How to convert NSString value to NSData value?

First off, you should use dataUsingEncoding: instead of going through UTF8String. You only use UTF8String when you need a C string in that encoding. Then, for UTF-16, just pass NSUnicodeStringEncoding instead of NSUTF8StringEncoding in your dataUsingEncoding: message. For Swift 3, you will mostly be converting from String to Data.

When to use UTF8String instead of NSData?

You only use UTF8String when you need a C string in that encoding. Then, for UTF-16, just pass NSUnicodeStringEncoding instead of NSUTF8StringEncoding in your dataUsingEncoding: message. For Swift 3, you will mostly be converting from String to Data.

What is output of Hex NSString to NSData exceptionshub?

The following is the output: which looks totally irrelevant to me. Any idea/ suggestions on where its going wrong?

How to return NSString object in Objective C?

Return Value An NSString object initialized by converting the bytes in data into Unicode characters using encoding. The returned object may be different from the original receiver. Returns nil if the initialization fails for some reason (for example if data does not represent valid data for encoding).

What kind of string format does NSString use?

NSString uses a format string whose syntax is similar to that used by other formatter objects. It supports the format characters defined for the ANSI C function printf (), plus %@ for any object (see String Format Specifiers and the IEEE printf specification ).

What can nsdate be used for in Mac?

NSDate objects can be used in conjunction with DateFormatter objects to create localized representations of dates and times, as well as with NSCalendar objects to perform calendar arithmetic. NSDate is toll-free bridged with its Core Foundation counterpart, CFDate.