JXA/ASObjC script to briefly summarize methods and properties of an Objective-C class using objc runtime methods (e.g. class_copyMethodList, method_getTypeEncoding, etc.). The script reports method names, the number of arguments they accept, the argument types, property names, property types, and property attributes such as read-only and nonatomic.

SummarizeObjCMethod.scpt

(() => {
	ObjC.import('objc');
	ObjC.import('AppKit')
	
	// Get methods of ObjC class, store # of methods and properties in reference objects
	const targetClass = $.NSImage;
	const num_methods = Ref();
	const num_properties = Ref();
	const methods = $.class_copyMethodList(targetClass, num_methods);
	const properties = $.class_copyPropertyList(targetClass, num_properties)
	
	// Log name and argument info of each method 
	console.log(num_methods[0], "Methods:");
	for (let i=0; i<num_methods[0]; i++) {
		const method = methods[i];
		console.log("\t", $.method_getName(method));
		console.log("\t\tType Encoding:", $.method_getTypeEncoding(method));
		console.log("\t\tArg Count:", $.method_getNumberOfArguments(method));
	}
	
	// ObjC property type encodings
	const typeEncodings = {
		"Tc": "char",
		"Ti": "int",
		"Ts": "short",
		"Tl": "long",
		"Tq": "long long",
		"TC": "unsigned char",
		"TI": "unsigned int",
		"TS": "unsigned short",
		"TL": "unsigned long",
		"TQ": "unsigned long long",
		"Tf": "float",
		"Td": "double",
		"TB": "bool",
		"Tv": "void",
		"T*": "char string",
		"T@": "object",
		"T#": "Class",
		"T:": "Selector",
		"T[": "array",
		"T{": "structure",
		"T(": "union",
		"Tb": "bit field",
		"T^": "pointer",
		"T?": "unknown"
	};
	
	// Log name and attribute info of each property
	console.log("\n");
	console.log(num_properties[0], "Properties:");
	for (let i=0; i<num_properties[0]; i++) {
		const method = properties[i];
		console.log("\t", $.property_getName(method));
		
		const attributeString = $.property_getAttributes(method)
		let attributeSummary = "";
		
		// Format the type nicely
		const typeEncoding = attributeString.split(/(,| )/g)[0]
		attributeSummary += typeEncodings[typeEncoding.slice(0,2)]
		if (typeEncoding.length > 2) {
			const data = typeEncoding.slice(2).replaceAll(/("|\)|]|{|}|<|>|=.*)/g, "")
			attributeSummary += ` (${data})`
		}
		
		// Add attribute descriptions
		if (attributeString.includes(",R")) attributeSummary += ", readonly"
		if (attributeString.includes(",C")) attributeSummary += ", copy"
		if (attributeString.includes(",&")) attributeSummary += ", retain"
		if (attributeString.includes(",N")) attributeSummary += ", nonatomic"
		if (attributeString.includes(",G")) attributeSummary += ", getter"
		if (attributeString.includes(",S")) attributeSummary += ", setter"
		if (attributeString.includes(",D")) attributeSummary += ", dynamic"
		if (attributeString.includes(",W")) attributeSummary += ", weak"
		if (attributeString.includes(",P")) attributeSummary += ", eligible for garbage collection"
		
		console.log("\t\t", attributeSummary);
	}
})()


/* Output for NSImage: */
/* 256 Methods: */
/* 	 tintedImageWithColor:operation: */
/* 		Type Encoding: @32@0:8@16Q24 */
/* 		Arg Count: 4 */
/* 	 resizeTo: */
/* 		Type Encoding: @24@0:8d16 */
/* 		Arg Count: 3 */
/* 	 ...
/*	 ...
*/
/* 42 Properties: */
/* 	 ik_fullResolutionFileURL */
/* 		 object (NSURL), retain, nonatomic */
/* 	 ikProfilePictureAttributedImageName */
/* 		 object (NSString), copy, nonatomic */
/* 	 CGImage */
/* 		 pointer (CGImage), readonly, nonatomic */
/* 	 vk_imageView */
/* 		 object (NSImageView), readonly, nonatomic */
/* 	 willProvideAdaptedImageForPresentation */
/* 		 bool, readonly */
/*	 ...
/*	 ...
*/