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普通码农和CTO之间的差距，就是这7点了 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...职的时候公司所有的Service都返回一个这样的类：
err表示是否出错，代码里面还定义了一堆的错误代码；data表示实际执行的结果。所以每次调用都要执行一个if判断，如果错误代码不存在还需要自己新增一个。虽然我的项目经理...
Posting a File and Associated Data to a RESTful WebService preferably as JSON
...ending on the file size. For example, for our application, we need to send iPhone images that are 2-3 MB each. An increase of 33% is not acceptable. If you're sending only small 20KB images, that overhead might be more acceptable.
– Daniel T.
Nov 3 '10 at 3:14
...
Background image jumps when address bar hides iOS/Android/Mobile Chrome
...('#background');
// Fix background image jump on mobile
if ((/Android|iPhone|iPad|iPod|BlackBerry/i).test(navigator.userAgent || navigator.vendor || window.opera)) {
$background.css({'top': 'auto', 'bottom': 0});
$w.resize(sizeBackground);
sizeBackground();
}
function sizeBack...
difference between iframe, embed and object elements
...e embedded content to fit the object dimensions. most notable on safari in iPhone 4s where screen width is 320px and the html from the embedded URL may set dimensions greater.
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App Inventor 2 JDY-34双模蓝牙模块配置与通信教程 · App Inventor 2 中文网
...描
Q2: 连接后马上断开？
检查供电是否稳定（3.3V，峰值电流需要足够）
检查TX/RX是否接反
尝试降低波特率
Q3: BLE写入数据无反应？
确认使用了正确的Service和Characteristic UUID
确认Cha...
Some questions about Automatic Reference Counting in iOS5 SDK
...keep manual reference counted code around to address that older platform. iPhone OS 3.x perhaps, but I imagine Apple might discontinue support for that as a target platform once 5.0 ships, like they did for 2.x when 4.0 came out.
– Brad Larson♦
Jun 20 '11 at...
How to get my IP address programmatically on iOS/macOS?
... // Check if interface is en0 which is the wifi connection on the iPhone
if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
// Get NSString from C String
address = [NSString stringWithUTF8String:inet_...
What is the difference between Pan and Swipe in iOS?
...ce between pan and swipe actions and how to distinguish between them on an iPhone simulator. This answer does not address any of those issues, since it mentions neither swipe gestures nor iPhone simulators.
– Vince O'Sullivan
May 30 '17 at 8:45
...
MLKitDocScanner 拓展：文档扫描（自动找边缘、纠正透视、导出 PDF） · Ap...
...，用户扫完一页就直接进入确认界面。
AllowGalleryImport
是否允许用户在扫描界面里从相册选图片（而不是只能现场拍）。默认允许。
需要保证是现场拍摄（例如考勤、核验场景）时设为「假」。
ResultFormat
输出格式。
...
水果vs蔬菜智能分类器 - EdgeML图像识别项目 · App Inventor 2 中文网
...择包含水果或蔬菜的图片"
// 提供重试选项
if AskUser("是否重新选择图片?") {
ImagePicker1.SelectPicture()
}
}
6. 错误处理和异常管理
// 分类错误处理
when PersonalImageClassifier1.ClassificationError(errorMessage) {
StopClassi...