fix(@rbc/rbc-login): 登录页图片加载失败白屏

develop/@rbc/rbc-login/src/views/login/index.vue

@@ -252,23 +252,26 @@ export default {
         this.loginTitle = obj[0] && obj[0].title || this.loginTitle
         bgImgCode
           ? this.getImgUrl(bgImgCode).then((url) => {
-            this.loginImageBg = url
-            this.imgLoading -= 1
-          })
+              this.loginImageBg = url
+            }).finally(() => {
+              this.imgLoading -= 1
+            })
           : this.imgLoading -= 1
         iconCode
           ? this.getImgUrl(iconCode).then((url) => {
-            this.loginIcon = url
-            this.imgLoading -= 1
-          })
+              this.loginIcon = url
+            }).finally(() => {
+              this.imgLoading -= 1
+            })
           : this.imgLoading -= 1
         const boxImgCode = obj[1] && obj[1].icon
         this.titleColor = obj[1] && obj[1].ext1 || this.titleColor
         boxImgCode
           ? this.getImgUrl(boxImgCode).then((url) => {
-            this.boxImgUrl = url
-            this.imgLoading -= 1
-          })
+              this.boxImgUrl = url
+            }).finally(() => {
+              this.imgLoading -= 1
+            })
           : this.imgLoading -= 1
       }).catch(() => {
         this.imgLoading = 0