二維的比較簡單,先講二維的好了
不用ZXing,直接用CG--CoreGraphic套件就可以了
============================================
/*
Correction level option as below:
L, // Level L (Low)
7% of codewords can be restored.
M, // Level M (Medium) 15% of codewords can be restored.
Q, // Level Q (Quartile) 25% of codewords can be restored.
H // Level H (High) 30% of codewords can be restored.
*/
CoreImage.CIQRCodeGenerator ciQrCodeGen = new CoreImage.CIQRCodeGenerator() {
Message = NSData.FromString("這裡面可以裝下1700多個漢字,請好好發揮了"),
CorrectionLevel = "L",
};
var context = CoreImage.CIContext.FromOptions(null);
//假設有個UIImageView叫imgQrCode,放置二維條碼
imgQrCode.Image=UIImage.FromImage(
context.CreateCGImage(ciQrCodeGen.OutputImage,ciQrCodeGen.OutputImage.Extent)
);
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相形之下,一維比較麻煩(以39碼為例):
---------------------------step1:-------------------------------------------------------
public interface IBarcodeService {
Stream ConvertImageStream(string text, int width = 300, int height = 130);
}
---------------------------step2:-------------------------------------------------------
class BarcodeService : IBarcodeService {
public Stream ConvertImageStream(string text, int width = 300, int height = 130) {
var barcodeWriter = new ZXing.Mobile.BarcodeWriter {
Format = ZXing.BarcodeFormat.CODE_39,
Options = new ZXing.Common.EncodingOptions {
Width = width,
Height = height,
Margin = 10
}
};
barcodeWriter.Renderer = new ZXing.Mobile.BitmapRenderer();
var bitmap = barcodeWriter.Write(text);
var stream = bitmap.AsPNG().AsStream(); // this is the difference
stream.Position = 0;
return stream;
}
---------------------------step3:-------------------------------------------------------
//假設我們要把一維條碼繪在UIImageView "imgCode39"上面...
var stream =new Barcode.BarcodeService().ConvertImageStream("10607UP197419461A5B");
imgCode39.Image= UIImage.LoadFromData(Foundation.NSData.FromStream(stream));
參考:
https://forums.xamarin.com/discussion/28161/barcode-rendering-with-zxing-net-in-my-xamarin-forms-app
大家加油了
