// everything is under namespace objc
NSObject = objc.NSObject
UIView = objc.UIView

var o;
// to create an object
// in ObjC way
o = NSObject.alloc().init();  // o = [[NSObject alloc] init];

// in js way
o = new NSObject;   // o = [NSObject alloc];
// but remember to call init or other constructor
o.init();           // [o init];

// call a method
var desc = o.description() // desc = [o description];
log(desc) // NSLog(@"%@", desc); -- <NSObject: 0x75789e0>
// NSString is also automatically converted into js string
typeof s; // string
// NSArray and NSNumber are also automatically converted
var list = objc.NSArray.arrayWithArray([1,2,3])
log(list);  // 1,2,3

var view = UIView.alloc().init();
// no property available yet, use setter and getter
view.setBackgroundColor(objc.UIColor.redColor()); // [view setBackgroundColor:[UIColor redColor]];
log(view.backgroundColor());  // NSLog(@"%@", [view backgroundColor]); -- UIDeviceRGBColorSpace 1 0 0 1


// to subclass an ObjC class
Parent = NSObject.extend('Parent', null, {
    init: function() {  // this method override `init` from NSObject
        this._super();  // [super init]; -- call `init` from NSObject
        log('parent');
    }, 
    test: function() {  // this is a normal js function because it does not override any existing objc method
        log('parent test');
    },
    t: 1
});

// subclass from ObjC class that created in JS
Child = Parent.extend('Child', null, {
    init: function() {
        this._super();
        log('Child');
    },
    test: function() {
        log('child test');
        this._super();    //Parent.prototype.test.apply(this, arguments);
    },
});