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npm安装报错：rollbackFailedOptional verb npm-session - 更多技术 - 清泛...
...onal: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist 使用npm install安装组件时报错：
rollbackFailedOptional: verb npm-session xxxx
原因：组件目标地址无法访问导致，切换npm...
npm安装报错：rollbackFailedOptional verb npm-session - 更多技术 - 清泛...
...onal: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist 使用npm install安装组件时报错：
rollbackFailedOptional: verb npm-session xxxx
原因：组件目标地址无法访问导致，切换npm...
npm安装报错：rollbackFailedOptional verb npm-session - 更多技术 - 清泛...
...onal: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist 使用npm install安装组件时报错：
rollbackFailedOptional: verb npm-session xxxx
原因：组件目标地址无法访问导致，切换npm...
APP INVENTOR硬件交互学习教程10——多个虚拟界面实现 - 创客硬件开发 - 清...
... 2024-07-10 11:47 编辑
通过配置垂直布局实现两个虚拟界面切换。
1.界面设计
增加了两个垂直布局，作为界面1和界面2的容器存放每个页面的内容；增加导航布局，水平布局增加两个按钮，用于切面切换。
2.逻辑设计
定义...
如何更改启动屏幕 - App应用开发 - 清泛IT社区，为创新赋能！
建立了1个默认的screen1,后来想起要做一个登录屏幕login，但这个新建的login是在screen1后面，如何调换它们的位置，让APP启动时，先从login启动？无法指定启动的屏幕，默认就是特定的Screen1。两种思路：
1、使用“复制屏幕”功能...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...omponent is an item that the app can use. It could be visible on the phone screen such as a button or label, or it could be non-visible, such as a camera or a sensor. Each component has a set of blocks that the programmer can use to control its behavior.
Figure 1. Blocks for an App Inventor app t...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...omponent is an item that the app can use. It could be visible on the phone screen such as a button or label, or it could be non-visible, such as a camera or a sensor. Each component has a set of blocks that the programmer can use to control its behavior.
Figure 1. Blocks for an App Inventor app t...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...omponent is an item that the app can use. It could be visible on the phone screen such as a button or label, or it could be non-visible, such as a camera or a sensor. Each component has a set of blocks that the programmer can use to control its behavior.
Figure 1. Blocks for an App Inventor app t...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...omponent is an item that the app can use. It could be visible on the phone screen such as a button or label, or it could be non-visible, such as a camera or a sensor. Each component has a set of blocks that the programmer can use to control its behavior.
Figure 1. Blocks for an App Inventor app t...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...omponent is an item that the app can use. It could be visible on the phone screen such as a button or label, or it could be non-visible, such as a camera or a sensor. Each component has a set of blocks that the programmer can use to control its behavior.
Figure 1. Blocks for an App Inventor app t...