How do I convert UInt8 to Data?

Question

Created Jul ’19

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How do I convert UInt8 into an object of type Data and still keep it's original value, so that when I convert the Data object back to Uint8, I would get its original value?

Answered by OOPer in 368999022

You should better check the documentation of Data first.

Generally, Data is considered to be a collection of UInt8's, so it naturally keeps the original UInt8 values.

 //UInt8 to Data
let value: UInt8 = 123
let data = Data([value])
 
//Data to UInt8
let originalValue = data[0]
print(originalValue) //->123
 
//[UInt8] to Data
let arrValue: [UInt8] = [123, 234]
let arrData = Data(arrValue)
 
//Data to [UInt8]
let originalValues = Array(arrData)
print(originalValues) //->[123,234]

But, in many cases there are some ways you can handle your original values without converting Data to Array of UInt8.

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Answer 1

OOPer OP

Jul ’19

Accepted Answer

You should better check the documentation of Data first.

Generally, Data is considered to be a collection of UInt8's, so it naturally keeps the original UInt8 values.

 //UInt8 to Data
let value: UInt8 = 123
let data = Data([value])
 
//Data to UInt8
let originalValue = data[0]
print(originalValue) //->123
 
//[UInt8] to Data
let arrValue: [UInt8] = [123, 234]
let arrData = Data(arrValue)
 
//Data to [UInt8]
let originalValues = Array(arrData)
print(originalValues) //->[123,234]

But, in many cases there are some ways you can handle your original values without converting Data to Array of UInt8.

4

	//UInt8 to Data
	let value: UInt8 = 123
	let data = Data([value])

	//Data to UInt8
	let originalValue = data[0]
	print(originalValue) //->123

	//[UInt8] to Data
	let arrValue: [UInt8] = [123, 234]
	let arrData = Data(arrValue)

	//Data to [UInt8]
	let originalValues = Array(arrData)
	print(originalValues) //->[123,234]