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Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...在有可能發生這種錯誤的函式呼叫前加上WSAIsBlocking()判斷是否有阻攔式函式正在執行。如果有的話，我們可能需要將正在進行的阻攔式函式取消掉，或是將目前想要做的事取消掉。
WSAEALREADY (10037) 函式作用已完成
這個錯誤...
How big should a UIBarButtonItem image be?
...lder devices like iPad 2 / Mini, 50px square for most current devices like iPhone 8 or iPad, and 75px square for Retina HD devices (the iPhone 6/7/8 Plus, or iPhone X). Asset catalogs will help immensely in keeping the different asset sizes organized (and Xcode can even generate them from vector sou...
MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...
...那个方法，最后记得在从服务器上启动复制，并检查工作是否正常：
mysql> START SLAVE;
mysql> SHOW SLAVE STATUS;
如果IO线程和SQL线程都显示Yes，就可以感谢上帝了：
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
如果显示No，则说明某些配...
大数据：用数据指导APP运营 - 资讯 - 清泛网 - 专注C/C++及内核技术
...系的。很简单的一个道理：
两个活动，一个活动送100台iPhone6，一个活动送1台iPhone6，哪个效果会好？
做运营的同学，请一定要认真的去评估每一个运营动作背后的成本。
而所谓“收益”，并不等价于“收入”，获得金钱是收...
Using NSPredicate to filter an NSArray based on NSDictionary keys
...
Does NSPredicate work on the iPhone? It works great on the sim but running it on the iPhone gives an error that the NSPredicate class could not be found.
– lostInTransit
Sep 25 '09 at 4:28
...
iOS 7 style Blur view
...o reduce the number of pixels the Gaussian blur has to operate over, so an iPhone 4S can blur the entire screen in roughly 30 ms using this operation.
You still have the challenge of how to pull content into this blur from views behind this one in a performant manner.
...
What is Data URI support like in major email client software?
... clients do show data URIs:
Android 2.3
Android 4.0
BlackBerry 5 OS
iPad
iPhone 3GS
iPhone 4S
iPhone 5
None of the webmail clients showed data URIs.
These desktop clients don't:
Lotus Notes 6.5
Lotus Notes 7
Lotus Notes 8.5
Outlook 2000
Outlook 2002/XP
Outlook 2007
Outlook 2010
Outlook 2011
O...
Rounded UIView using CALayers - only some corners - How?
...
I used the answer over at How do I create a round cornered UILabel on the iPhone? and the code from How is a rounded rect view with transparency done on iphone? to make this code.
Then I realized I'd answered the wrong question (gave a rounded UILabel instead of UIImage) so I used this code to ch...
How to get an IFrame to be responsive in iOS Safari?
...to the width attribute to get the iframe responsive-web-design ready on an iPhone 4 with iOS 7
– malisokan
Jan 8 '15 at 16:05
...
NSDefaultRunLoopMode vs NSRunLoopCommonModes
...View or something, the downloading process gets halted as soon as I touch iPhone screen. Thankfully, an awesome blog post by Jörn suggests an alternative option, using NSRunLoopCommonModes for connection.
...