diff --git a/pages/component/canvas/canvas/ball.uvue b/pages/component/canvas/canvas/ball.uvue
index b60a53b398c230d0ed45f6922344ed09619fb48b..df16a2e5655a37ab4bc5b82d0bdde8855fee2639 100644
--- a/pages/component/canvas/canvas/ball.uvue
+++ b/pages/component/canvas/canvas/ball.uvue
@@ -39,7 +39,7 @@
         this.vy = Math.abs(this.vy)
         return
       }
-      if (this.y > this.width - this.radius) {
+      if (this.y > this.height - this.radius) {
         this.vy = -Math.abs(this.vy)
       }
     }
@@ -96,20 +96,20 @@
       if (!this.runningFlag) {
         return
       }
-      this._animateResult = requestAnimationFrame((_: number) => {
+      this._animateResult = uni.requestAnimationFrame((_: number) => {
         this.animate()
       })
     }
 
     start() {
-      cancelAnimationFrame(this._animateResult)
+      uni.cancelAnimationFrame(this._animateResult)
       this.runningFlag = true
       this.animate()
     }
 
     stop() {
       this.runningFlag = false
-      cancelAnimationFrame(this._animateResult)
+      uni.cancelAnimationFrame(this._animateResult)
     }
   }