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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