ios开发之swift图片多选，取消选择模型

以下代码未完全实现多选功能，仅仅为中间过程，作为自己复习使用。因为经过优化的代码，最终会忘记中间的过程。
读取本地图片，然后列出，然后可以多选，可以取消选择

//
//  ViewController.swift
//  imageTest
//
//  Created by  on 15/11/30.
//  Copyright (c) 2015年 JS. All rights reserved.
//
 
import UIKit
import AssetsLibrary
 
class ViewController: UIViewController {
    //资源库管理类
    var assetsLibrary =  ALAssetsLibrary()
    //保存照片集合
    var assets = [ALAsset]()
 
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        var countOne = 0
 
        var qix = 0;
 
 
        let registerBtn : UIButton = UIButton()
        registerBtn.frame = CGRectMake(10, 200, 300, 40)
        registerBtn.backgroundColor = UIColor.lightGrayColor()
        registerBtn.setTitle("注册", forState: UIControlState.Normal)
        registerBtn.addTarget(self, action: "goRegister:", forControlEvents: UIControlEvents.TouchUpInside)
        self.view.addSubview(registerBtn)
 
 
        //被读取的数据， 当前函数内无法读取到asset的数据，必须有另外一个动作触发，所以弄了个按钮，下一步动作
        //ALAssetsGroupSavedPhotos表示只读取相机胶卷（ALAssetsGroupAll则读取全部相簿）
        assetsLibrary.enumerateGroupsWithTypes(ALAssetsGroupSavedPhotos, usingBlock: {
            (group: ALAssetsGroup!, stop) in
            print("is goin:")
            if group != nil
            {
                let assetBlock : ALAssetsGroupEnumerationResultsBlock = {
                    (result: ALAsset!, index: Int, stop) in
                    if result != nil
                    {
 
                        self.assets.append(result)//装载图片
                        qix = countOne%6;
 
                        var pos_x:CGFloat = CGFloat(10 + Int(qix*55) );
                        var pos_y:CGFloat = CGFloat(40 + Int(countOne/6 * 55));
 
                        //取缩略图
                        let image = UIImage(CGImage:result.thumbnail().takeUnretainedValue())
                        var imageView = UIImageView(frame: CGRectMake(pos_x, pos_y, 50, 50))
                        imageView.image = image
                        imageView.userInteractionEnabled = true;//点击手势
                        var singleTap:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "imageViewTouch:")
                        imageView .addGestureRecognizer(singleTap)
                        imageView.tag = countOne
 
                        //边框颜色设置
                        imageView.layer.borderColor = UIColor.grayColor().CGColor
                        //边框的宽度设置
                        imageView.layer.border
                        // 最主要的一句
                        imageView.layer.masksToBounds = true
                        //把uiimageview加载到父控件上，也就是self.view
                        self.view.addSubview(imageView)
 
 
                        qix++
                        countOne++
 
                    }
                }
 
 
                group.enumerateAssetsUsingBlock(assetBlock)
                print("assets:(countOne)")
                //collectionView网格重载数据
                //self.collectionView?.reloadData()
                println("======");
            }
 
            }, failureBlock: { (fail) in
                print(fail)
        })
 
    }
 
    func imageViewTouch(gestur:UITapGestureRecognizer){
        println("我被摸了!!");
        let x = gestur.view?.tag
 
        print(assets[x!])
 
        let countOne = x //还原countOne
        var qix = countOne!%6;
 
        var pos_x:CGFloat = CGFloat(10 + Int(qix*55) );
        var pos_y:CGFloat = CGFloat(40 + Int(countOne!/6 * 55));
 
        let image = UIImage(CGImage:assets[x!].thumbnail().takeUnretainedValue())
        var imageView = UIImageView(frame: CGRectMake(pos_x, pos_y, 50, 50))
        imageView.image = image
 
        imageView.userInteractionEnabled = true;//点击手势
        var singleTap:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "imageViewTouch2:")
        imageView .addGestureRecognizer(singleTap)
        imageView.tag = countOne!
 
        //边框颜色设置
        imageView.layer.borderColor = UIColor.redColor().CGColor
        //边框的宽度设置
        imageView.layer.border
        // 最主要的一句
        imageView.layer.masksToBounds = true
        //把uiimageview加载到父控件上，也就是self.view
        self.view.addSubview(imageView)
 
    }
 
    //取消摸
    func imageViewTouch2(gestur:UITapGestureRecognizer){
        println("我被摸了!!");
        let x = gestur.view?.tag
 
        print(assets[x!])
 
        let countOne = x //还原countOne
        var qix = countOne!%6;
 
        var pos_x:CGFloat = CGFloat(10 + Int(qix*55) );
        var pos_y:CGFloat = CGFloat(40 + Int(countOne!/6 * 55));
 
        let image = UIImage(CGImage:assets[x!].thumbnail().takeUnretainedValue())
        var imageView = UIImageView(frame: CGRectMake(pos_x, pos_y, 50, 50))
        imageView.image = image
 
        imageView.userInteractionEnabled = true;//点击手势
        var singleTap:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "imageViewTouch:")
        imageView .addGestureRecognizer(singleTap)
        imageView.tag = countOne!
 
        //边框颜色设置
        imageView.layer.borderColor = UIColor.grayColor().CGColor
        //边框的宽度设置
        imageView.layer.border
        // 最主要的一句
        imageView.layer.masksToBounds = true
        //把uiimageview加载到父控件上，也就是self.view
        self.view.addSubview(imageView)
 
    }
 
 
 
    @IBAction func goRegister(sender: AnyObject) {
 
        //展示图片列表
        var count = assets.count;
 
        for var index = 0; index < count; ++index {
            println("index is (index)")
        }
    }
 
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
 
 
}
更加简洁的办法是我们将imageView存入一个数组，然后利用这个数组来改变图片选择情况
var imgs = [UIImageView]()

//点击，边框变红色
    func imageViewTouchArr(gestur:UITapGestureRecognizer){
        let x = gestur.view?.tag
        var imageView = imgs[x!]
        var singleTap:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "imageViewTouchArrCancel:")
        imageView .addGestureRecognizer(singleTap)
        imageView.layer.borderColor = UIColor.redColor().CGColor
    }
    //点击取消边框
    func imageViewTouchArrCancel(gestur:UITapGestureRecognizer){
        let x = gestur.view?.tag
        var imageView = imgs[x!]
        var singleTap:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "imageViewTouchArr:")
        imageView .addGestureRecognizer(singleTap)
        imageView.layer.borderColor = UIColor.grayColor().CGColor
    }