大约有 41 项符合查询结果（耗时：0.0128秒） [XML]
用户界面（UI）组件 · App Inventor 2 中文网
...P 中表示法，例如 (1 a true)。
注意： 该属性仅出现在 Screen1 中，Screen1 的值决定了应用程序中所有屏幕的行为。
显示状态栏
状态栏是屏幕最上面的栏，该属性设置状态栏是否是可见的。
屏幕大小
如果设置为响应式...
App Inventor 2 字典代码块 · App Inventor 2 中文网
...
结果是：{“key1”:”val1”,”key2”:”val2”}
前提是“Screen1”的“以JSON格式显示列表”属性已经勾选（默认是勾选的）。
案例：JSON转字典
转换步骤：Web客户端 -> 列表 -> 字典，参考代码如下：
...
Resize image in the wiki of GitHub using Markdown
...jpg" width="324" height="324">
<p align="center">
<img src="screen1.png" width="256" height="455">
<img src="screen2.png" width="256" height="455">
<img src="screen3.png" width="256" height="455">
</p>
On above example I have used paragraph to align images s...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...re shown below.
Here’s how to implement the rotationSprite app:
On Screen1, there is a Canvas, Canvas1, which contains an ImageSprite (ArrowSprite) that we want to rotate. Label1 will show the Arrow’s heading in text format. Heading 0 points to right. We also add a RotationDetector (MyRo...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...re shown below.
Here’s how to implement the rotationSprite app:
On Screen1, there is a Canvas, Canvas1, which contains an ImageSprite (ArrowSprite) that we want to rotate. Label1 will show the Arrow’s heading in text format. Heading 0 points to right. We also add a RotationDetector (MyRo...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...re shown below.
Here’s how to implement the rotationSprite app:
On Screen1, there is a Canvas, Canvas1, which contains an ImageSprite (ArrowSprite) that we want to rotate. Label1 will show the Arrow’s heading in text format. Heading 0 points to right. We also add a RotationDetector (MyRo...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...re shown below.
Here’s how to implement the rotationSprite app:
On Screen1, there is a Canvas, Canvas1, which contains an ImageSprite (ArrowSprite) that we want to rotate. Label1 will show the Arrow’s heading in text format. Heading 0 points to right. We also add a RotationDetector (MyRo...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...re shown below.
Here’s how to implement the rotationSprite app:
On Screen1, there is a Canvas, Canvas1, which contains an ImageSprite (ArrowSprite) that we want to rotate. Label1 will show the Arrow’s heading in text format. Heading 0 points to right. We also add a RotationDetector (MyRo...
App Inventor 2 中的响应式设计 · App Inventor 2 中文网
...Fixed. To change the Screen.Sizing property, on the Designer screen with Screen1 selected in Components, go to Properties on the right-hand side of the App Inventor. You will find a box below “Sizing” that usually defaults to Fixed, located about 2/3 down. This property is set project-wide.
...
传感器组件 · App Inventor 2 中文网
... 假 则是写入模式。
注意： 该组件仅适用于应用程序的 Screen1 主屏幕！！
属性
最新消息
返回最近接收到的标签的内容。
启用读值模式
指定 NFC 硬件是否在读取模式下运行。读取模式 (真) 或 写入模式（假）。
写入...