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PO
 

Note that there are some explanatory texts on larger screens.

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    <p>Switch from use of <code>UIGraphicsBeginImageContext</code> to <code>UIGraphicsBeginImageContextWithOptions</code> (as documented <a href="http://developer.apple.com/library/ios/#documentation/uikit/reference/UIKitFunctionReference/Reference/reference.html" rel="noreferrer">on this page</a>). Pass 0.0 for scale (the third argument) and you'll get a context with a scale factor equal to that of the screen.</p> <p><code>UIGraphicsBeginImageContext</code> uses a fixed scale factor of 1.0, so you're actually getting exactly the same image on an iPhone 4 as on the other iPhones. I'll bet either the iPhone 4 is applying a filter when you implicitly scale it up or just your brain is picking up on it being less sharp than everything around it.</p> <p>So, I guess:</p> <pre><code>#import &lt;QuartzCore/QuartzCore.h&gt; + (UIImage *)imageWithView:(UIView *)view { UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0); [view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage * img = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return img; } </code></pre> <p>And in swift 4:</p> <pre class="lang-swift prettyprint-override"><code>func image(with view: UIView) -&gt; UIImage? { UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.isOpaque, 0.0) defer { UIGraphicsEndImageContext() } if let context = UIGraphicsGetCurrentContext() { view.layer.render(in: context) let image = UIGraphicsGetImageFromCurrentImageContext() return image } return nil } </code></pre>
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    1. POHow to capture UIView to UIImage without loss of quality on retina display
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    1. USLuca Torella
    1. USTommy
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    1. POHow to capture UIView to UIImage without loss of quality on retina display
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    1. COThis works great for me! Thanks.
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      1. USDaniel
    2. COWorked for me as well (sort of), I had to flip the image about the X axis to get it to come out right on a PDF context.
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    3. COThanks for the solution. For 320*480 iDevice, is it possible to implement some codes so that we can get the same good-quality images as if we were capturing it from iPhone 4?
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      1. USWayne Liu
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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