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App Inventor 2 AnimatedGif扩展教程 - 显示GIF动画 · App Inventor 2 中文网
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概述
为什么需要扩展？
KIO4_AnimatedGif扩展
下载
基本用法
控制播放
GIF文件放置位置
替代方案：WebView显示GIF
常见问题
Q1: GIF不显示动画？
Q2: GIF播放卡顿？
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Why does an image captured using camera intent gets rotated on some devices on Android?
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answered Dec 28 '12 at 7:38
Jason RobinsonJason Robinson
28.5k1717 gold badges7171 silver badges128128 bronze badges
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How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
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13 Answers
13
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How do I deserialize a JSON string into an NSDictionary? (For iOS 5+)
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335
It looks like you are passing an NSString parameter where you should be passing an NSData para...
How to add spacing between UITableViewCell
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30 Answers
30
Active
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How do I find out my python path using python?
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Mark RansomMark Ransom
260k3737 gold badges328328 silver badges564564 bronze badges
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What is the difference between #import and #include in Objective-C?
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The #import directive was added to Objective-C as an improved version of #include. Whether or ...
How to iterate a loop with index and element in Swift
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Yes. As of Swift 3.0, if you need the index for each element along with its value, you can use the enumerated() method to iterate over the array. It returns a sequence of pairs composed of the index and the value for each item in the array. F...
How to instantiate a File object in JavaScript?
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According to the W3C File API specification, the File constructor requires 2 (or 3) parameters.
So to create a empty file do:
var f = new File([""], "filename");
The first argument is the data provided as an array of lines of text;
The se...
Arduino101 引脚 · App Inventor 2 中文网
...入数字引脚，请参阅Arduino101PWM扩展。
Parameters:
* value (_number_) —
The value to write to the pin. Valid values depend on whether the pin is digital or analog.
事件
PinStateReceived – 当引脚被读取或接收到更新时，将运行Pi...