增加onLoopComplete和onComplete回调

src/support/Tween.ts

@@ -53,6 +53,14 @@ export interface TweenOptions {
 	 * 支持对象展开的字段名列表
 	 */
 	fields?: string[];
+	/**
+	 * 一次循环完成回调
+	 */
+	onLoopComplete?: Function;
+	/**
+	 * 完成回调
+	 */
+	onComplete?: Function;
 }
 
 /**
@@ -122,6 +130,8 @@ export class Tween extends HashObject {
 	protected toProps: any;
 	protected ease: Function;
 	protected duration: number;
+	protected onLoopComplete: Function;
+	protected onComplete: Function;
 
 	constructor(host: any, target: any, options?: TweenOptions, plugins = []) {
 		super();
@@ -131,6 +141,8 @@ export class Tween extends HashObject {
 		this.loop = options ? options.loop : 0;
 		this.autoPlay = options ? (options.hasOwnProperty('autoPlay') ? options.autoPlay : true) : true;
 		this.fields = options ? options.fields : null;
+		this.onLoopComplete = options.onLoopComplete;
+		this.onComplete = options.onComplete;
 
 		this.plugins = plugins;
 
@@ -388,13 +400,19 @@ export class Tween extends HashObject {
 					break;
 			}
 		} else {
-			if (this.loop < 0) {
-				this._doStart();
-			} else if (this.loopCounting < this.loop) {
-				this._doStart();
-			} else {
-				this.status = STATUS.IDLE;
-			}
+			this._onEnd();
+		}
+	};
+
+	protected _onEnd(){
+		this.onLoopComplete && this.onLoopComplete();
+		if (this.loop < 0) {
+			this._doStart();
+		} else if (this.loopCounting < this.loop) {
+			this._doStart();
+		} else {
+			this.status = STATUS.IDLE;
+			this.onComplete && this.onComplete();
 		}
 	}
 }
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