Method addRelation

packages/fairygui/src/core/GObject.ts:664–666

* Add a relation to another object * 添加与另一对象的关联

(target: GObject, relationType: ERelationType, bUsePercent: boolean = false)

     * 添加与另一对象的关联
     */
    public addRelation(target: GObject, relationType: ERelationType, bUsePercent: boolean = false): void {
        this._relations?.add(target, relationType, bUsePercent);
    }

    /**
     * Remove a relation