I'm pulling my bundle url and class name from a string, and I'd like to instantiate an object.
The code looks like this:
var cocoaViewBundleURL = cocoaViewInfo.mCocoaAUViewBundleLocation.takeRetainedValue();
var factoryClassName = cocoaViewInfo.mCocoaAUViewClass?.takeRetainedValue();
var bundle = NSBundle(URL: cocoaViewBundleURL);
var factoryClass = bundle?.classNamed(factoryClassName!);
var factory = factoryClass();It doesn't compile.
What is the proper way to do this with swift?
Two things you need to instantiate meta-type object:
- The type needs to be exlicitly declared as having initializer
- You need to use `init` notation
The return type of classNamed(_:) is AnyClass, which is just an alias of AnyObject.Type, and AnyObject is not declared as having initializer.
Try modifying two lines as follows:
let factoryClass = bundle?.classNamed(factoryClassName!) as! NSObject.Type
let factory = factoryClass.init()Thanks!
This works with the following code:
var bundle = NSBundle(URL: cocoaViewBundleURL);
var factoryClass = bundle?.classNamed(factoryClassName!) as NSObject.Type;
var factory :Void = factoryClass.initialize();I just wanted to update that this is the actual code that's working, not the previous:
var bundle = NSBundle(URL: cocoaViewBundleURL);
var factoryClass = bundle?.classNamed(factoryClassName!) as NSObject.Type?;
var factory :NSObject? = factoryClass?();