未签名按钮置灰

src/pages/UI7/UI7.tsx

@@ -101,6 +101,7 @@ const UI7: React.FC = () => {
   const [isDrawing, setIsDrawing] = useState(false);
   const [isSubmitting, setIsSubmitting] = useState(false);
   const [currentStep, setCurrentStep] = useState(0);
+  const [hasSignature, setHasSignature] = useState(false);
   const [currentPdfPageCount, setCurrentPdfPageCount] = useState(0);
 
   const totalRequiredSignatures = pdfInfoList.length + 1;
@@ -240,6 +241,10 @@ const UI7: React.FC = () => {
     setCurrentPdfPageCount(0);
   }, [currentStep, currentPdfFile]);
 
+  useEffect(() => {
+    setHasSignature(false);
+  }, [currentStep]);
+
   const resetCountdown = useCallback(() => {
     setCountdown(5);
     setShowWaitButton(true);
@@ -327,6 +332,7 @@ const UI7: React.FC = () => {
       ctx.quadraticCurveTo(lastPoint.x, lastPoint.y, midX, midY);
       ctx.stroke();
       lastPointRef.current = { x, y };
+      setHasSignature(true);
     },
     [getCoordinates, isDrawing]
   );
@@ -355,6 +361,7 @@ const UI7: React.FC = () => {
     ctx.lineWidth = 10;
     ctx.lineCap = "round";
     ctx.lineJoin = "round";
+    setHasSignature(false);
   }, []);
 
   const isCanvasBlank = useCallback(() => {
@@ -586,6 +593,7 @@ const UI7: React.FC = () => {
               <ConfirmButton
                 text={isSubmitting ? "提交中..." : "确定"}
                 onClick={handleConfirm}
+                disabled={!hasSignature || isSubmitting}
               />
             )}
           </div>