Add titleColor Binder for UIButton

[cozzin]

I wanted to apply RxTheme to the UIButton's text, but there was no titleColor Binder. Currently, when we try to change the color of the button's titleLabel, we need to write code like this:

themeService.relay
    .map{ $0 }
    .subscribe { [weak self] theme in
        let textColor = theme.element?.associatedObject.textColor
        self?.button.setTitleColor(textColor, for: .normal)

        let tintColor = theme.element?.associatedObject.tintColor
        self?.button.setTitleColor(tintColor, for: .highlighted)
    }.disposed(by: disposeBag)

So I added titleColor(for state: UIControlState) Binder. This binder makes it easier to write code.

themeService.rx
    .bind({ $0.textColor }, to: button.rx.titleColor(for: .normal))
    .bind({ $0.tintColor }, to: button.rx.titleColor(for: .highlighted))
    .disposed(by: disposeBag)

[rxswiftcommunity[bot]]

Thanks a lot for contributing @cozzin! I've invited you to join the RxSwiftCommunity GitHub organization – no pressure to accept! If you'd like more information on what this means, check out our contributor guidelines and feel free to reach out with any questions.

Generated by :no_entry_sign: dangerJS

[wddwycc]

@cozzin Next time you want to use a binder which RxTheme not supporting yet, You can declare it in your codebase in the first place

[cozzin]

@wddwycc Thank you for your explain ☺️