How do I manipulate binary digits in Data or NSData object using Swift in an iOS Xcode project or an Xcode Playground?

Asked Jun 26 '19 at 15:06

Active Jun 28 '19 at 12:44

Viewed 196 times

I am using Swift in an iOS Xcode project. I would like to use the Data or NSData object in the Apple Foundation and UIKit Frameworks to manipulate binary data so that each binary digit represents a boolean value -- 0 being false, and 1 being true.

How would I do that?

I would save the Data object in CloudKit as a field of type Bytes.

If there is an easier or more practical way for me to use boolean values that takes less memory and is more efficient, please suggest it to me.

I seem to recall there was a way to format numbers to a binary expression. That would help me accomplish my objective.

edited Jun 26 '19 at 15:12

asked Jun 26 '19 at 15:06

daniel

1,446
3
29
65

1

Every digit? Or every bit? Because that's even using less memory to use a bit for a boolean than a "hex digit" if I understood correctly which is a Byte. – Larme Jun 26 '19 at 15:14
@Larme Yes. That's what I'm trying to learn how to do. – daniel Jun 26 '19 at 15:15
@Larme, `hex digit` would be *half* of byte – user28434'mstep Jun 26 '19 at 15:25
@Larme I thought we would need to use other than a hex digit. – daniel Jun 26 '19 at 15:26
Good point, half digit. Are looking for bitfields? – Larme Jun 26 '19 at 15:28
@Larme I don't know what to call what I'm looking for. I'm open to any ideas. I'm not even sure what a bitfield is. – daniel Jun 26 '19 at 15:30

How do I manipulate binary digits in Data or NSData object using Swift in an iOS Xcode project or an Xcode Playground?

0 Answers0