()
| 87 | } |
| 88 | |
| 89 | public play():void { |
| 90 | if (this._isRunning) { |
| 91 | return; |
| 92 | } |
| 93 | if (this._dur === 0 || this._ttl <= 0) { |
| 94 | return; |
| 95 | } |
| 96 | this._isRunning = true; |
| 97 | this._timeKeeper.reset(); |
| 98 | if (this._tween) { |
| 99 | this._tween.play(); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | public stop():void { |
| 104 | if (!this._isRunning) { |