private void Fly()
{
AudioDisplay(fly);
trail.StartTrail();
sp.enabled = false; //断开弹簧.
sibideUP = true;
Invoke("ToNextBird", 4f); //三秒后销毁已发射小鸟并准备下一只.
}
/// <summary>
/// 飞行
/// </summary>
private void Fly()
{
isMouseRelease = true;
isFly = true;
AudioPlay(fly);
birdTrail.StartTrail(); // 开启拖尾效果
sj.enabled = false; // 禁用弹簧关节，实现飞出的效果
Invoke("Next", 5f); // 1s 后，处理下一只小鸟
}