example/
example.rs

1#[macro_use]
2extern crate objc;
3
4use objc::Encode;
5use objc::rc::StrongPtr;
6use objc::runtime::{Class, Object};
7
8fn main() {
9    // Get a class
10    let cls = class!(NSObject);
11    println!("NSObject size: {}", cls.instance_size());
12
13    // Inspect its ivars
14    println!("NSObject ivars:");
15    for ivar in cls.instance_variables().iter() {
16        println!("{}", ivar.name());
17    }
18
19    // Allocate an instance
20    let obj = unsafe {
21        let obj: *mut Object = msg_send![cls, alloc];
22        let obj: *mut Object = msg_send![obj, init];
23        StrongPtr::new(obj)
24    };
25    println!("NSObject address: {:p}", obj);
26
27    // Access an ivar of the object
28    let isa: *const Class = unsafe {
29        *(**obj).get_ivar("isa")
30    };
31    println!("NSObject isa: {:?}", isa);
32
33    // Inspect a method of the class
34    let hash_sel = sel!(hash);
35    let hash_method = cls.instance_method(hash_sel).unwrap();
36    let hash_return = hash_method.return_type();
37    println!("-[NSObject hash] return type: {:?}", hash_return);
38    assert!(hash_return == usize::encode());
39
40    // Invoke a method on the object
41    let hash: usize = unsafe {
42        msg_send![*obj, hash]
43    };
44    println!("NSObject hash: {}", hash);
45}
example/example.rs

example/
example.rs
