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UIActivityViewController crashing on iOS 8 iPads

...resentationController { popoverController.sourceRect = CGRect(x: UIScreen.main.bounds.width / 2, y: UIScreen.main.bounds.height / 2, width: 0, height: 0) popoverController.sourceView = self.view popoverController.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)...
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HTML img tag: title attribute vs. alt attribute?

... If you had a disability and required a screen reader, I'm pretty sure you wouldn't appreciate being referred to as an "edge case". – Matt Fletcher Mar 14 '19 at 11:53 ...
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Why is the Windows cmd.exe limited to 80 characters wide?

... click the title bar, select properties, and in the "Layout" tab alter the screen buffer size (line width and scrollback) and the window size (viewport size). If you started cmd from a shortcut, you can save these settings for future sessions. ...
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Can the Android drawable directory contain subdirectories?

...alize your application, also if you have different resources for different screen densities, so it is not a solution, just a workaround valid for only some cases. – Fran Marzoa Jul 5 '12 at 11:14 ...
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MFC MDI切换menu原理 - C/C++ - 清泛网 - 专注C/C++及内核技术

...第二个来源是 CDocument::GetDefaultMenu(),这也是虚拟。它的默认实现将返回 NULL。可以重写此函数允许程序以选择要显示的菜单。 手动更改菜单是通过调用 OnUpdateFrameMenu() 和 DrawMenuBar()。要设置到窗口中的新建菜单上,则必须调用 C...
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NSIS内置路径命令详解 - C/C++ - 清泛网 - 专注C/C++及内核技术

...解释常用命令的含义,适合nsis初学者学习使用。$INSTDIR=默认安装路径 ! $PROGRAMFILES=C:\Program Files! $TEMP=临时文件夹! $DESKTOP=桌面! $SYSDIR=C:\WINDOWS\system32! $EXEDIR=我的文档! $WINDIR=C:\WINDOWS! $STARTMENU=相对应用户名称的「开...
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C++的公有继承、保护继承、私有继承有什么区别? - C/C++ - 清泛网 - 专注C...

...员了。 详细的访问权限如下: public:(不指定的话,默认是公有继承)基类所有公有成员、保护成员可访问权限不变。 protected:基类所有公有成员、保护成员均成为子类的保护成员。 pirvate:基类所有公有成员、保护成员...
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std::string的截取字符串的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...start开始。 如果有匹配,则返回匹配位置;否则,返回-1.默认情况下,start为0,函数搜索整个字符串。 int find_last_of(char c): 查找字符串中最后一个出现的c。有匹配,则返回匹配位置;否则返回-1.该搜索在字符末尾查找...
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Unicode and UTF-8 - C/C++ - 清泛网 - 专注C/C++及内核技术

...以通过获得其文件大小/2即可计算得知包含的字符数。Java默认使用UTF-16 BE编码。 那么为什么会出现utf-8呢: 1)、和ASCII码不兼容,而且不太好移植(Not Portable) 例如:char *s=“Good ,北京”;该C语言代码采用UTF-16编码后,字节序列...
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MFC CSyncObject,CSingleLock,CMultiLock同步类 - C/C++ - 清泛网 - 专注C/C++及内核技术

...须根据需要给出各自的实现。 2)带参数的 UnLock(),默认情况下都返回TRUE。 3、构造函数有: 1)CSyncObject::CSyncObject(LPCTSTR pstrName) 2)CSyncObject::~CSyncObject() 3)CSyncObject::Lock(DWORD dwTimeOut) 4、在CSyncObject类...