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POHow can I programmatically position a view using relative points?
 

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  1. POHow can I programmatically position a view using relative points?
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    <p>What is the best way to position a view relative to the size of its superview, when the bounds of the superview are not yet known?</p> <p>I am trying to avoid hard-coding coordinates if it is at all possible. Perhaps this is silly, and if so, that's a perfectly acceptable answer.</p> <p>I've run into this many times when working with custom UI. The most recent example is that I'm trying to replace the <code>UINavigationItem</code> plain-text title with a custom view. I want that view to fill the superview, but in addition, I want a <code>UIActivityIndicatorView</code> on the right side, inset about 2 pixels and centered vertically. Here's the code:</p> <pre><code>- (void) viewDidLoad { [super viewDidLoad]; customTitleView = [[UIView alloc] initWithFrame:CGRectZero]; customTitleView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth; titleLabel = [[UILabel alloc] initWithFrame:CGRectZero]; titleLabel.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth; titleLabel.lineBreakMode = UILineBreakModeWordWrap; titleLabel.numberOfLines = 2; titleLabel.minimumFontSize = 11.0; titleLabel.font = [UIFont systemFontOfSize:17.0]; titleLabel.adjustsFontSizeToFitWidth = YES; [customTitleView addSubview:titleLabel]; spinnerView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; spinnerView.center = CGPointMake(customTitleView.bounds.size.width - (spinnerView.bounds.size.width / 2) - 2, customTitleView.bounds.size.height / 2); spinnerView.hidesWhenStopped = YES; [customTitleView addSubview:spinnerView]; self.navigationItem.titleView = customTitleView; [customTitleView release]; } </code></pre> <p>Here's my problem: at the time that this code runs, <code>customTitleView.bounds</code> is still zeroes. The auto-resizing mask hasn't had a chance to do its thing yet, but I very much want those values so that I can compute the relative positions of other sub-views (here, the activity indicator).</p> <p>Is this possible without being ugly?</p>
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    1. USSteve Madsen
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      1. POHow can I programmatically position a view using relative points?
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      1. POHow can I programmatically position a view using relative points?
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      1. POHow can I programmatically position a view using relative points?
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    1. CO`titleLabel` and `spinnerView` are both leaked objects
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      1. POHow can I programmatically position a view using relative points?
      1. USShaggy Frog
    2. CO+1 for the question as I have the exact same one - looking forward to read the answers
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    3. CO`titleLabel` and `spinnerView` are not leaked. They are released elsewhere.
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      1. POHow can I programmatically position a view using relative points?
      1. USSteve Madsen
 

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