null returned by NSMutableString

I have an NSMutableString which I append other strings to.

When I print the String I get null.

in the .h file

NSMutableString *name;
@property(nonatomic, retain) NSMutable开发者_如何学CString *name;

in the .m file

@synthesize name;

-(IBAction) a {
if (uppercase == 1) {
    [name appendString:@"A"];
    NSLog(@"name: %@", name);
}
else
    [name appendString:@"a"];
    NSLog(@"name: %@", name);
}

I get the following print out when triggering the action.

name: (null)

Why is this returning null?

---

My guess is that you never initialized it. Something like:

- (id)init {
    // Standard init code here...
    self.name = [NSMutableString stringWithString:@""];
}

... to ensure that you have a valid object to work with?

---

Are you setting the value of 'name' anywhere in your code? In the code you've pasted in your question, 'name' never gets set. You can't append a string to something that doesn't exist - you're effectively trying to append a value to null, which is why nothing gets returned.

So I guess my answer would be: based on the code you've shown, name never has anything assigned to it. If you are assigning a string to 'name', your problem is elsewhere, but you'd need to post the code for the assignment etc.