提交初始版本，使用vant ui库

miniprogram_npm/@vant/weapp/nav-bar/index.js

@@ -0,0 +1,68 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var component_1 = require("../common/component");
+var utils_1 = require("../common/utils");
+(0, component_1.VantComponent)({
+    classes: ['title-class'],
+    props: {
+        title: String,
+        fixed: {
+            type: Boolean,
+            observer: 'setHeight',
+        },
+        placeholder: {
+            type: Boolean,
+            observer: 'setHeight',
+        },
+        leftText: String,
+        rightText: String,
+        customStyle: String,
+        leftArrow: Boolean,
+        border: {
+            type: Boolean,
+            value: true,
+        },
+        zIndex: {
+            type: Number,
+            value: 1,
+        },
+        safeAreaInsetTop: {
+            type: Boolean,
+            value: true,
+        },
+    },
+    data: {
+        height: 46,
+    },
+    created: function () {
+        var statusBarHeight = (0, utils_1.getSystemInfoSync)().statusBarHeight;
+        this.setData({
+            statusBarHeight: statusBarHeight,
+            height: 46 + statusBarHeight,
+        });
+    },
+    mounted: function () {
+        this.setHeight();
+    },
+    methods: {
+        onClickLeft: function () {
+            this.$emit('click-left');
+        },
+        onClickRight: function () {
+            this.$emit('click-right');
+        },
+        setHeight: function () {
+            var _this = this;
+            if (!this.data.fixed || !this.data.placeholder) {
+                return;
+            }
+            wx.nextTick(function () {
+                (0, utils_1.getRect)(_this, '.van-nav-bar').then(function (res) {
+                    if (res && 'height' in res) {
+                        _this.setData({ height: res.height });
+                    }
+                });
+            });
+        },
+    },
+});