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我有這個代碼捕獲條形碼;它可以正常工作,除了在iPad上以外,如果你不能保持iPad穩定,它會「在奶牛回家時嘗試」,如果你有漂移的話。我想添加一個「取消」按鈕或找出一些方法來取消該方法,所以我不必殺死該應用程序並重新啓動它。這是我的代碼:如何添加'取消'按鈕到相機採集代碼?
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection {
CGRect highlightViewRect = CGRectZero;
AVMetadataMachineReadableCodeObject *barCodeObject;
NSString *detectionString = nil;
NSArray *barCodeTypes = @[AVMetadataObjectTypeEAN13Code];
for (AVMetadataObject *metadata in metadataObjects) {
for (NSString *type in barCodeTypes) {
if ([metadata.type isEqualToString:type])
{
barCodeObject = (AVMetadataMachineReadableCodeObject *)[_prevLayer transformedMetadataObjectForMetadataObject:(AVMetadataMachineReadableCodeObject *)metadata];
highlightViewRect = barCodeObject.bounds;
detectionString = [(AVMetadataMachineReadableCodeObject *)metadata stringValue];
break;
}
}
if (detectionString != nil) {
_label.text = detectionString;
oISBNField.text = detectionString; // move detectionString to ISBN textbox
[_session stopRunning];
[_prevLayer removeFromSuperlayer];
[_label removeFromSuperview];
break;
}
else
_label.text = @"(none)";
}
}
有人可以請給我一些幫助嗎?我真的,真的很感激它! :D
我花了一段時間才知道原來的代碼在做什麼(由於沒有評論),但它現在像一個冠軍!非常感謝! – SpokaneDude 2014-10-07 23:25:49