This project forked from sunnyzl/zlqrcodecontroller
二维码扫描控制器，可扫描二维码和条形码
##使用方法 ZLQRCodeViewController *qr = [[ZLQRCodeViewController alloc] initWithScanResultHandler:^(AVMetadataMachineReadableCodeObject *metaObject) { NSLog(@"%@", metaObject.stringValue); }];
qr.type = ZLQRCodeCameraManagerMetaDataTypeQR;
if (qr) {
[self presentViewController:qr animated:YES completion:nil];
}
默认的扫描模式为ZLQRCodeCameraManagerMetaDataTypeQR，可选择二维码、条形码或者同时扫描二维码和条形码
在此需要判断二维码控制器是否为空，可以根据需要自己选择push或者modal，并输入相应代码.
##效果图
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