大约有 8,000 项符合查询结果(耗时:0.0168秒) [XML]

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微博为什么限制140字(附短信70字限制考) - 闲聊区 - 清泛IT社区,为创新赋能!

...申请过那么多的微博,数申请网易微博的动机最不纯,因为它的字数限制不是传说中的140字,而是163个字。当年觉得很可爱,于是就注册了,之后再也没登录过。今天在人人网转发状态,提示我超过140字了,突然就好奇大家都在...
https://www.tsingfun.com/it/cpp/1298.html 

OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...这些控件经常发送带附加数据的通告消息。设计者们没有为每一个需要附加数据的通告消息增加一个新的WM_* 消息,而是只增加了一个消息,WM_NOTIFY,这个消息可以通过一标准化格式传递任意多的额外数据。 WM_NOTIFY消息包括 保...
https://bbs.tsingfun.com/thread-3044-1-1.html 

App Inventor 2 字典 vs 列表:同样存数据,性能差了10倍? - App应用开发 ...

...td>添加列表项即可</td></tr><tr><td>按日期修改</td><td>日期作为键,直接覆盖 O(1)</td><td>需先找到位置再替换 O(n)</td></tr><tr><td>批量导入</td><td>用合并字典一次合并</td><td>需逐条添加或拼接列表</td></tr><tr><td>删除中间项</td><td>删除键...
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Hand Coded GUI Versus Qt Designer GUI [closed]

...ng to tweak code as well -- in ways that aren't well understood. Learning iPhone development, for example, I've found it frustrating to hit 'magic' visual stuff ('drag from the empty circle in the Connections inspector to the object in the Interface Builder window...') that would be simpler (for me...
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Should IBOutlets be strong or weak under ARC?

... @Rocotilos The first iPhone had very limited RAM. If I recall correctly, 128 MB, leaving around 10 MB for the active app. Having a small memory footprint was crucial, hence there was view unloading. That changed as we now have more and more RAM, ...
https://bbs.tsingfun.com/thread-3066-1-1.html 

App Inventor 2 蓝牙发送十六进制字节方案:文本转Hex字节详解 - App应用开...

... 每两个字符代表一个十六进制字节,需要将字符对解析为实际的字节值。 问题本质输入期望发送实际发送(当前问题)&quot;ABCD&quot;[0xAB, 0xCD](2字节)[0x41, 0x42, 0x43, 0x44](4字节ASCII)解决方案核心思路:遍历字符串,每两个字...
https://www.tsingfun.com/it/cpp/1508.html 

xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false...

xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false”(性能警告) 1>C: Program Files (x86) Microsoft Visual Studio 11.0 VC include xtree(1796): warning C4800: int: 将值强制为布尔值true或f...1>C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\inc...
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STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术

...d::_Tree<_Traits> &,const std::_Tree<_Traits> &)”: 无法从“const a”为“const std::_Tree<_Traits> &”推导 模板 参数 1> f:\vs2008\vc\include\xtree(1466) : 参见“std::operator <”的声明 1> f:\vs2008\vc\include\functional(142): 编译类 模板 成员函数“...
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Resize image in PHP

...&amp;&amp; !empty($exif['Orientation']) &amp;&amp; preg_match('/(apple|ios|iphone)/i', $exif['Make'])) { switch($exif['Orientation']) { case 8: if ($width &gt; $height) $newImage = imagerotate($newImage,90,0); break; ...
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How to vertically center a container in Bootstrap?

... laborum.&lt;/div&gt; &lt;/div&gt; &lt;div class="col-md-5 iPhone-features"&gt; &lt;ul class="top-features"&gt; &lt;li&gt; &lt;span&gt;&lt;i class="fa fa-random simple_bg top-features-bg"&gt;&lt;/i&gt;&lt;/span&gt; &lt;p&gt;&lt;strong&gt;...