040_swift_图形化实现冒泡排序

效果展示

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//
//  SortView.swift
//  DemoApp
//
//  Created by liuan on 2020/5/25.
//  Copyright © 2020 www.liuan.com. All rights reserved.
//冒泡算法
// 循环比较需排序的数列，如果他们的顺序错误就替换过来。重复这个操作，直到所有数组完成这个排列


//

import UIKit

class SortView: UIView {

    /*
    // Only override draw() if you perform custom drawing.
    // An empty implementation adversely affects performance during animation.
    override func draw(_ rect: CGRect) {
        // Drawing code
    }
    */
    override init(frame: CGRect) {
        super.init(frame: frame)
        self.frame = frame
    }
    required init?(coder: NSCoder) {
        fatalError("init has not been imlemented")
    }

    override func layoutSubviews() {
        let y:CGFloat = 300 - frame.height
        self.frame = frame
        self.frame.origin.y = y
//        根据自定义视图的高度。计算一个权重数值，用于沈城不同的背景颜色

        let weight = frame.height/200
        let color = UIColor(hue: weight, saturation: 1, brightness: 1, alpha: 1)
        self.backgroundColor = color
    }


}

//
//  ViewController.swift
//  sort
//
//  Created by liuan on 2020/5/25.
//  Copyright © 2020 liuan. All rights reserved.
//

import UIKit
extension Array{
    //交换位置 mutating为了修改数值
    fileprivate mutating func swap(i:Int,j:Int){
        let temp = self[i]
        self[i] = self[j]
        self[j] = temp
    }
}
//对具有可比较性的数组，进行扩展。实现冒泡排序功能
extension Array where Element:Comparable{
    mutating func bubbleSort(){
        //从第一个元素 到倒数第二个元素
        for i in 0..<self.count-1
        {
            //            从数组的尾部开始，向上一个循环语句遍历到的元素进行遍历
            for j in (i+1...self.count-1).reversed(){
                if self[j] < self[j-1]{
                    swap(i: j, j: j-1)
                }
            }

        }
    }
}


class ViewController: UIViewController {
    var result:Array<Int> = Array<Int>()
    var date : Date!
    var temView:Array<SortView> = Array<SortView>()
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        initTempDate()
        let bt = UIButton(frame: CGRect(x: 10, y: 340, width: 400, height: 40))
        bt.backgroundColor = .orange
        bt.setTitle("冒泡排序", for: .normal)
        bt.addTarget(self, action: #selector(reOrderView), for: .touchUpInside)
        self.view.addSubview(bt)

        let bt2 = UIButton(frame: CGRect(x: 10, y: 400, width: 400, height: 40))
        bt2.backgroundColor = .orange
        bt2.setTitle("复原", for: .normal)
        bt2.addTarget(self, action: #selector(reBegin), for: .touchUpInside)
        self.view.addSubview(bt2)
    }
    @objc func reOrderView(){
        date=Date()
        // 在一个全局队列中，以异步的当时对数组进行排序。并实时调整和数组中的数组值向对应的视图的位置

        DispatchQueue.global().async {
            for i in 0..<self.result.count-1{
                for j in (i+1...self.result.count-1).reversed(){
                    if(self.result[j]<self.result[j-1]){
                        weak var weak_self = self

                                           //修改界面要在主线程
                                           DispatchQueue.main.async {
                                               let view1 = weak_self?.view.viewWithTag(j+1)
                                                  let view2 = weak_self?.view.viewWithTag(j)
                                               let posX1 = view1?.frame.origin.x
                                               let posX2=view2?.frame.origin.x

                                               view1?.frame.origin.x=posX2!
                                               view2?.frame.origin.x=posX1!

                                               view1?.tag=j
                                               view2?.tag=j+1
                                               self.result.swap(i: j, j: j-1)

                                           }
                                        Thread.sleep(forTimeInterval: 0.01)
                    }

                }
            }
        }

        let endDate=Date()
        print(endDate.timeIntervalSince(self.date))
    }
    func initTempDate(){
        var array:Array<Int> = Array<Int>()
        for i in 1...100
        {
            array.append(i)
        }
        result.removeAll()
        for _ in 1...100{
            //根据数组的长度，获得一个1至100的随机数
            let temp = Int(arc4random() % UInt32(array.count))+1
            let num = array[temp-1]
            result.append(num)
            //从原来数组中移出该元素。防止重复
            array.remove(at: temp-1)
        }
        temView.removeAll()
        for i in 1...100{
            let num = result[i-1]
            let view = SortView(frame: CGRect(x: 10+i*3, y: 200, width: 2, height: num*2))
            view.backgroundColor = .black
            view.tag = i
            temView.append(view)
            self.view.addSubview(view)

        }
    }
    @objc func reBegin(){
        for x in temView{
            self.view.viewWithTag(x.tag)?.removeFromSuperview()
               }
        initTempDate()
        }



}