Struct makepad_objc_sys::declare::ClassDecl

pub struct ClassDecl { /* private fields */ }

A type for declaring a new class and adding new methods and ivars to it before registering it.

Implementations

impl ClassDecl

pub fn new(name: &str, superclass: &Class) -> Option<ClassDecl>

Constructs a ClassDecl with the given name and superclass. Returns None if the class couldn’t be allocated.

pub fn root(
    name: &str,
    intitialize_fn: extern "C" fn(_: &Class, _: Sel)
) -> Option<ClassDecl>

Constructs a ClassDecl declaring a new root class with the given name. Returns None if the class couldn’t be allocated.

An implementation for +initialize must also be given; the runtime calls this method for all classes, so it must be defined on root classes.

Note that implementing a root class is not a simple endeavor. For example, your class probably cannot be passed to Cocoa code unless the entire NSObject protocol is implemented. Functionality it expects, like implementations of -retain and -release used by ARC, will not be present otherwise.

pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)where
    F: MethodImplementation<Callee = Object>,

Adds a method with the given name and implementation to self. Panics if the method wasn’t sucessfully added or if the selector and function take different numbers of arguments. Unsafe because the caller must ensure that the types match those that are expected when the method is invoked from Objective-C.

pub unsafe fn add_class_method<F>(&mut self, sel: Sel, func: F)where
    F: MethodImplementation<Callee = Class>,

Adds a class method with the given name and implementation to self. Panics if the method wasn’t sucessfully added or if the selector and function take different numbers of arguments. Unsafe because the caller must ensure that the types match those that are expected when the method is invoked from Objective-C.

pub fn add_ivar<T>(&mut self, name: &str)where
    T: Encode,

Adds an ivar with type T and the provided name to self. Panics if the ivar wasn’t successfully added.

pub fn add_protocol(&mut self, proto: &Protocol)

Adds a protocol to self. Panics if the protocol wasn’t successfully added

pub fn register(self) -> &'static Class

Registers self, consuming it and returning a reference to the newly registered Class.

Trait Implementations

impl Drop for ClassDecl

fn drop(&mut self)

Executes the destructor for this type.