

9.Swift UIImagePickerController选取图片

9.Swift UIImagePickerController选取图片

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