How about:
typealias PixelTuple = (red: UInt8, green: UInt8, blue: UInt8, brightness:
UInt8)
let pixelCount = 10
let pointer = UnsafeMutableRawPointer.allocate(bytes: 4*pixelCount, alignedTo:
16)
defer {
pointer.deallocate(bytes: 4*pixelCount, alignedTo: 16)
}
let tuplesPointer = pointer.bindMemory(to: PixelTuple.self, capacity:
pixelCount)
let tuples = UnsafeMutableBufferPointer(start: tuplesPointer, count: pixelCount)
for tuple in tuples {
print(tuple.red, tuple.green, tuple.blue, tuple.brightness)
}
> On Jan 27, 2017, at 3:27 AM, TUNG CK via swift-users <swift-users@swift.org>
> wrote:
>
> Python, we have this
> for pixel in pixels:
> r, g, b, brightness = pixel
> .....
>
> I wonder how to do it in swift? is there a more swifty way to do something
> like this below?
> for pixel in pixels {
> var r = pixel[0]
> var g = pixel[1]
> var b = pixel[2]
> var brightness = pixel[3]
> .....
> }
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