本文实例为大家分享了Swift3.0二维码扫描的具体代码，供大家参考，具体内容如下
关键代码
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import AVFoundation
//获取摄像设备
let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
do {
//创建输入,输出流
let input = try AVCaptureDeviceInput.init(device: device)
let output = AVCaptureMetadataOutput()
output.rectOfInterest = CGRect(x: 0.1, y: 0, width: 0.9, height: 1)
//设置代理,并且在主线程刷新
output.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
//初始化链接对象 / 高质量采集率
session.canSetSessionPreset(AVCaptureSessionPresetHigh)
session.addInput(input)
session.addOutput(output)
//先添加输入输出流,后设置支持的扫码所支持的格式,不然报错如下:Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[AVCaptureMetadataOutput setMetadataObjectTypes:] Unsupported type found - use -availableMetadataObjectTypes'
//http://*.com/questions/31063846/avcapturemetadataoutput-setmetadataobjecttypes-unsupported-type-found
//设置扫码支持的编码格式
output.metadataObjectTypes = [AVMetadataObjectTypeQRCode,AVMetadataObjectTypeEAN13Code,AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code]
let layer = AVCaptureVideoPreviewLayer(session: session)
layer?.videoGravity = AVLayerVideoGravityResizeAspectFill
layer?.frame = view.layer.bounds
view.layer.insertSublayer(layer!, at: 0)
//开始捕捉
session.startRunning()
} catch let error as NSError {
print("errorInfo\(error.domain)")
}
/// 实现代理方法
extension ScanCodeController:AVCaptureMetadataOutputObjectsDelegate {
func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) {
if metadataObjects.count > 0 {
session.stopRunning()
let object = metadataObjects[0]
let string: String = (object as AnyObject).stringValue
if let url = URL(string: string) {
if UIApplication.shared.canOpenURL(url) {
//去打开地址链接
_ = self.navigationController?.popViewController(animated: true)
UIApplication.shared.open(url)
} else {
//获取非链接结果
let alertViewController = UIAlertController(title: "扫描结果", message: (object as AnyObject).stringValue, preferredStyle: .alert)
let actionCancel = UIAlertAction(title: "退出", style: .cancel, handler: { (action) in
_ = self.navigationController?.popViewController(animated: true)
})
let actinSure = UIAlertAction(title: "再次扫描", style: .default, handler: { (action) in
self.session.startRunning()
})
alertViewController.addAction(actionCancel)
alertViewController.addAction(actinSure)
self.present(alertViewController, animated: true, completion: nil)
}
}
}
}
}
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DEMO效果：
下载地址：DEMO
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。