IOS Swift 开发QRCore(二维码)实例详解

1、搭个界面


2、写代码

//

// ViewController.swift

// GeneratorQRCode

//

// Created by targetcloud on 2016/12/3.

// Copyright © 2016年 targetcloud. All rights reserved.

//

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var qrImg: UIImageView!

@IBOutlet weak var qrContent: UITextView!

@IBAction func generatorQRImg(_ sender: Any) {

view.endEditing(true)

let str = qrContent.text ?? ""

let filter = CIFilter(name: "CIQRCodeGenerator")

filter?.setDefaults()

let data = str.data(using: String.Encoding.utf8)

filter?.setValue(data, forKey: "inputMessage")

filter?.setValue("M", forKey: "inputCorrectionLevel")

var image = filter?.outputImage

let transform = CGAffineTransform(scaleX: 10, y: 10)//处理成为一个高清图片

image = image?.applying(transform)

var resultImage = UIImage(ciImage: image!)

let centerImg = UIImage(named: "targetcloud.png")

resultImage = mergeImage(resultImage, centerImg: centerImg!, drawSize:CGSize(width: 80, height: 80))

qrImg.image = resultImage

}

func mergeImage(_ sourceImage: UIImage, centerImg: UIImage,drawSize:CGSize) -> UIImage {

let size = sourceImage.size

UIGraphicsBeginImageContext(size)

sourceImage.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))

centerImg.draw(in: CGRect(x: (size.width - drawSize.width) * 0.5, y: (size.height - drawSize.height) * 0.5, width: drawSize.width, height: drawSize.height))

let resultImage = UIGraphicsGetImageFromCurrentImageContext()

UIGraphicsEndImageContext()

return resultImage!

}

}

3、运行效果



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