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POWhy is the top portion of my UISegmentedControl not tappable?
 

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  1. POWhy is the top portion of my UISegmentedControl not tappable?
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    <p>While I was playing on my phone, I noticed that my UISegmentedControl was not very responsive. It would take 2 or more tries to make my taps register. So I decided to run my app in Simulator to more precisely probe what was wrong. By clicking dozens of times with my mouse, I determined that the top 25% of the UISegmentedControl does not respond (the portion is highlighted in red with Photoshop in the screenshot below). I am not aware of any invisible UIView that could be blocking it. Do you know how to make the entire control tappable?</p> <p><img src="https://i.stack.imgur.com/06bkB.png" alt="uinavigationbar uisegmentedcontrol"></p> <pre><code>self.segmentedControl = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Uno", @"Dos", nil]]; self.segmentedControl.selectedSegmentIndex = 0; [self.segmentedControl addTarget:self action:@selector(segmentedControlChanged:) forControlEvents:UIControlEventValueChanged]; self.segmentedControl.height = 32.0; self.segmentedControl.width = 310.0; self.segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar; self.segmentedControl.tintColor = [UIColor colorWithWhite:0.9 alpha:1.0]; self.segmentedControl.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin; UIView* toolbar = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.width, HEADER_HEIGHT)]; toolbar.autoresizingMask = UIViewAutoresizingFlexibleWidth; CAGradientLayer *gradient = [CAGradientLayer layer]; gradient.frame = CGRectMake( toolbar.bounds.origin.x, toolbar.bounds.origin.y, // * 2 for enough slack when iPad rotates toolbar.bounds.size.width * 2, toolbar.bounds.size.height ); gradient.colors = [NSArray arrayWithObjects: (id)[[UIColor whiteColor] CGColor], (id)[[UIColor colorWithWhite:0.8 alpha:1.0 ] CGColor ], nil ]; [toolbar.layer insertSublayer:gradient atIndex:0]; toolbar.backgroundColor = [UIColor navigationBarShadowColor]; [toolbar addSubview:self.segmentedControl]; UIView* border = [[UIView alloc] initWithFrame:CGRectMake(0, HEADER_HEIGHT - 1, toolbar.width, 1)]; border.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin; border.backgroundColor = [UIColor colorWithWhite:0.7 alpha:1.0]; border.autoresizingMask = UIViewAutoresizingFlexibleWidth; [toolbar addSubview:border]; [self.segmentedControl centerInParent]; self.tableView.tableHeaderView = toolbar; </code></pre> <p><p><a href="http://beta.vidopop.com/v/bqung5">http://scs.veetle.com/soget/session-thumbnails/5363e222d2e10/86a8dd984fcaddee339dd881544ecac7/5363e222d2e10_86a8dd984fcaddee339dd881544ecac7_20140509171623_536d6fd78f503_68_896x672.jpg</a></p></p>
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      1. POWhy is the top portion of my UISegmentedControl not tappable?
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    1. COWhat value is HEADER_HEIGHT (presume it is a macro or constant)? Where is this code invoked from - viewDidLoad?
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      1. POWhy is the top portion of my UISegmentedControl not tappable?
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    2. CO`HEADER_HEIGHT = 42.0;` The code is invoked in `viewDidLoad` after `[super viewDidLoad]`. I use a `UIView+Position` category which has convenience properties such as x, y, width, height, and centerInParent.
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      1. POWhy is the top portion of my UISegmentedControl not tappable?
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    3. COThis might help http://stackoverflow.com/a/9719364/488611. The navigation bars touch area extends below to make it easier to tap.
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      1. POWhy is the top portion of my UISegmentedControl not tappable?
      1. USJames P
 

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