How to convert NSNumber to NSString?
This is documented: the %@ format specifier will send the -description message to the corresponding receiver object. You can make your last line work in the same spirit by writing: NSString *myNSNumber2 = [[NSNumber numberWithFloat:-34512.23f] description]; .
How to use NSNumber in objective c?
You need to create it via a method invocation such as: [p setAge:[NSNumber numberWithInt:10]]; Your current code is attempting simply to cast the arbitrary integer 10 to a pointer.
What is NS number?
NSNumber is a subclass of NSValue that offers a value as any C scalar (numeric) type. It defines a set of methods specifically for setting and accessing the value as a signed or unsigned char , short int , int , long int , long long int , float , or double or as a BOOL .
What is NSString in objective c?
Like NSNumber, NSString is also immutable type. It’s used to represent text in Objective-C. NSString provides built-in support for Unicode, which means that we can include UTF-8 characters directly in string literals. It takes the same kind of format string as NSLog(). …
What is Nsrange?
A structure used to describe a portion of a series, such as characters in a string or objects in an array.
What is the difference between string and NSString?
NSString : Creates objects that resides in heap and always passed by reference. String: Its a value type whenever we pass it , its passed by value. like Struct and Enum, String itself a Struct in Swift. String is automatically bridged to Objective-C as NSString.
Is it possible to convert NSNumber to string?
The funny thing is that NSNumber converts to string automatically if it becomes a part of a string. I don’t think it is documented. Try these: We can get the number value in String.
What is NSNumber in C++?
An object wrapper for primitive scalar numeric values. NSNumber is a subclass of NSValue that offers a value as any C scalar (numeric) type. It defines a set of methods specifically for setting and accessing the value as a signed or unsigned char, short int, int, long int, long long int, float, or double or as a BOOL.
How to convert a string to INT in one line?
This can be done in one line if you already know the string will convert perfectly or you just don’t care. let myNumber = Int (“42222222222”)! Use the toInt () method.
How do you make a bool in NSNumber?
The NSNumber version of BOOL’s, char’s, int’s and double’s can all be created by simply prefixing the corresponding primitive type with the @ symbol; however, unsigned int’s, long’s, and float’s must be appended with the U, L, or F modifiers, as shown below.