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iOS Ad Hoc 和 App Store 区别 - App应用开发 - 清泛IT社区，为创新赋能！
...ID 格式（36位）
???? 但不是苹果设备 UDID
2️⃣ 真正的 iPhone UDID 长什么样
苹果设备 UDID（尤其是真机）通常是：
常见格式（两种）
40位十六进制（老设备常见）
00008020A1B2C3D4E5F60718293A4B5C6D7E8F90
25位左右（新设备 / iOS 16+ ...
米思齐(Mixly) × App Inventor2 接入调研报告：技术路线、接入步骤与教程...
...串口被 App 占用会失败——先断蓝牙再上传
• 经典蓝牙 iPhone 不支持，iOS 客户必须走 BLE 路线
参考资源：Mixly 官方文档 https://mixly.readthedocs.io（注意：mixly.org.cn 域名当前已失效，请勿引用）
后续将陆续发布系列教程实战篇...
手机App控制Arduino：米思齐+App Inventor2蓝牙实战教程（图文） - 创客硬...
...线手机App搭建平台
手机：Android（经典蓝牙方案不支持iPhone，iOS用户请等本系列BLE篇）
第一步：接线
HC-05与Arduino连接（注意TX/RX交叉）：
• HC-05 VCC → Arduino 5V
• HC-05 GND → Arduino GND
• HC-05 TXD → Arduino D0 (RX)
• HC-05 RXD ...
NSString with \n or line break
...ms working for me.
I am using Xcode 4.6 with IOS 6.0 as target. Tested on iPhone 4S. Try it by yourself.
Feng Chiu
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【Mixly×AI2系列·第5讲】手机发指令控制LED/舵机：蓝牙双向通信实战① - ...
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• 指令无反应 → 波特率不一致，确认双方都是 9600
• iPhone 连不上 → iOS 不支持 SPP，换 BLE 路线（第3讲扩展）
• 舵机乱转 → 指令粘包，保持
结尾、按行解析
八、课后练习
1. 增加一个"闪烁"指令（BLINK），硬...
Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
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I just did a simple benchmark (on iPhone 5) and it looks like dispatch_once is about 2x faster than @synchronized.
– Joshua Gross
Oct 1 '13 at 18:44
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I ran it on my iPhone 5 and your code works. It must be a bug in the simulator.
– Jay
Jun 23 '14 at 0:34
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