【www.bbyears.com--ios】
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.borderWidth = 1
// 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.borderWidth = 1
// 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.borderWidth = 1
// 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
}