【www.bbyears.com--ios】
关键代码
代码如下
import AVFoundation
//获取摄像设备
let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
do{
//创建输入,输出流
let input =tryAVCaptureDeviceInput.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://stackoverflow.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()
}catchlet 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!) {
ifmetadataObjects.count > 0 {
session.stopRunning()
let object = metadataObjects[0]
let string: String = (object as AnyObject).stringValue
iflet url = URL(string: string) {
ifUIApplication.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)
}
}
}
}
}
DEMO效果：
下载地址：DEMO