Method removeChildAt

packages/fairygui/src/core/GComponent.ts:125–153

* Remove child at index * 移除指定位置的子对象

(index: number, bDispose: boolean = false)

     * 移除指定位置的子对象
     */
    public removeChildAt(index: number, bDispose: boolean = false): GObject {
        if (index < 0 || index >= this._children.length) {
            throw new Error('Invalid child index: ' + index);
        }

        const child = this._children[index];
        child._parent = null;

        if (child.sortingOrder !== 0) {
            this._sortingChildCount--;
        }

        this._children.splice(index, 1);

        if (child.internalVisible) {
            const childDisplay = child.displayObject;
            if (this._displayObject && childDisplay) {
                this._displayObject.removeChild(childDisplay);
            }
        }

        this.setBoundsChangedFlag();

        if (bDispose) {
            child.dispose();
        }

        return child;
    }

    /**
     * Remove children in range