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BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...对点通信。广播访问地址广播包：广播包Access Address 固定为0x8E89BED6，广播包只能在广播信道（channel）上传输，即只能在37/38/39信道上传输（注：从蓝牙5.0开始广播包可以在其它信道上传输）。广播包发送给附近所有的observer（扫...
How to push both value and key into PHP array
...asn't been posted yet:
$arr = ['company' => 'Apple', 'product' => 'iPhone'];
$arr += ['version' => 8];
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Check that an email address is valid on iOS [duplicate]
I am developing an iPhone application where I need the user to give his email address at login.
4 Answers
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How to get a list of column names on Sqlite3 database?
I want to migrate my iPhone app to a new database version. Since I don't have some version saved, I need to check if certain column names exist.
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UIBarButtonItem with custom image and no border
...te a UIBarButtonItem with a custom image, but I don't want the border that iPhone adds, as my Image has a special border.
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How to create directory automatically on SD card
...hich has something other than an SD Card (such as built-in flash, a'la the iPhone). Either way you should keep in mind that you need to check to make sure it's actually there as the SD Card may be removed.
UPDATE: Since API Level 4 (1.6) you'll also have to request the permission. Something like th...
Using two values for one switch case statement
... @trig lol. I'm doing that kind of thing a lot lately - blaming iPhone thumb typing. Cheers
– Bohemian♦
May 23 '13 at 12:17
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杭州科技业为中国经济点亮未来 - 资讯 - 清泛网 - 专注C/C++及内核技术
杭州科技业为中国经济点亮未来据国外媒体报道, 中国2015年的增长目标降至25年来的最低点。与此形成对比的是浙江省第一季度的经济增速达到8 2%。作为阿里巴巴和快滴的故
据国外媒体报道, 中国2015年的增长目标降至25年来...
解决：InnerException 消息是“ValueType“System.Decimal”不能为 Null。...
...错: xxx。InnerException 消息是“ValueType“System.Decimal”不能为 Null。”。有关详细信息，请参见 InnerException。
原因：WCF服务器端出错，抛出了Decimal不能为null的异常，所以要从服务器端代码查起，可能的原因是没有对decimal?（可空d...
BLE数据收发 20个字节的限制问题 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...尝试超过20个字节就会自动忽略掉后面的字节RequestMTU – 为 BluetoothLE 连接请求新的最大传输单元 (MTU)。此功能仅在两个设备都支持蓝牙 4.2 或更高版本时才受支持。如果 MTU 更改成功，则 MTUChanged 事件将被触发。默认 MTU 为 20。
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