Very simple syntax question!

[chrigil]

Can anyone help me understand the difference between the following please. As you can probably tell I'm new to Objective-C but as with many languages, explanations about simplistic things like the below are often hard to find.

Basically I just want to know the difference between the following:

NSString* myString;
NSString *myString;

Also the difference between the following (if both are valid??):

- (void)doSomething:(UILabel *)label { 

} 

AND

- (void)doSomething:(UILabel)label { 

}

Thanks in advance

Chris

[RLScott]

It makes no difference if there are spaces before or after the *.

As for the second issue, all Objective C objects are referenced through pointers, so (UILabel) is never right. Use (UILabel*).

[SteveMobs]

check out Wikipedia ;-)

C variable types and declarations - Wikipedia, the free encyclopedia

However, the standard also allows you to attach the asterisk to the name of the type such as long* circle. This form is usually discouraged since it can confuse the novice when multiple pointers are declared on the same line:

long* first, second;

will result in first being a pointer to a long, but second being a long itself, which is likely not what a beginner expects.

So, basically, there is no difference but it is common to add the asterix in front of the name of the variable (and not after the type).

[chrigil]

Thanks both of you I'll check out the Wiki page.