rubicon-objc

from rubicon.objc import ObjCClass, NSObject import asyncio # Access an Objective-C class (e.g., NSURL from Foundation framework) NSURL = ObjCClass("NSURL") # Create an instance using a static constructor method. # Objective-C methods with ':' are mapped to Python keyword arguments or replaced with '_' in method name. # E.g., Objective-C's +URLWithString: becomes .URLWithString_() or .URLWithString(url_string). base_url = NSURL.URLWithString_("https://beeware.org/") print(f"Base URL: {base_url}") # Call another method with multiple arguments using keyword arguments full_url = NSURL.URLWithString_relativeToURL_("contributing/", relativeToURL=base_url) print(f"Full URL: {full_url}") # Access Objective-C properties using Python attribute syntax print(f"Full URL scheme: {full_url.scheme}") # --- Defining a new Objective-C class in Python --- # In interactive environments (like Pythonista) or when re-running code, # Objective-C class redefinition can cause errors. auto_rename avoids this. ObjCClass.auto_rename = True # Set globally or pass auto_rename=True to ObjCClass() constructor class MyPythonDelegate(NSObject): # Initialize the Objective-C object. Must call super().init() def init(self): self = super().init() if self: print("MyPythonDelegate initialized!") return self # Define an Objective-C method (e.g., a delegate callback) # Argument types should generally be annotated for clarity and correctness. def myDelegateMethod_withValue_(self, sender: 'id', value: int): print(f"Delegate method called by {sender} with value: {value}") return None # Objective-C methods often return `void` or `id` (None for Python) # Instantiate the Python-defined Objective-C class delegate_instance = MyPythonDelegate.alloc().init() # Example of calling its method (simulating an Objective-C call) delegate_instance.myDelegateMethod_withValue_(NSObject.alloc().init(), 42)