example.rs - mozsearch

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#[macro_use]

extern crate objc;

use objc::Encode;

use objc::rc::StrongPtr;

use objc::runtime::{Class, Object};

fn main() {

    // Get a class

    let cls = class!(NSObject);

    println!("NSObject size: {}", cls.instance_size());

    // Inspect its ivars

    println!("NSObject ivars:");

    for ivar in cls.instance_variables().iter() {

        println!("{}", ivar.name());

    // Allocate an instance

    let obj = unsafe {

        let obj: *mut Object = msg_send![cls, alloc];

        let obj: *mut Object = msg_send![obj, init];

        StrongPtr::new(obj)

};

    println!("NSObject address: {:p}", obj);

    // Access an ivar of the object

    let isa: *const Class = unsafe {

        *(**obj).get_ivar("isa")

};

    println!("NSObject isa: {:?}", isa);

    // Inspect a method of the class

    let hash_sel = sel!(hash);

    let hash_method = cls.instance_method(hash_sel).unwrap();

    let hash_return = hash_method.return_type();

    println!("-[NSObject hash] return type: {:?}", hash_return);

    assert!(hash_return == usize::encode());

    // Invoke a method on the object

    let hash: usize = unsafe {

        msg_send![*obj, hash]

};

    println!("NSObject hash: {}", hash);