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Take screenshots in the iOS simulator
I want to take a screenshot of my iOS application when it is running in the simulator, and save the screenshot on my Mac. How can I do this?
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When to use IMG vs. CSS background-image?
...the meaning of the image can be communicated in all user-agents, including screen readers.
Pragmatic uses of IMG
Use IMG plus alt attribute if the image
is part of the content such as a logo or diagram or person (real person, not stock photo people).
—sanchothefat
Use IMG if you rely on bro...
C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...app.ReleaseDispatch();
m_app=NULL;
}
//关闭打开的Excel 文件,默认情况不保存文件
void CExcelOp::CloseExcelFile(BOOL if_save)
{
//如果已经打开，关闭文件
if (open_excel_file_.IsEmpty() == FALSE)
{
//如果保存,交给用户控制,让用户自己存，如果...
Media Queries: How to target desktop, tablet, and mobile?
...in "mobile-first" design, wherein you start by designing for your smallest screens, and then add ever-increasing media queries, working you way onto larger and larger screens. Regardless of whether you prefer min-, max-, or combinations thereof, be cognizant of the order of your rules, keeping in mi...
Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术
...可以用 boost::asio::ip::tcp::resolver::iterator 来进行迭代.iterator默认的构造函数生成一个end iterator.
tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
tcp::resolver::iterator end;
现在我们建立一个连接的sockert,由于获得节点既...
How can I get the active screen dimensions?
...
Screen.FromControl, Screen.FromPoint and Screen.FromRectangle should help you with this. For example in WinForms it would be:
class MyForm : Form
{
public Rectangle GetScreen()
{
return Screen.FromControl(this).Bound...
CSS media queries: max-width OR max-height
...
Use a comma to specify two (or more) different rules:
@media screen and (max-width: 995px) , screen and (max-height: 700px) {
...
}
From https://developer.mozilla.org/en/CSS/Media_queries/
...In addition, you can combine multiple media queries in a comma-separated list; if any ...
UICollectionView Set number of columns
...e method responsible for determining the size of the Cell. I then took the screen width and divided it with my column requirement. For example, I wanted to have 3 columns on each screen size. So here's what my code looks like -
- (CGSize)collectionView:(UICollectionView *)collectionView
...
Finish all previous activities
My application has the following flow screens :
26 Answers
26
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App Inventor 2 中的响应式设计 · App Inventor 2 中文网
...icky issue in designing apps is making apps that look good on devices with screens of differing sizes. For example, apps designed for a given phone should also look good on tablets or phones with a different screen size. Making apps that have this property is called responsive design.
A common ap...