What is the best way to make a UIButton checkbox?

Question

I am trying to make a standard check box for my iPhone app from a UIButton with a title and image. The button image changes between an \"unchecked\" image and

Answer 1

    UIImage* nonCheckedImage=[UIImage imageNamed:@"ic_check_box_outline_blank_grey600_48dp.png"];//[UIImage init
    UIImage* CheckedImage=[UIImage imageNamed:@"ic_check_box_black_48dp.png"];//[UIImage init

    //ic_check_box_black_48dp.png
    [_checkBox setImage:CheckedImage forState:UIControlStateSelected];
    [_checkBox setImage:nonCheckedImage forState:UIControlStateNormal];
}

- (IBAction)checkBoxToggle:(id)sender {
    _checkBox.selected = !_checkBox.selected; // toggle the selected property, just a simple BOOL

}

the image you can use google icon