-?(void)viewDidLoad?{
????[super?viewDidLoad];
????self.redField.text?=?self.greenField.text?=?self.blueField.text?=?@"0.5";
????RACSignal?*redSignal?=?[self?bindSlider:self.redSlider?textField:self.redField];
????RACSignal?*greenSignal?=?[self?bindSlider:self.greenSlider?textField:self.greenField];
????RACSignal?*blueSignal?=?[self?bindSlider:self.blueSilder?textField:self.blueField];
//????RACSignal?*resultSignal?=?[[RACSignal?combineLatest:@[redSignal,?greenSignal,?blueSignal]]?map:^id?_Nullable(RACTuple?*?_Nullable?value)?{
//????????return?[UIColor?colorWithRed:[value[0]?floatValue]?green:[value[1]?floatValue]?blue:[value[2]?floatValue]?alpha:1];
//????}];
//????
//????RAC(self.RGBView,?backgroundColor)?=?resultSignal;
????
}

-(RACSignal?*)bindSlider:(UISlider?*)slider?textField:(UITextField?*)textField?{
????RACChannelTerminal?*sliderChannel?=?[slider?rac_newValueChannelWithNilValue:nil];
????RACChannelTerminal?*fieldChannel?=?[textField?rac_newTextChannel];
????[sliderChannel?subscribe:fieldChannel];
????[sliderChannel?map:^id?_Nullable(id??_Nullable?value)?{
????????return?[NSString?stringWithFormat:@"%.02f",?[value?floatValue]];
????}];
????return?[sliderChannel?merge:fieldChannel];
????
}

希望老師給看看謝謝！