Merge pull request #93 from xiaohuilam/patch-1

分享出去的小程序卡片点开，无pages栈，兼容代码回到首页

Colorui-UniApp/colorui/components/cu-custom.vue

@@ -52,6 +52,10 @@
 		},
 		methods: {
 			BackPage() {
+				if (getCurrentPages().length < 2 && 'undefined' !== typeof __wxConfig) {
+					let url = '/' + __wxConfig.pages[0]
+					return uni.redirectTo({url})
+				}
 				uni.navigateBack({
 					delta: 1
 				});