... SQLite 拓展 1.3版本更新（2025/09/24） 1.2版本更新（2025/09/15） 中文网测试案例 打开数据库 数据库信息 创建数据表 数据表信息 插入数据 更新数据 删...

... SQLite 拓展 1.2版本更新（2025/09/15） 中文网测试案例 打开数据库 数据库信息 创建数据表 数据表信息 插入数据 更新数据 删除数据 注册登录案例 ...

...pp Inventor 不包含复制文件的操作。幸运的是，由于 Taifun Bär（谢谢 Taifun！），有一个 App Inventor 扩展，它提供了一个带有 TaifunFile.copy 操作的组件 TaifunFile。可以从此处下载扩展。您应该在构建 Expeditions 和 Virtuality 演示之前安装...

...ng procedures step by step, while checking intermediate results, is a good idea when extracting data from complex XML structures, where there might be many steps and it’s hard to get a procedure correct on the first try. 切换 目录 ...

...ices a dip may map to one pixel while on others it may be nine pixels. The idea is that most screens will have the same number of “dips” to an inch of screen real estate. Developers can still give UI elements sizes in “pixels” in App Inventor, but realize those pixels are in fact dips. Ima...

...The angle between two lines is the angle rotated by the user. Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers. The a...

...The angle between two lines is the angle rotated by the user. Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers. The a...

...The angle between two lines is the angle rotated by the user. Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers. The a...

...The angle between two lines is the angle rotated by the user. Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers. The a...

...The angle between two lines is the angle rotated by the user. Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers. The a...