Dreaming of promise base event handling v2

gistfile1.m

- (id)init 
{
    if (self = [super initNibName:nil bundle:nil]) {
		[[self whenViewDidLoad] then:^(id result, NSError *error) {
 
 			[[self.loginButton whenTouchDown] then:^(id result, NSError *error) {

				[[client login:self.loginField.text password:self.passwordField.text] then:^(id result, NSError *error) {

						[client saveAccessToken:[result token]];
						[self presentModalViewController:[[RegisterViewController alloc] init]];

					} fail:^(id result, NSError *error) {

						[UIAlertView presentError:error];
				}];

 			}];

		}];
	}
	return self;
}