After I convert from swift 2 to swift 3, there is an error pop up for the below metioned line
let value = UnsafePointer<UInt32>(array1).pointee
'init' is unavailable: use 'withMemoryRebound(to:capacity:_)' to temporarily view memory as another layout-compatible type.
in swift2 it is like
let value = UnsafePointer<UInt32>(array1).memory
Can someone explain please? Sorry I'm quite new to swift3
After i have make the changes to
let abc = UnsafePointer<UInt32>(array1).withMemoryRebound(to: <#T##T.Type#>, capacity: <#T##Int#>, <#T##body: (UnsafeMutablePointer<T>) throws -> Result##(UnsafeMutablePointer<T>) throws -> Result#>)
but still what value should go in to the variable? Sorry, i have search around but too bad i can't find a solution
You can try this:
let rawPointer = UnsafeRawPointer(array1)
let pointer = rawPointer.assumingMemoryBound(to: UInt32.self)
let value = pointer.pointee
Raw pointer is a pointer for accessing untype data.
assumingMemoryBound(to:)
can convert from an UnsafeRawPointer
to UnsafePointer<T>
.
Reference : Swift 3.0 Unsafe World
If array
is an Array
, your best bet is to use withUnsafeBufferPointer
:
array.withUnsafeBufferPointer { buffer in
// do something with 'buffer'
// (if you need an UnsafePointer rather than an UnsafeBufferPointer,
// you can access that via the buffer's .baseAddress property)
}
Make sure you don't let the buffer pointer escape from the closure, because it will not be valid outside it.
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