Instance MethodFoundationEssentials
copyBytes(to:)
iOS 8.0+
iPadOS 8.0+
Mac Catalyst 8.0+
macOS 10.10+
tvOS 9.0+
watchOS 2.0+
Copies the bytes of data from the type into a raw memory buffer.
@discardableResult func copyBytes(to ptr: UnsafeMutableRawBufferPointer) -> IntParameters
ptrA pointer to the raw memory buffer you want to copy the bytes into.
Return Value
The number of bytes copied.
Discussion
The following example copies the bytes from the raw memory buffer into the provided raw memory buffer:
let source: [UInt8] = [0, 1, 2]
var dest: [UInt8] = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]
dest.withUnsafeMutableBytes { destBufferPtr in
let count = source.copyBytes(to: destBufferPtr)
// count == 3
}
// dest = [0x00, 0x01, 0x02, 0xFF, 0xFF, 0xFF]