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C++ 打开文件，以清空覆盖的方式 - C/C++ - 清泛网 - 专注C/C++及内核技术
...下：std::unique_ptr<ostream> stream = std::make_unique<fstream>("xxx", ios::trunc | ios::out | ios::in);*stream << "co C++ 打开文件，以清空覆盖的方式，代码如下：
std::unique_ptr<ostream> stream = std::make_unique<fstream>("xxx", ios::trunc | ios::out | ios::in);
*stream <<...
Detect permission of camera in iOS
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Check the AVAuthorizationStatus and handle the cases properly.
NSString *mediaType = AVMediaTypeVideo;
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
if(authStatus == AVAuthorizationStatusAuthorize...
:active pseudo-class doesn't work in mobile safari
...ders, I've posted a demo here: http://jsbin.com/EjiWILe/3/. Check the functionality on your iOS device.
– mhulse
Dec 19 '13 at 20:58
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How to access a mobile's camera from a web app?
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In iPhone iOS6 and from Android ICS onwards, HTML5 has the following tag which allows you to take pictures from your device:
<input type="file" accept="image/*" capture="camera">
Capture can take values like camera, camcorder...
Unzip files programmatically in .net
...ng SharpZipLib and it worked fine. I guess I'll have to see if the prohibition against third party libs and apss is a strict rule or more of a guidline.
– Petteri
May 7 '09 at 21:49
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How can I scan barcodes on iOS?
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We produced the 'Barcodes' application for the iPhone. It can decode QR Codes. The source code is available from the zxing project; specifically, you want to take a look at the iPhone client and the partial C++ port of the core library. The port is a little ol...
Difference between MEAN.js and MEAN.io
... there are two different stacks with either their own website and installation methods: mean.js and mean.io. So I came up asking myself this question: "Which one do I use?".
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Convert HTML to NSAttributedString in iOS
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In iOS 7, UIKit added an initWithData:options:documentAttributes:error: method which can initialize an NSAttributedString using HTML, eg:
[[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUTF8StringEncodi...
Is there any way to see the file system on the iOS simulator?
...re any way to browse the file system of a currently running or just killed iOS simulator? I'd settle for being able to see a specific app's files if there's a way to do that.
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Adding a simple UIAlertView
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Other answers already provide information for iOS 7 and older, however UIAlertView is deprecated in iOS 8.
In iOS 8+ you should use UIAlertController. It is a replacement for both UIAlertView and UIActionSheet. Documentation: UIAlertController Class Reference. A...