[Bug Report] SWiper背景图片加载问题

### VUX version
2.9.2

### OS/Browsers version
谷歌

### Vue version
2.5.17

### Code

```html

mounted(){
this.$get(this.$api.HOME.SOWING_MAP)
.then((response) =>{
this. roundPlay = response.slideshow.data.map((one, index) => ({
url: 'javascript:',
img: one.img_src
}))
})
this.billBoard();
this.getList();
this.getCurrentCity();
// console.log(this.$api.COMMON.GET_DICT)
},
```

### Steps to reproduce
接口打印出来的背景图是个远程地址没有中文但是在浏览器中发现有乱码 如：style="background-image: url("http://www.xxh-xcc.comuploads­minslides_thumb�07�ce2349bbabbe0dfddcba907988.gif");正常地址为：img_src: "http://www.xxh-xcc.com\uploads\admin\slides_thumb\20180807\95b348df4f5a656314d267533065cbda.gif"

### What is Expected?
img_src: "http://www.xxh-xcc.com\uploads\admin\slides_thumb\20180807\95b348df4f5a656314d267533065cbda.gif"

### What is actually happening?
url("http://www.xxh-xcc.comuploads­minslides_thumb�07�ce2349bbabbe0dfddcba907988.gif