Input a string from console using Objective C

Question

I am trying to enter a string (or a number of integers) from the command line using Objective C. These numbers are separated by a space.

Sample Input: 1 2 3 4 5

I am trying the code

char input[100] = {0};
NSString *inputString;
scanf("%s", input);
inputString = [NSString stringWithCString:input encoding:NSUTF8StringEncoding];

The resulting value of inputString is 1.

How do I get the entire value into the string ?

possible duplicate of Reading string from input with space character? — rmaddy
– rmaddy, Commented Mar 13, 2014 at 3:50

Nitish Makhija · Accepted Answer · 2016-08-10 18:03:23Z

5

NSLog(@"Enter the string : ");
NSFileHandle *input = [NSFileHandle fileHandleWithStandardInput];
NSData *inputData = [NSData dataWithData:[input availableData]];
NSString *inputString = [[NSString alloc] initWithData:inputData encoding:NSUTF8StringEncoding];
inputString = [inputString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSLog(@"%@", inputString);

Here try this more precise when talking objective C as the working language

answered Aug 10, 2016 at 18:03

Nitish Makhija

5595 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Lycon Over a year ago

to reduce number of lines i guess.... [[[NSString alloc] initWithData:[[NSFileHandle fileHandleWithStandardInput] availableData] encoding:NSUTF8StringEncoding] stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]];

Nitish Makhija Over a year ago

@KijitDesai sure makes more sense reducing the number of lines, works like a charm.

Merlevede · Accepted Answer · 2014-03-13 03:50:58Z

3

When you use %s in scanf it truncate the input at the first space. See here:

Any number of non-whitespace characters, stopping at the first whitespace character found. A terminating null character is automatically added at the end of the stored sequence.

You can use this according to this source:

scanf("%[^\n]s", intpu);

You can also use gets() as an alternative.

answered Mar 13, 2014 at 3:50

Merlevede

8,1781 gold badge26 silver badges40 bronze badges

Collectives™ on Stack Overflow

Input a string from console using Objective C

2 Answers 2

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related