按钮背景最初是白色的，没有背景。需要背景改成如下十六进制值:#cd9037@IBOutletweakvarzeroTapped:WKInterfaceButton!@IBActionfuncZeroTapped(){zeroTapped.setBackgroundColor(UIColor(red:205,green:144,blue:55,alpha:1.0))vartime=dispatch_time(DISPATCH_TIME_NOW,TIMEOUT)dispatch_after(time,dispatch_get_main_queue(),{self.appendValue(0