Re: Converting to Swift
Re: Converting to Swift
- Subject: Re: Converting to Swift
- From: "Gerriet M. Denkmann" <email@hidden>
- Date: Mon, 11 Aug 2014 16:54:28 +0700
On 11 Aug 2014, at 16:05, Bavarious <email@hidden> wrote:
>
>> On 11 Aug 2014, at 05:53, Gerriet M. Denkmann <email@hidden> wrote:
>>
>>
>> On 11 Aug 2014, at 15:43, Bavarious <email@hidden> wrote:
>>
>>> On 11 Aug 2014, at 05:35, Gerriet M. Denkmann <email@hidden> wrote:
>>>>
>>>> I am trying to convert:
>>>> NSString * helperName = @"de.mdenkmann.Xpc-Exchange”;
>>>> CFDictionaryRef diref = SMJobCopyDictionary( kSMDomainSystemLaunchd, (__bridge CFStringRef)helperName );
>>>> NSDictionary *jobDict = (NSDictionary *)CFBridgingRelease(diref);
>>>> if ( jobDict == nil ) need to start the helper
>>>>
>>>> to Swift:
>>>> let name = xpcServiceName!
>>>> let diref = SMJobCopyDictionary( kSMDomainSystemLaunchd, name )
>>>> but get an error for name: "'NSString' is not a subtype of 'CFString'"
>>>>
>>>> let cref = CFString(name) → error: 'CFString' cannot be constructed because it has no accessible initializers
>>>>
>>>> How to get a CFString?
>>>
>>>
>>>
>>> let cfname = name as CFString
>>>
>>> should work.
>>
>> You are right: it should work.
>> But
>> let cref = name as CFString
>> again created the error: 'NSString' is not a subtype of 'CFString'
>>
>> Xcode 6 beta 5
>
> What is the type of xpcServiceName? If it’s a Swift string, you need to go through NSString first. If it’s an NSString, just as CFString should work.
>
> I get no compiler errors with this code:
>
> import Foundation
>
> let s = "string"
> let nss = s as NSString
> let cfs1 = s as NSString as CFString
> let cfs2 = nss as CFString
let name1 = xpcServiceName!
let name2 = name1 as NSString
let name3 = name2 as CFString
let diref = SMJobCopyDictionary( kSMDomainSystemLaunchd, name3 )
let jobDictionary = diref.takeRetainedValue() <--- I hope this is right
if jobDictionary == nil
{
println("Helper not running")
}
else
{
println("Helper JobCopyDictionary = \(jobDictionary)")
}
This works perfectly.
Thank you very much!
Kind regards,
Gerriet.
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