Objective C unable to update UILabel more than once

I have a method which I created that appends some new text to a UILabel. I've tried two ways of doing this (one is commented out) 开发者_开发百科but both of them only update the label the first time. Any more calls to this method do not update the label.

- (void) updateLog: (NSString*) text  
{ 
/*   
    NSMutableString *newText = [logLabel.text mutableCopy];  
    [newText appendString: text];  
    logLabel.text = newText;  
*/  
    logLabel.text = [logLabel.text stringByAppendingFormat:@"%@", text];  
}

I am calling the method like this (the method is in the viewController):

[viewController updateLog: @"\nStarting...\n"]; // Works  
[viewController updateLog: @"Test\n"];  // Does not work

I have searched everywhere for an answer, what am I missing? Thanks!

UILabel, unless set up otherwise, only displays a single line of text.

Change the numberOfLines property if you want more.

I actually figured this out. Turns out the string WAS being successfully updated, but the label size was too small, so the text was hidden.