Question

ten.textValue = [[NSMutableString alloc]init];
ten.textValue = [NSMutableString stringWithString:textField.text]; 

I am getting crash at second line.
ten.textValue is NSMutableString.

Answer 1

When you create your ten.textValue = [[NSMutableString alloc]init]; you are creating an object that you own.

When you try to add a string to it in the next line, you are creating an autoreleased string. This is confusing the compiler, which is reporting “hang on – this is an allocated, owned object already”.

Instead:

if(ten.textValue)
{
    ten.textValue = [NSMutableString stringWithString: textField.text]};
}