#鸿蒙通关秘籍#如何优化动画代码以减少鸿蒙系统中的帧率丢失问题？

优化鸿蒙系统中的动画代码以避免丢帧，可以使用系统提供的动画接口而不是自定义动画。鸿蒙提供的函数不但减少UI线程负载，还可以简化动画实现。以下是两种有效的优化策略：

1. 使用属性动效API：

   @Entry
   @Component
   struct AttrAnimationExample1 {
     @State widthSize: number = 200
     @State heightSize: number = 100
     @State flag: boolean = true
   
     build() {
       Column() {
         Button('click me')
           .onClick((event?: ClickEvent | undefined) => {
             if (this.flag) {
               this.widthSize = 100
               this.heightSize = 50
             } else {
               this.widthSize = 200
               this.heightSize = 100
             }
             this.flag = !this.flag
           })
           .width(this.widthSize).height(this.heightSize).backgroundColor(0x317aff)
           .animation({
             duration: 2000,
             curve: Curve.Linear,
             delay: 500,
             iterations: 1,
             playMode: PlayMode.Normal,
           })
       }.width('100%').margin({ top: 5 })
     }
   }
   

2. 使用显式动效API：

   @Entry
   @Component
   struct AnimateToExample2 {
     @State widthSize: number = 200;
     @State heightSize: number = 100;
     @State flag: boolean = true;
   
     build() {
       Column() {
         Button('click me')
           .onClick((event?: ClickEvent | undefined) => {
             if (this.flag) {
               animateTo({
                 duration: 2000,
                 curve: Curve.Linear,
                 delay: 500,
                 iterations: 1,
                 playMode: PlayMode.Normal,
               }, () => {
                 this.widthSize = 100;
                 this.heightSize = 50;
               })
             } else {
               animateTo({
                 duration: 2000,
                 curve: Curve.Linear,
                 delay: 500,
                 iterations: 1,
                 playMode: PlayMode.Normal,
               }, () => {
                 this.widthSize = 200;
                 this.heightSize = 100;
               })
             }
             this.flag = !this.flag;
           })
           .width(this.widthSize).height(this.heightSize).backgroundColor(0x317aff)
       }.width('100%').margin({ top: 5 })
     }
   }
   

通过以上方法，可以大幅提高动画的流畅度，同时减少丢帧现象的发生。