ios - Swift 3 在 1 行中检测多个条码
<p><p>您好，我正在使用 <code>swift3</code> 和 <code>AVFoundation</code> 来检测账单的条形码。我的账单在 1 行中最多有 3 个条形码。怎样才能将全部条码合并为一串，并在检测到该行中的所有条码并合并为一串后才停止操作？</p>
<p><strong>这是我的账单样本</strong> </p>
<p> <a href="/image/WggAx.png" rel="noreferrer noopener nofollow"><img src="/image/WggAx.png" alt="enter image description here"/></a> </p>
<p>底部有3个条形码</p>
<p><strong>这是我的 AVCaptureMetadataOutputObjectsDelegate 函数</strong></p>
<pre><code>func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: !, from connection: AVCaptureConnection!) {
// This is the delegate'smethod that is called when a code is readed
for metadata in metadataObjects {
let readableObject = metadata as! AVMetadataMachineReadableCodeObject
let code = readableObject.stringValue
self.dismiss(animated: true, completion: nil)
self.delegate?.barcodeReaded(barcode: code!)
print(code!)
print(readableObject.type)
}
}
</code></pre>
<p>我们如何修改上面的来扫描所有3个条码并将它们组合起来，当所有条码都被解码时通知<code>Viewcontroller</code>？非常感谢任何帮助。谢谢</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>不要停止扫描，除非检测到 3 个条码然后组合代码:</p>
<pre><code>func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: !, from connection: AVCaptureConnection!) {
// This is the delegate'smethod that is called when a code is headed
guard metadataObjects.count == 3 else { return }
var finalString: String = ""
for metadata in metadataObjects {
let readableObject = metadata as! AVMetadataMachineReadableCodeObject
let code = readableObject.stringValue
finalString.append(code!)
print(code!)
print(readableObject.type)
}
self.dismiss(animated: true, completion: nil)
self.delegate?.barcodeReaded(barcode: finalString)
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - Swift 3 在 1 行中检测多个条码，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/40398896/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/40398896/
</a>
</p>
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