Consider,
NSString *myString = @"Welcome";
NSLog(@"%@",myString);
will print Welcome in console.
Can I print the string like "myString: Welcome"?
I mean, can I get the object name("myString") along with object value("Welcome")?
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Confused
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You can do like.. NSLog(@"myString : %@",myString); – Ashok Londhe Apr 27 '15 at 10:42
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But he would to print his variable name – Coldsteel48 Apr 27 '15 at 10:42
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@confused if you satisfied with my answer then please mark it as a accepted. – Ashok Londhe Apr 27 '15 at 11:43
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@AshokLondhe I knew to print like NSLog(@"myString : %@",myString); I want to print the object name without typing its name. – Confused Apr 27 '15 at 11:47
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1no.. i have posted my answer you can see that. – Ashok Londhe Apr 27 '15 at 11:47
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Marked as the right answer. Thanks :) – Confused Apr 27 '15 at 11:51
1 Answers
6
Use the following code:
#define stringVariable(x) NSLog( @"%s:%@",#x, x)
NSString *myString=@"Welcome";
stringVariable(myString);
Note: The general principle is that when you put a # in front of an argument within the body of a #define, the preprocessor replaces it with a C string of the exact expression passed to the macro. When you pass a variable name, you'll get that name.
Ashok Londhe
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2This is correct, but I'd advise to use a different macro name. `stringVariable` might conflict with existing variable names. And since it is a macro, it might cause tricky and not obvious errors. Usually, all-uppercase is used for macros. In conjunction with a prefix, it should be more or less safe. Something like `CF_LOG_OBJECT_VARIABLE(x)`. You don't have to type it anyway. Viva la autocomplete :) – FreeNickname Apr 27 '15 at 11:00
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@FreeNickname Thanks for suggestion next time sure i will do that. – Ashok Londhe Apr 27 '15 at 11:25
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@AshokLondhe Just for the clarification. I tried the above code and its worked. But when I try this without defining it as macro, means I tried "NSLog( @"%s:%@",#myString, myString) " and it throws an error "Expected expression". Any idea? – Confused Apr 27 '15 at 11:55
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Yes.. Because of that i have declare that as a macro. i thing only solution to it is macro. – Ashok Londhe Apr 27 '15 at 11:57