基于swift3.0
1.扫描二维码
设置扫描会话,图层和输入输出
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//设置捕捉设备
let device = avcapturedevice.defaultdevice(withmediatype: avmediatypevideo)
do
{
//设置设备输入输出
let input = try avcapturedeviceinput(device: device)
let output = avcapturemetadataoutput()
output.setmetadataobjectsdelegate(self, queue: dispatchqueue.main)
//设置会话
let scansession = avcapturesession()
scansession.cansetsessionpreset(avcapturesessionpresethigh)
if scansession.canaddinput(input)
{
scansession.addinput(input)
}
if scansession.canaddoutput(output)
{
scansession.addoutput(output)
}
//设置扫描类型(二维码和条形码)
output.metadataobjecttypes = [
avmetadataobjecttypeqrcode,
avmetadataobjecttypecode39code,
avmetadataobjecttypecode128code,
avmetadataobjecttypecode39mod43code,
avmetadataobjecttypeean13code,
avmetadataobjecttypeean8code,
avmetadataobjecttypecode93code]
//预览图层
let scanpreviewlayer = avcapturevideopreviewlayer(session:scansession)
scanpreviewlayer?.videogravity = avlayervideogravityresizeaspectfill
scanpreviewlayer?.frame = view.layer.bounds
view.layer.insertsublayer(scanpreviewlayer!, at: 0)
//自动对焦
if (device?.isfocusmodesupported(.autofocus))!
{
do { try input.device.lockforconfiguration() } catch{ }
input.device.focusmode = .autofocus
input.device.unlockforconfiguration()
}
//设置扫描区域
notificationcenter.default.addobserver(forname: nsnotification.name.avcaptureinputportformatdescriptiondidchange, object: nil, queue: nil, using: {[weak self] (noti) in
output.rectofinterest = (scanpreviewlayer?.metadataoutputrectofinterest(for: self!.scanpane.frame))!
})
//保存会话
self.scansession = scansession
}
catch
{
//摄像头不可用
tool.confirm(title: "温馨提示", message: "摄像头不可用", controller: self)
return
}
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开始扫描
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if !scansession.isrunning
{
scansession.startrunning()
}
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扫描结果在代理方法中
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//扫描捕捉完成
extension scancodeviewcontroller : avcapturemetadataoutputobjectsdelegate
{
func captureoutput(_ captureoutput: avcaptureoutput!, didoutputmetadataobjects metadataobjects: [any]!, from connection: avcaptureconnection!)
{
//停止扫描
self.scanline.layer.removeallanimations()
self.scansession!.stoprunning()
//播放声音
tool.playalertsound(sound: "noticemusic.caf")
//扫完完成
if metadataobjects.count > 0
{
if let resultobj = metadataobjects.first as? avmetadatamachinereadablecodeobject
{
tool.confirm(title: "扫描结果", message: resultobj.stringvalue, controller: self,handler: { (_) in
//继续扫描
self.startscan()
})
}
}
}
}
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2.二维码生成
通过滤镜生成cgimage
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//2.二维码滤镜
let contentdata = self.data(using: string.encoding.utf8)
let fileter = cifilter(name: "ciqrcodegenerator")
fileter?.setvalue(contentdata, forkey: "inputmessage")
fileter?.setvalue("h", forkey: "inputcorrectionlevel")
let ciimage = fileter?.outputimage
//3.颜色滤镜
let colorfilter = cifilter(name: "cifalsecolor")
colorfilter?.setvalue(ciimage, forkey: "inputimage")
colorfilter?.setvalue(cicolor(cgcolor: qrcodecolor.cgcolor), forkey: "inputcolor0")// 二维码颜色
colorfilter?.setvalue(cicolor(cgcolor: qrcodebgcolor.cgcolor), forkey: "inputcolor1")// 背景色
//4.生成处理
let outimage = colorfilter!.outputimage
let scale = qrcodesize / outimage!.extent.size.width;
let transform = cgaffinetransform(scalex: scale, y: scale)
let transformimage = colorfilter!.outputimage!.applying(transform)
