如何解决打断无限循环动画后，动画失效问题

问题现象
第一次触发无限循环动画后，快速连续多次点击打断该无限循环动画，再次点击就无法看到动画了。

背景知识
animateTo：指定由于闭包代码导致的状态变化插入过渡动效。接口参数有两个，分别是value和event，其中value指定AnimateParam对象（包括时长、Curve等）event为动画的闭包函数，闭包内变量改变产生的属性动画将遵循相同的动画参数。

问题定位
对动画的执行机制进行排查，确认在动画打断过程中是否存在多次叠加的情况，从而导致动画未能正常显示。

分析结论
动画并未真正消失，而是在每次打断过程中被持续叠加，由于叠加的动画实例过多，彼此之间相互覆盖或干扰，导致在视觉上表现不明显，从而给人以动画消失的错觉。

修改结论
首先，应设置一个duration为0的动画，用于确保在每次动画被中断时，能够清除前一次的动画实例，避免动画叠加；该动画的属性值需设置为一个与上一次动画最终状态不同的指定值，以确保状态的更新和正确清除。随后，再创建一个用于实现所需初始动画效果的动画实例，以确保动画表现符合预期。

if (this.isRecording) {
// 设置一个duration为0的动画停掉上一次动画
this.getUIContext().animateTo({ duration: 0, iterations: 1, playMode: PlayMode.Normal }, () => {
// 这里的opacityValue不可以和上一次设置的终止0.1相同
this.opacityValue = 0.2;
});
this.isRecording = false;
// 再创建需要的动画
this.getUIContext().animateTo({ duration: 0, iterations: 1, playMode: PlayMode.Normal }, () => {
this.opacityValue = 1;
});
} else {
this.isRecording = true;
this.getUIContext().animateTo({ duration: 1500, iterations: -1, }, () => {
this.opacityValue = 0.1;
});
}
完整示例参考如下：

@Entry
@Component
struct Page {
@State opacityValue: number = 1;
@State isRecording: boolean = false;

build() {
Row() {
Column() {
Text(this.isRecording ? 'Hello World' : 'Welcome')
.fontSize(50)
.fontWeight(FontWeight.Bold)
.opacity(this.opacityValue)
.textAlign(TextAlign.Center)
.fontColor('#000')
.onClick(() => {
if (this.isRecording) {
// 设置一个duration为0的动画停掉上一次动画
this.getUIContext().animateTo({ duration: 0, iterations: 1, playMode: PlayMode.Normal }, () => {
// 这里的opacityValue不可以和上一次设置的终止0.1相同
this.opacityValue = 0.2;
});
this.isRecording = false;
// 再创建需要的动画
this.getUIContext().animateTo({ duration: 0, iterations: 1, playMode: PlayMode.Normal }, () => {
this.opacityValue = 1;
});
} else {
this.isRecording = true;
this.getUIContext().animateTo({ duration: 1500, iterations: -1, }, () => {
this.opacityValue = 0.1;
});
}
});
}
.width('100%');
}
.height('100%');
}
}
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