how to convert an int to NSString?

Question

I am converting an integer into String.

I did a search but here but it is not useful.

int i;
NSString *str;
str = [NSString stringWithFormat:@"%d",i];

[myString appendString:str];

It is not working throwing an error.

Answer 1

Try this:

str = [NSString stringWithFormat:@"%i",i];

edit: you need to use the proper placeholder for the type of variable you want to insert into the string.

edit2: appendString works for NSMutableStrings only. Either use NSMutable string or create a new string by using stringByAppendingString

Answer 2

You should do like this

    int i = 0;
NSString *str = [[NSString alloc] initWithFormat:@"%d",i];
myString = [myString stringByAppendingString:str];

Answer 3

Make sure that myString is a NSMutableString otherwise it will not work as NSString is im-mutable and does not have appendString:.

If myString is in fact a NSString, you can create a NSMutableString like so:

NSMutableString *myString = [NSMutableString stringWithString:@"Here's My String!"];

or create a mutable copy of your NSString:

NSMutableString *myMutableString = [myString mutableCopy];

Answer 4

[NSString stringWithFormat: @"%d", x];

Answer 5

    int i = 0;
NSMutableString *myString = [NSMutableString string];
NSString* myNewString = [NSString stringWithFormat:@"%d", i];
[myString appendString:myNewString];
NSLog(@"myString = %@", myString);  // result: myString = 0

A few things here...

• Make sure you assign your int a value, otherwise you'll get a (seemingly) random unsigned integer value
• Make sure myString is a NSMutableString if you want to use appendString
• For myNewString, it's more streamlined (and less confusing) to have the variable declaration on the same line as it's allocation.

See the question "How to do string conversions in Objective-C?" for other coercions like this.

Answer 6

There is no reason that it should not work. This is a perfect code.
Points to be care: myString should be mutable string.

int i;
NSString *str;
NSMutableString *myString;

str = [NSString stringWithFormat:@"%d",i];
*%d or %i both is ok.

[myString appendString:str];