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通过cgimage生成uiimage
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let image = uiimage(ciimage: ciimage)
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绘制logo和边框
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// 绘制logo
uigraphicsbeginimagecontextwithoptions(image.size, false, uiscreen.main.scale)
image.draw(in: cgrect(x: 0, y: 0, width: image.size.width, height: image.size.height))
//线框
let logoborderlineimagae = qrcodelogo.getroundrectimage(size: logowidth, radius: radius, borderwidth: borderlinewidth, bordercolor: borderlinecolor)
//边框
let logoborderimagae = logoborderlineimagae.getroundrectimage(size: logowidth, radius: radius, borderwidth: boderwidth, bordercolor: bordercolor)
logoborderimagae.draw(in: logoframe)
let qrcodeimage = uigraphicsgetimagefromcurrentimagecontext()
uigraphicsendimagecontext()
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封装接口:
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/**
1.生成二维码
- returns: 黑白普通二维码(大小为300)
*/
func generateqrcode() -> uiimage
/**
2.生成二维码
- parameter size: 大小
- returns: 生成带大小参数的黑白普通二维码
*/
func generateqrcodewithsize(size:cgfloat?) -> uiimage
/**
3.生成二维码
- parameter logo: 图标
- returns: 生成带logo二维码(大小:300)
*/
func generateqrcodewithlogo(logo:uiimage?) -> uiimage
/**
4.生成二维码
- parameter size: 大小
- parameter logo: 图标
- returns: 生成大小和logo的二维码
*/
func generateqrcode(size:cgfloat?,logo:uiimage?) -> uiimage
/**
5.生成二维码
- parameter size: 大小
- parameter color: 颜色
- parameter bgcolor: 背景颜色
- parameter logo: 图标
- returns: 带logo、颜色二维码
*/
func generateqrcode(size:cgfloat?,color:uicolor?,bgcolor:uicolor?,logo:uiimage?) -> uiimage
/**
6.生成二维码
- parameter size: 大小
- parameter color: 颜色
- parameter bgcolor: 背景颜色
- parameter logo: 图标
- parameter radius: 圆角
- parameter borderlinewidth: 线宽
- parameter borderlinecolor: 线颜色
- parameter boderwidth: 带宽
- parameter bordercolor: 带颜色
- returns: 自定义二维码
*/
func generateqrcode(size:cgfloat?,color:uicolor?,bgcolor:uicolor?,logo:uiimage?,radius:cgfloat,borderlinewidth:cgfloat?,borderlinecolor:uicolor?,boderwidth:cgfloat?,bordercolor:uicolor?) -> uiimage
使用
dispatchqueue.global().async {
let image = content.generateqrcodewithlogo(logo: self.logoimageview.image)
dispatchqueue.main.async(execute: {
self.qrcodeimageview.image = image
})
}
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3.识别二维码
通过cidetector识别二维码
cidetector用于分析ciimage，以得到cifeature，每个cidetector都要用一个探测器类型（nsstring）来初始化。这个类型用于告诉探测器要找什么特征
1.识别图片二维码
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func recognizeqrcode() -> string?
{
let detector = cidetector(oftype: cidetectortypeqrcode, context: nil, options: [cidetectoraccuracy : cidetectoraccuracyhigh])
let features = detector?.features(in: coreimage.ciimage(cgimage: self.cgimage!))
guard (features?.count)! > 0 else { return nil }
let feature = features?.first as? ciqrcodefeature
return feature?.messagestring
}
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使用实例
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dispatchqueue.global().async {
let recognizeresult = self.sourceimage?.recognizeqrcode()
let result = recognizeresult?.characters.count > 0 ? recognizeresult : "无法识别"
dispatchqueue.main.async {
tool.confirm(title: "扫描结果", message: result, controller: self)
self.activityindicatoryview.stopanimating()
}
}
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本文demo地址：qrcode.rar
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.jianshu.com/p/93d7a4b9b8f6