大约有 300 项符合查询结果（耗时：0.0148秒） [XML]
App Inventor 2 图片处理教程 - 缩放、裁剪、存储与转换 · App Inventor 2 中文网
...function resizeImage(dataUrl, maxW, maxH) {
var img = new Image();
img.onload = function() {
var ratio = Math.min(maxW / img.width, maxH / img.height);
var w = Math.floor(img.width * ratio);
var h = Math.floor(img.height * ratio);
var canvas = document.getElementById('canvas');
...
App Inventor 2 图像矫正教程 - 透视变换与文档扫描 · App Inventor 2 中文网
...")){
var base64 = msg.substring(8);
var img = new Image();
img.onload = function(){
// 透视变换矫正
var src = cv.imread(img);
var dst = new cv.Mat();
// 定义原始四角和目标四角
var srcPts = cv.matFromArray(4, 1, cv.CV_32FC2, [100,50, 350,30, ...
App Inventor 2 实现上传文件到服务器全方案总结 · App Inventor 2 中文网
...eight: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-pop { font-size: 13px; line-height: 14px; padding: 10px 7px; } .feedback-pop .feedback-img {...
App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
...id,url,message)
Event raised when Js have to show an alert to user
OnJsConfirm(id,url,message)
Tells to display a confirm dialog to the user.
OnJsPrompt(id,url,message,defaultValue)
Event raised when JavaScript needs input from user
OnNewWindowRequest(id,isDialog,isPopup)
Event raised ...
App Inventor 2 构建苹果 iOS App · App Inventor 2 中文网
...eight: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-pop { font-size: 13px; line-height: 14px; padding: 10px 7px; } .feedback-pop .feedback-img {...
[SOLVED] Can't send payload > 23bytes(MTU setted to 128bytes) - #9 by ...
...lace to request an MTU change.
From the name of the event, I imagine it is confirming the success of the attempt to change the MTU that you did not yet submit (a temporal anomaly)
Here is the doc page:
http://iot.appinventor.mit.edu/#/bluetoothle/bluetoothleintro
Here is the doc for the event:
MTU...
App Inventor 2 ColorUtilities 拓展：#ececec 等16进制颜色转换为AppInven...
...eight: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-pop { font-size: 13px; line-height: 14px; padding: 10px 7px; } .feedback-pop .feedback-img {...
ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
...eight: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } 文档反馈 切换 目录 在线 客服 扫码添加客服咨询 我要 分享 ...
ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
...eight: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-pop { font-size: 13px; line-height: 14px; padding: 10px 7px; } .feedback-pop .feedback-img {...
App Inventor 2 Web客户端（Web）详细用法示例 · App Inventor 2 中文网
...套积木，多端原生打包！ 下载 AI2伴侣 · 安卓/鸿蒙/iOS aia 源码商店 中文社区 中文教育版 各版本对比 关于 关于我们 发布日志 服务条款 ...