loadDragonBones 方法参考上一篇加载龙骨的文章 【美年达的开发日记】龙骨操作 - 从bundle加载龙骨
如果龙骨插槽上绑定的是另一个龙骨文件，那么以下可以替换龙骨插槽上的龙骨文件，实现对插槽的换装
async function replaceSkin(bundleName,armatureDisplay,slotName){
let asset = await loadDragonBones(bundleName);
let armature = armatureDisplay.armature();
var slot = armature.getSlot(slotName);
let node = new cc.Node();
node.addComponent(dragonBones.ArmatureDisplay);
let bones = node.getComponent(dragonBones.ArmatureDisplay);
bones.dragonAsset = asset.dragonAsset;
bones.dragonAtlasAsset = asset.dragonAtlasAsset;
bones.armatureName=bundleName;
let factory = dragonBones.CCFactory.getInstance();
let weapon = factory.buildArmature(bundleName);
slot.childArmature = weapon;
}