Arc of basic graphics for iOS drawing
Last Update:2016-01-22
Source: Internet
Author: User
<span id="Label3"></p><pre><span style="color: #008080;"><span style="color: #008080;">1</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">drawing Arcs</span></span><span style="color: #008080;"><span style="color: #008080;">2</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">1. Get Context</span></span><span style="color: #008080;"><span style="color: #008080;">3</span></span>Cgcontextref CTX =<span style="color: #000000;"><span style="color: #000000;">Uigraphicsgetcurrentcontext ();</span></span><span style="color: #008080;"><span style="color: #008080;">4</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">2. Draw Arcs</span></span><span style="color: #008080;"><span style="color: #008080;">5</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">x/y Center</span></span><span style="color: #008080;"><span style="color: #008080;">6</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">radius radius</span></span><span style="color: #008080;"><span style="color: #008080;">7</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">StartAngle The beginning of the arc</span></span><span style="color: #008080;"><span style="color: #008080;">8</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Endangle end of Arc</span></span><span style="color: #008080;"><span style="color: #008080;">9</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">clockwise draw the direction of the arc (0 clockwise, 1 Counterclockwise)</span></span><span style="color: #008080;"><span style="color: #008080;">Ten</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">cgcontextaddarc (ctx,-m_pi_2, m_pi_2, 0);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> one</span>Cgcontextaddarc (ctx,<span style="color: #800080;"><span style="color: #800080;"></span> -</span>,<span style="color: #800080;"><span style="color: #800080;"></span> -</span>,<span style="color: #800080;"><span style="color: #800080;"></span> -</span>, m_pi_2, m_pi,<span style="color: #800080;"><span style="color: #800080;">0</span></span><span style="color: #000000;"><span style="color: #000000;">);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span> <span style="color: #000000;"><span style="color: #000000;">Cgcontextclosepath (ctx);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">3. Rendering</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Cgcontextstrokepath (ctx);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Cgcontextfillpath (ctx);</pre><p><p></p></p><p><p>Arc of basic graphics for iOS drawing</p></p></span>
