Cocos Creator 拖动效果

我们要实现的效果是，按住并拖动一个小物体，物体跟随手指（鼠标）移动。

代码DragToAnywhere.ts

const { ccclass, property } = cc._decorator;

@ccclass
export default class DragToAnywhere extends cc.Component {

    @property(cc.Label)
    label: cc.Label = null;

    start () {
        
    }

    onEnable() {
        this.node.on(cc.Node.EventType.TOUCH_MOVE, this._onTouchMove, this);
        this.node.on(cc.Node.EventType.TOUCH_END, this._onTouchEnd, this);
    }

    onDisable() {
        this.node.off(cc.Node.EventType.TOUCH_MOVE, this._onTouchMove, this);
        this.node.off(cc.Node.EventType.TOUCH_END, this._onTouchEnd, this);
    }

    // update (dt) {}

    _onTouchMove(touchEvent) {
        let location = touchEvent.getLocation();
        this.node.position = this.node.parent.convertToNodeSpaceAR(location); // 确定位置
    }

    _onTouchEnd(touchEvent) {
        // 放下
    }
}

把DragToAnywhere.ts挂在预制体上。在场景中创建预制体对象。

let node1 = cc.instantiate(this.drag_item);
this.node.addChild(node1);
node1.x = 100;
node1.y = 100;
node1.getComponent(DragToAnywhere).label.string = '水星';

工程请查看github/CCCTry

参考：
Cocos Creator: https://rustfisher.com/categories/CocosCreator/