vant2在uniApp中使用uploader组件报错：Invalid handler for event "load": got undefined

• 原因：其中vantImage组件中onLoad方法与uniApp冲突，导致项目卡顿无法运行
• 临时解决方法：修改vant源码

源码路径: node_modules/vant/es/image/index.js

将以下方法中的 onLoad -> onImageLoad, onError -> onImageError

methods: {
	onImageLoad: function onLoad(event) {
	  this.loading = false;
	  this.$emit('load', event);
	},
	onLazyLoaded: function onLazyLoaded(_ref) {
	  var el = _ref.el;
	
	  if (el === this.$refs.image && this.loading) {
	    this.onImageLoad();
	  }
	},
	genImage: function genImage() {
		var h = this.$createElement;
		var imgData = {
			class: bem('img'),
			attrs: {
				alt: this.alt
			},
			style: {
				objectFit: this.fit
			}
		};

		if (this.error) {
			return;
		}

		if (this.lazyLoad) {
			return h("img", _mergeJSXProps([{
				"ref": "image",
				"directives": [{
					name: "lazy",
					value: this.src
				}]
			}, imgData]));
		}

		return h("img", _mergeJSXProps2([{
			"attrs": {
				"src": this.src
			},
			"on": {
				"load": this.onImageLoad,
				"error": this.onImageError
			}
		}, imgData]));
	},
	onLazyLoadError: function onLazyLoadError(_ref2) {
		var el = _ref2.el;

		if (el === this.$refs.image && !this.error) {
			this.onImageError();
		}
	},
	onImageError: function onError(event) {
		this.error = true;
		this.loading = false;
		this.$emit('error', event);
	}
}