Re: C-Arrays in Swift
Re: C-Arrays in Swift
- Subject: Re: C-Arrays in Swift
- From: "Gerriet M. Denkmann" <email@hidden>
- Date: Fri, 04 Jul 2014 13:46:51 +0700
On 4 Jul 2014, at 07:19, Roland King <email@hidden> wrote:
> I was going to say read this
>
> https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/BuildingCocoaApps/InteractingWithCAPIs.html
Good advice. But this seems to be just the chapter “Interacting with C APIs” in the book: “Using Swift with Cocoa and Objective-C.” which I have read repeatedly.
As you said: this is somewhat short on usable examples.
>
> On 3 Jul, 2014, at 11:50 pm, Gerriet M. Denkmann <email@hidden> wrote:
>
>> In Objective-C I have:
>>
>> NSUInteger nbrOfInts = someObject.nbrOfUnsignedInts;
>> const NSUInteger *someInts = someObject.arrayOfUnsignedInts;
>>
>> for( NSUInteger intIndex = 0; intIndex < nbrOfInts; intIndex ++ )
>> {
>> NSUInteger anInt = someInts[intIndex] ;
>> }
Converted to Swift this now is:
let nbrOfInts = someObject.nbrOfUnsignedInts
let someIntPointer : CConstPointer<Int> = someObject.arrayOfUnsignedInts
let someInts = UnsafePointer<Int>(someIntPointer)
for index in 0..nbrOfInts
{
println( "int[\(index)] = \(someInts[index])" )
}
and it seems to be working.
One strange point though:
My int array contains NSUIntegers, but:
let someIntPointer : CConstPointer<UInt> = someObject.arrayOfUnsignedInts
does not work.
Thanks a lot for your most valuable help!
Kind regards
Gerriet.
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