编写没有故事板的iOS 8共享扩展

Question

Does anyone know of a good way to write an iOS 8 share extension without the MainInterface.storyboard that comes with the template?

When I delete the file or remove the NSExtensionMainStoryboard from Info.plist , the extension stops working (nothing happens when you tap on the button in the share pane). We tried replacing NSExtensionMainStoryboard with NSExtensionPrincipalClass which also didn't work.

Any ideas?

Answer 1

Figured it out!

Turns out there's a weird module naming thing going on in Swift, so you can fix it by adding an @objc name to the class:

@objc(PrincipalClassName)

class PrincipalClassName: UIViewController {
...

and then set the NSExtensionPrincipalClass key to PrincipalClassName .

Answer 2

Found the answers from these answers combined Answer 1 and Answer 2 .

For Objective-C you will have to put the following in the info.plist of the App extension: NSExtensionPrincipalClass and make sure that it is under NSExtension Dict

So full answer should be like this , in my case ActionViewController is the App extension viewController

Answer 3

无法添加注释但它不再是NSPrincipalClass而是NSExtensionPrincipalClass

Answer 4

Instead of the @objc hack, the proper way to do it in Swift is to include the module name in NSExtensionPrincipalClass , ie,

<key>NSExtensionPrincipalClass</key>
<string>$(PRODUCT_MODULE_NAME).ActionViewController</string>

(Documenting the error otherwise:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSDictionaryM setObject:forKey:]: object cannot be nil (key: ...)'

Hopefully will help someone who run into this error in the future.)