如何使用.boundingbox在Swift中的条形码周围绘制边框？
我有一个带条形码扫描仪的应用程序，当应用程序扫描时，我想在条形码周围绘制一个盒子。我想我可以使用.boundingbox来完成此操作，但是我不确定该如何处理。
这是我现在对条形码处理程序的设置：
func barcodeRequestHandler(request: VNRequest, error: Error?) {
guard let results = request.results as? [VNBarcodeObservation],
let payloadStringValue = results.last?.payloadStringValue,
let box = results.last?.boundingBox
else {
return
}
// I think I can do something with 'box' here
}
这用于创建vndetectbarcodesrequest，该将传递给vnimagerequesthandler.perform（）函数。
我试图找到一种用CashApeLayer绘制盒子的方法，但尚未找到一种使该工作的方法。条形码扫描系统中是否内置了一些东西，可以让我在条形码周围画一个盒子？还是我可以使用边界框绘制它的不同方式？
I have an app with a barcode scanner, and I would like to draw a box around the barcode when the app scans it. I think I can do this with .boundingBox but I am not really sure how to go about this.
Here is my setup for the barcode handler right now:
func barcodeRequestHandler(request: VNRequest, error: Error?) {
guard let results = request.results as? [VNBarcodeObservation],
let payloadStringValue = results.last?.payloadStringValue,
let box = results.last?.boundingBox
else {
return
}
// I think I can do something with 'box' here
}
This is used to create a VNDetectBarcodesRequest, which is passed to a VNImageRequestHandler.perform() function.
I have tried to find a way to draw the box with a CAShapeLayer, but haven't yet found a way to make that work. Is there something built into the barcode scanning system that would let me draw a box around the barcode? Or a different way I can use the bounding box to draw it?
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检查此
Check if this link is useful. It is not related to border but you will get an idea about boundingbox.