Swift中获取相册图片与保存到相册

关于这个网上目前位置记录的资料比较少，记录一下这个坑

获取相册图片

var iPC = UIImagePickerController()
        iPC.sourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum
        iPC.delegate = self
        presentViewController(iPC, animated: true) { () -> Void in
            print("complete")
        }

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
//        println(info)

        let img = info["UIImagePickerControllerOriginalImage"] as! UIImage
        let pV = PhotoView(frame: paintView.frame, img: img)
        view.addSubview(pV)
        pV.delegate = self
        photoView = pV
        dismissViewControllerAnimated(true, completion: nil)
    }

保存到系统相册

func save(){
       UIGraphicsBeginImageContextWithOptions(bounds.size, false, 0.0)
       var ctx = UIGraphicsGetCurrentContext()
       layer.renderInContext(ctx)
       let img = UIGraphicsGetImageFromCurrentImageContext()
       UIGraphicsEndImageContext()
       UIImageWriteToSavedPhotosAlbum(img, self, "image:didFinishSavingWithError:contextInfo:", nil)
   }

func image(image: UIImage, didFinishSavingWithError error: NSErrorNSError?, contextInfo:UnsafePointer<Void>){
//        if let r = error {
//            print(r)
//        }else{
//        let e:NSError? = error
        if let ee = error as NSError? {
            print(ee)
        }else{
            UIAlertView(title:nil, message: "保存成功！", delegate: nil, cancelButtonTitle: "确定").show()
        }
    }

以上代码在2015/7更新优化

Ref：

http://stackoverflow.com/questions/25108888/strugglig-to-convert-objective-c-selector-and-target-signature-to-swift

http://stackoverflow.com/questions/24101468/checking-optionals-for-nil-in-swift