微信小程序中使用WEBVIEW组件，如果需要显示全屏内容，需要在小程序的wxml文件中添加`
1. 在项目的`app.json`文件中，添加`"web-view": true`配置项：
```json
{
"pages": [
"pages/index/index",
"pages/detail/detail"
],
"window": {
"backgroundTextStyle": "light",
"navigationBarBackgroundColor": "#fff",
"navigationBarTitleText": "微信小程序",
"navigationBarTextStyle": "black"
},
"tabBar": {
"list": [
{
"pagePath": "pages/index/index",
"text": "首页",
"iconPath": "images/home.png",
"selectedIconPath": "images/home-active.png"
},
{
"pagePath": "pages/detail/detail",
"text": "详情页",
"iconPath": "images/detail.png",
"selectedIconPath": "images/detail-active.png"
}
]
},
"web-view": {
"style": "fullscreen",
"backgroundColor": "#fff",
"backgroundAttachment": "scroll",
"backgroundPosition": "center",
"backgroundRepeat": "no-repeat",
"backgroundSize": "cover",
"width": "100%",
"height": "100%",
"frame": "fullscreen",
"skin": "light",
"lazy-load": false,
"show-navigator-when-loading": true,
"onload": (res) => {
if (res.customRequestData.isFullscreen) {
this.setData({
isFullscreen: res.customRequestData.isFullscreen
});
} else {
this.setData({
isFullscreen: false
});
}
}
}
}
```
2. 在`app.js`文件中，初始化页面时设置`isFullscreen`属性为`false`，以便在页面加载时不显示全屏效果：
```javascript
App({
onLaunch: function () {
// ...
this.setData({
isFullscreen: false
});
},
// ...
});
```
3. 在需要显示全屏内容的页面中，监听`isFullscreen`属性的变化，根据其值来显示或隐藏全屏内容：
```html
```
这样，当页面加载时，`isFullscreen`属性被设置为`false`，页面不会显示全屏效果。当用户点击页面中的按钮或其他元素时，`onShow`、`onHide`和`onUnload`方法会被调用，根据它们的返回值更新`isFullscreen`属性的值，从而控制页面是否显示全屏效果。
