macOS newbie question: How to get input from a user for an object such as NSString

kingthong said:

Hi,

it might be a silly question but i've just started learning Objective-C.
My question is how do you get input from a user after initializing an object of NSString type.

i.e say i've initialized

Code:

NSString *name;
name = [[NSString alloc] init] ;

i want the user to enter the value for Name. can i use a scanf?
I've tried googling but to no avail.

Thanks!

Click to expand...

//Garbage collection or a pool must be present

//Declare Variables
char cString[100]; //cString is a string of 100 characters (technically an array of 100 characters)
NSString *myString;
	
//Get the string form the user
NSLog(@"Enter a string...");
scanf("%s", &cString);

//Convert to NSString
myString = [NSString stringWithCString: cString encoding: NSASCIIStringEncoding];

//Log Result
NSLog(@"You entered: %@", myString);

kingthong said:

Thanks for the prompt reply!

One more question as an addendum-

1. Is this the only/most efficient way to read an input from a user? I will be coding on an IPhone eventually so memory and efficiency will be vital.

Thanks again.

Click to expand...

NSString *myString = nil;

myString = [textBox stringValue];

MareoRaft said:

When I do this, I get the error "warning: passing argument 1 of 'stringWithCString:encoding:' makes pointer from integer without a cast"

Is there some #import statement I should be including?

Click to expand...

gnasher729 said:

I recommend using Xcode and the Clang compiler, not gcc. You will get much better error messages.

Click to expand...

Hans Kamp said:

I would vote for Xcode, the IDE, because it is similar to Delphi and C++Builder in the past.

Instead of

Code:

myString = [textBox stringValue];

I remember having used

Code:

myString = self.textBox.stringValue;

I have to check it soon, whether I am right about this.

Click to expand...

myString = [[self textBox] stringValue];
myString = self.textBox.stringValue;

myString = self.textBox1.stringValue = self.textBox2.stringValue;

ArtOfWarfare said:

Quick question... is it possible to write a setter function which returns the value set as use it with dot notation? It might allow something like:

Code:

myString = self.textBox1.stringValue = self.textBox2.stringValue;

Or am I mistaken?

Click to expand...

   self.count++

  (tmp = self.count, self.count = tmp + 1, tmp)