iPhone 导航栏标题颜色

BY Steven Fisher

You need to use a UILabel as the titleView of the navigationItem.

The label should:

    Have a clear background color (label.backgroundColor = [UIColor clearColor]).
    Use bold 20pt system font (label.font = [UIFont boldSystemFontOfSize: 20.0f]).
    Have a shadow of black with 50% alpha (label.shadowColor = [UIColor colorWithWhite:0.0 alpha:0.5]).
    You'll want to set the text alignment to centered as well (label.textAlignment = UITextAlignmentCenter).

Set the label text color to be whatever custom color you'd like. You do want a color that doesn't cause the text to blend into shadow, which would be difficult to read.

I worked this out through trial and error, but the values I came up with are ultimately too simple for them not to be what Apple picked. :)

If you want to verify this, drop this code into initWithNibName:bundle: in PageThreeViewController.m of Apple's NavBar sample. This will replace the text with a yellow label. This should be indistinguishable from the original produced by Apple's code, except for the color.

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self)
    {
        // this will appear as the title in the navigation bar
        CGRect frame = CGRectMake(0, 0, 400, 44);
        UILabel *label = [[[UILabel alloc] initWithFrame:frame] autorelease];
        label.backgroundColor = [UIColor clearColor];
        label.font = [UIFont boldSystemFontOfSize:20.0];
        label.shadowColor = [UIColor colorWithWhite:0.0 alpha:0.5];
        label.textAlignment = UITextAlignmentCenter;
        label.textColor = [UIColor yellowColor];
        self.navigationItem.titleView = label;
        label.text = NSLocalizedString(@"PageThreeTitle", @"");
    }

    return self;
}

(As an aside, I've actually searched for an answer to this problem myself in the months since I first posted it. Imagine my surprise when it was my answer! That's part of why I've come back to clean it up a little...)