cancel-animation-frame: 调整文案

pages/API/cancel-animation-frame/cancel-animation-frame.uvue

@@ -5,7 +5,7 @@
     <button @click="stopRequestAnimationFrame">cancelAnimationFrame</button>
     <text class="frame-count">FPS: {{fps}}</text>
     <text class="frame-count">FrameCount: {{testFrameCount}}</text>
-    <text class="tips">提示: 在当前测试例子中，调用一次 requestAnimationFrame 帧率翻倍，cancelAnimationFrame 后恢复</text>
+    <text class="tips">提示: 在当前测试例子中，每增加一次调用 requestAnimationFrame 帧率翻倍，cancelAnimationFrame 后恢复</text>
   </view>
 </template>
 
@@ -29,13 +29,14 @@
     methods: {
       startRequestAnimationFrame() {
         this.taskId = requestAnimationFrame((timestamp : number) => {
-          this.testFrameCount++
           this.frameCount++
           if (timestamp - this.lastTime >= 1000) {
             this.fps = this.frameCount
             this.frameCount = 0
             this.lastTime = timestamp
           }
+
+          this.testFrameCount++
           this.startRequestAnimationFrame()
         })
       },