Is there anyway we can take input from command line in Objective-C, the way we can take in C/C++?
int inputVariableName;
cin >> inputVariableName;
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4 Answers
scanf("%i", userInput);
just as you would in c
To get Objective-C objects from the input, simple convert them after reading them in:
NSNumber * number = [nsnumber numberwithint:useriput];
3 Comments
itsaboutcode
But i have another question, though it can solve my problem by now but if have an Object which has NSString or NSNumber objects within it, how i can take input for them? Since there is there no way scanf can handle these kind of objects?
itsaboutcode
I think i got answer to my second question on the following ur: stackoverflow.com/questions/493688/…
bot47
Shouldn't scanf("%i", userInput) read scanf("%i", &userInput)?
Sure. Compile your code as Objective-C++.
This is typically as easy as renaming the file from having a .m suffix to a .mm suffix.
Documentation is included with the Xcode tools as to the details of Objective-C++.
3 Comments
itsaboutcode
I don't know about Objective-C++ but is there any native way in Objective-C?
bbum
Objective-C++ is native Objective-C. But, yes, you can do this in pure Objective-C. See the NSFileHandle class.
bbum
@Dmitry What doesn't work? Compiling the code as C++ works fine has been supported for over a decade. And it includes the standard library.
As bbum mentioned, you can use NSFileHandle to get access to stdin. If you just want to read the command line arguments, you can get them from [[NSProcessInfo processInfo] arguments]. It's also worthwhile to know what else NSProcessInfo can tell you.
Comments
Command line input with spaces
char textInput[1000];
scanf("%[^\n]%*c", textInput);
NSString* userInput = [NSString stringWithUTF8String:textInput];
NSLog(@"\n%@\n%@", @"Hello, World.", userInput);
Input text with white spaces, 1000 is input character limit.
