catch items in a cart</title>
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<tr><td class='sub'>An iOS game where you catch items in a cart</td><td class='sub right'></td></tr></table>
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<td class='lines'><pre><code><style>pre { line-height: 125%; }
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span><span class="cm">/*</span>
<span class="cm"> * cocos2d for iPhone: http://www.cocos2d-iphone.org</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright 2009 lhunath (Maarten Billemont)</span>
<span class="cm"> *</span>
<span class="cm"> * Permission is hereby granted, free of charge, to any person obtaining a copy</span>
<span class="cm"> * of this software and associated documentation files (the &quot;Software&quot;), to deal</span>
<span class="cm"> * in the Software without restriction, including without limitation the rights</span>
<span class="cm"> * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell</span>
<span class="cm"> * copies of the Software, and to permit persons to whom the Software is</span>
<span class="cm"> * furnished to do so, subject to the following conditions:</span>
<span class="cm"> * </span>
<span class="cm"> * The above copyright notice and this permission notice shall be included in</span>
<span class="cm"> * all copies or substantial portions of the Software.</span>
<span class="cm"> * </span>
<span class="cm"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span>
<span class="cm"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span>
<span class="cm"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span>
<span class="cm"> * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span>
<span class="cm"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</span>
<span class="cm"> * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN</span>
<span class="cm"> * THE SOFTWARE.</span>
<span class="cm"> *</span>
<span class="cm"> */</span><span class="w"></span>

<span class="cp">#import &quot;CCActionTween.h&quot;</span>


<span class="k">@implementation</span> <span class="nc">CCActionTween</span><span class="w"></span>

<span class="p">+</span> <span class="p">(</span><span class="kt">id</span><span class="p">)</span><span class="nf">actionWithDuration:</span><span class="p">(</span><span class="n">ccTime</span><span class="p">)</span><span class="nv">aDuration</span><span class="w"> </span><span class="nf">key:</span><span class="p">(</span><span class="bp">NSString</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="nv">aKey</span><span class="w"> </span><span class="nf">from:</span><span class="p">(</span><span class="kt">float</span><span class="p">)</span><span class="nv">aFrom</span><span class="w"> </span><span class="nf">to:</span><span class="p">(</span><span class="kt">float</span><span class="p">)</span><span class="nv">aTo</span><span class="w"> </span><span class="p">{</span><span class="w"></span>

<span class="w">	</span><span class="k">return</span><span class="w"> </span><span class="p">[[[[</span><span class="nb">self</span><span class="w"> </span><span class="k">class</span><span class="p">]</span><span class="w"> </span><span class="n">alloc</span><span class="p">]</span><span class="w"> </span><span class="n">initWithDuration</span><span class="o">:</span><span class="n">aDuration</span><span class="w"> </span><span class="n">key</span><span class="o">:</span><span class="n">aKey</span><span class="w"> </span><span class="n">from</span><span class="o">:</span><span class="n">aFrom</span><span class="w"> </span><span class="n">to</span><span class="o">:</span><span class="n">aTo</span><span class="p">]</span><span class="w"> </span><span class="n">autorelease</span><span class="p">];</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>

<span class="p">-</span> <span class="p">(</span><span class="kt">id</span><span class="p">)</span><span class="nf">initWithDuration:</span><span class="p">(</span><span class="n">ccTime</span><span class="p">)</span><span class="nv">aDuration</span><span class="w"> </span><span class="nf">key:</span><span class="p">(</span><span class="bp">NSString</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="nv">key</span><span class="w"> </span><span class="nf">from:</span><span class="p">(</span><span class="kt">float</span><span class="p">)</span><span class="nv">from</span><span class="w"> </span><span class="nf">to:</span><span class="p">(</span><span class="kt">float</span><span class="p">)</span><span class="nv">to</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
<span class="w">    </span>
<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="nb">self</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[</span><span class="nb">super</span><span class="w"> </span><span class="n">initWithDuration</span><span class="o">:</span><span class="n">aDuration</span><span class="p">]))</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
<span class="w">    </span>
<span class="w">		</span><span class="n">key_</span><span class="w">	</span><span class="o">=</span><span class="w"> </span><span class="p">[</span><span class="n">key</span><span class="w"> </span><span class="k">copy</span><span class="p">];</span><span class="w"></span>
<span class="w">		</span><span class="n">to_</span><span class="w">		</span><span class="o">=</span><span class="w"> </span><span class="n">to</span><span class="p">;</span><span class="w"></span>
<span class="w">		</span><span class="n">from_</span><span class="w">	</span><span class="o">=</span><span class="w"> </span><span class="n">from</span><span class="p">;</span><span class="w"></span>

<span class="w">	</span><span class="p">}</span><span class="w"></span>
<span class="w">    </span>
<span class="w">	</span><span class="k">return</span><span class="w"> </span><span class="nb">self</span><span class="p">;</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>

<span class="p">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span> <span class="nf">dealloc</span><span class="w"></span>
<span class="p">{</span><span class="w"></span>
<span class="w">	</span><span class="p">[</span><span class="n">key_</span><span class="w"> </span><span class="k">release</span><span class="p">];</span><span class="w"></span>
<span class="w">	</span><span class="p">[</span><span class="nb">super</span><span class="w"> </span><span class="n">dealloc</span><span class="p">];</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>

<span class="p">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="nf">startWithTarget:</span><span class="n">aTarget</span><span class="w"></span>
<span class="p">{</span><span class="w"></span>
<span class="w">	</span><span class="p">[</span><span class="nb">super</span><span class="w"> </span><span class="n">startWithTarget</span><span class="o">:</span><span class="n">aTarget</span><span class="p">];</span><span class="w"></span>
<span class="w">	</span><span class="n">delta_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">to_</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="n">from_</span><span class="p">;</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>

<span class="o">-</span><span class="w"> </span><span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="w"> </span><span class="n">update</span><span class="o">:</span><span class="p">(</span><span class="n">ccTime</span><span class="p">)</span><span class="w"> </span><span class="n">dt</span><span class="w"></span>
<span class="p">{</span><span class="w">    </span>
<span class="w">	</span><span class="p">[</span><span class="n">target_</span><span class="w"> </span><span class="n">setValue</span><span class="o">:</span><span class="p">[</span><span class="bp">NSNumber</span><span class="w"> </span><span class="n">numberWithFloat</span><span class="o">:</span><span class="n">to_</span><span class="w">  </span><span class="o">-</span><span class="w"> </span><span class="n">delta_</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="n">dt</span><span class="p">)]</span><span class="w"> </span><span class="n">forKey</span><span class="o">:</span><span class="n">key_</span><span class="p">];</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>

<span class="o">-</span><span class="w"> </span><span class="p">(</span><span class="n">CCActionInterval</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="n">reverse</span><span class="w"></span>
<span class="p">{</span><span class="w"></span>
<span class="w">	</span><span class="k">return</span><span class="w"> </span><span class="p">[[</span><span class="nb">self</span><span class="w"> </span><span class="k">class</span><span class="p">]</span><span class="w"> </span><span class="n">actionWithDuration</span><span class="o">:</span><span class="n">duration_</span><span class="w"> </span><span class="n">key</span><span class="o">:</span><span class="n">key_</span><span class="w"> </span><span class="n">from</span><span class="o">:</span><span class="n">to_</span><span class="w"> </span><span class="n">to</span><span class="o">:</span><span class="n">from_</span><span class="p">];</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>


<span class="k">@end</span><span class="w"></span>
</pre></div>
</code></pre></td></tr></table>
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