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<p style="margin: 0px; line-height: normal; font-family: '.SF UI Text'; color: rgb(69, 69, 69);">
<span style="color: rgb(36, 39, 41); font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 15px; -webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);">Hello All. </span></p>
<p style="margin: 0px; line-height: normal; font-family: '.SF UI Text'; color: rgb(69, 69, 69);">
<span style="color: rgb(36, 39, 41); font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 15px; -webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);">I'm trying to use Core Graphics to draw to a UIView. I'm purposely avoiding
using UIKit drawing methods for UIView because I'd like to go deeper into drawing: i have a button whose push down implementation in the View Controller is:</span></p>
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<span style="color: rgb(36, 39, 41); font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 15px; -webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);"><br>
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<pre class="default prettyprint prettyprinted" style="margin-top: 0px; margin-bottom: 1em; padding: 5px; border: 0px; font-size: 13px; width: auto; max-height: 600px; overflow: auto; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; background-color: rgb(239, 240, 241); color: rgb(57, 51, 24); word-wrap: normal; -webkit-text-size-adjust: auto;"><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">let</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> colorSpace </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">CGColorSpaceCreateDeviceRGB</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">()</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
a </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">CGContext</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">data</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">nil</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> width</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">100</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> height</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">100</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> bitsPerComponent</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">8</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> bytesPerRow</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> space</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> colorSpace</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> bitmapInfo</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">CGImageAlphaInfo</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">premultipliedLast</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">rawValue</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">);</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
a</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">?.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">setFillColor</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">red</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">1.0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> green</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0.0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> blue</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0.0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> alpha</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0.0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">);</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
a</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">?.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">fill</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">CGRect</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">x</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> y</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> width</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">100</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> height</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">100</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">));</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">let</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> i </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> a</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">?.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">makeImage</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">();</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">UIGraphicsPushContext</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">a</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">!);</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">let</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> v1 </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">DGView</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">frame</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">CGRect</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">x</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> y</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> width</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">500</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> height</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">550</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">));</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
v1</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">tag </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">100</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">;</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
v1</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">image </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">UIImage</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">cgImage</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> i</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">!);</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">self</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">view</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">addSubview</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">v1</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">);</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">self</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">view</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">viewWithTag</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">100</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">)?.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">backgroundColor </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">UIColor</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">white</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">;</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span></code></pre>
<div><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
<pre class="default prettyprint prettyprinted" style="margin-top: 0px; margin-bottom: 1em; padding: 5px; border: 0px; font-size: 13px; width: auto; max-height: 600px; overflow: auto; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; background-color: rgb(239, 240, 241); color: rgb(57, 51, 24); word-wrap: normal; -webkit-text-size-adjust: auto;"><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">when</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> i push the button</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> a </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">UIView</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> subclass </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">DGView</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> pops up </span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">with</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> white
background</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">in</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> the draw method of </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">DGView</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> I added </span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">this</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> code</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span></code></pre>
<div><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
<pre class="default prettyprint prettyprinted" style="margin-top: 0px; margin-bottom: 1em; padding: 5px; border: 0px; font-size: 13px; width: auto; max-height: 600px; overflow: auto; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; background-color: rgb(239, 240, 241); color: rgb(57, 51, 24); word-wrap: normal; -webkit-text-size-adjust: auto;"><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">UIGraphicsPopContext</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">();</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">let</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> c </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">UIGraphicsGetCurrentContext</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">();</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
c</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">?.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">draw</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">((</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">c</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">?.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">makeImage</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">())!,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(16, 16, 148);">in</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">CGRect</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">x</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> y</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> width</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> </span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">100</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"> height</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">:</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">
</span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(125, 39, 39);">100</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);">));</span></code></pre>
<pre class="default prettyprint prettyprinted" style="margin-top: 0px; margin-bottom: 1em; padding: 5px; border: 0px; font-size: 13px; width: auto; max-height: 600px; overflow: auto; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; background-color: rgb(239, 240, 241); color: rgb(57, 51, 24); word-wrap: normal; -webkit-text-size-adjust: auto;"><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"><br></span></code></pre>
<pre class="default prettyprint prettyprinted" style="margin-top: 0px; margin-bottom: 1em; padding: 5px; border: 0px; font-size: 13px; width: auto; max-height: 600px; overflow: auto; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; background-color: rgb(239, 240, 241); color: rgb(57, 51, 24); word-wrap: normal; -webkit-text-size-adjust: auto;"><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(48, 51, 54);"><span style="color: rgb(36, 39, 41); font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 15px; white-space: normal; background-color: rgb(255, 255, 255);">The problem is nothing is being drawn. Output should've been a red rectangle. I would really appreciate some guidance on this. Thanks.</span></span></code></pre>
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