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macOS how create or generate barcode in cocoa?
- Thread starter mkristain
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What have you tried?
Please answer that question. Describe exactly what you tried, in order to find information on this subject. If you didn't try anything, then say that.
I tried this:
1. Select the title of your thread: how create or generate barcode in cocoa
2. Control-click it. A contextual menu appears.
3. Choose "Search in Google".
4. Look at the first page of results.
5. On that page is a link to this:
http://code.google.com/p/cocoa-touch-barcodes/
For more results, do the search yourself.
If you don't find anything useful, post again, describing exactly what you searched for. (This means you should take notes of what you search for, so you can tell us later what you did.)
You should also spend some time reading barcode articles on Wikipedia, so you can tell us exactly which barcode scheme you want to use. (The barcode article I linked is not the only one. See the links at the end of that article.)
You need to do some searching and reading, so you can accurately describe what you're looking for. There are dozens, if not hundreds, of different barcodes, used for different purposes. If you don't tell us which one, or what you're trying to do, how can we possibly answer your question?
Please answer that question. Describe exactly what you tried, in order to find information on this subject. If you didn't try anything, then say that.
I tried this:
1. Select the title of your thread: how create or generate barcode in cocoa
2. Control-click it. A contextual menu appears.
3. Choose "Search in Google".
4. Look at the first page of results.
5. On that page is a link to this:
http://code.google.com/p/cocoa-touch-barcodes/
For more results, do the search yourself.
If you don't find anything useful, post again, describing exactly what you searched for. (This means you should take notes of what you search for, so you can tell us later what you did.)
You should also spend some time reading barcode articles on Wikipedia, so you can tell us exactly which barcode scheme you want to use. (The barcode article I linked is not the only one. See the links at the end of that article.)
You need to do some searching and reading, so you can accurately describe what you're looking for. There are dozens, if not hundreds, of different barcodes, used for different purposes. If you don't tell us which one, or what you're trying to do, how can we possibly answer your question?
That link is also present on the Cocoa Touch Barcodes page I originally posted. So simply reading web-pages is another thing the OP should learn.
Well, I don't know too much about barcodes, and how you determine what the thickness of each bar is, or the thickness of the space between bars, that, I'm hoping you already know. A good starting point would be a custom NSView that draws the bars based on a code that's held in a string object. That's how I think I'd go about it.
IIUC, nearly all types of 1D (linear) and 2D (matrix) bar codes use some sort of reference lines to set the rhythm of the code. IOW, they are scalable: a dime-sized code will read just the same as a billboard-sized code, as long as the reader has the physical range and resolution to handle the image. Hence, the sensible cocoa approach is to generate the code using NSBezierPath methods that would be resolution-independent and cleanly resizable.