Umair Khan Jadoon questions

• Getting 'Stream does not support writing.' Exception in the following code
• Calling OpenCart library functions in a PHP file outside of the framework
• Unescaped control characters in NSJSONSerialization
• Facebook JavaScript SDK: FB.ui opens a popup window
• Capturing full screenshot with status bar in iOS programmatically
• Running background services in iOS
• document.getElementbyId() returning null [duplicate]
• Getting index of a character in NSString with offset & using substring in Objective-C
• How to get DateTime.Now() in YYYY-MM-DDThh:mm:ssTZD format using C# [duplicate]
• Simple string concatenation in Objective C

Umair Khan Jadoon answers