如果对一个值可以包含多个，那么可以使用枚举，加上Flags
本文告诉大家如何写一个 Flags。
在写前，需要知道一些基础知识，取反、或、与，如果不知道的话，请去看看基础。
当然，这些太复杂了，我也不会在这里解释。
假如有类型
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[Flags] <span class="hljs-keyword">public</span> <span class="hljs-keyword">enum</span> Show { A = <span class="hljs-number">0x00000001</span>, B = <span class="hljs-number">0x00000010</span>, C = <span class="hljs-number">0x00000100</span>, D = <span class="hljs-number">0x00001000</span>, } |
合并多个，使用 |
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<span class="hljs-operator"><span class="hljs-keyword">Show</span> <span class="hljs-keyword">show</span>=<span class="hljs-keyword">Show</span>.A | <span class="hljs-keyword">Show</span>.B</span> |
一个简单方法是用 HasFlag，但是一个方法是用 &
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<span class="hljs-operator"><span class="hljs-keyword">Show</span> <span class="hljs-keyword">show</span>=<span class="hljs-keyword">Show</span>.A | <span class="hljs-keyword">Show</span>.B;</span> <span class="hljs-operator"><span class="hljs-keyword">show</span>.HasFlag(<span class="hljs-keyword">Show</span>.A);</span> //其他 bool 包含=(<span class="hljs-operator"><span class="hljs-keyword">show</span> & <span class="hljs-keyword">Show</span>.A)!=<span class="hljs-number">0</span>;</span> |
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<span class="hljs-operator"><span class="hljs-keyword">Show</span> <span class="hljs-keyword">show</span>=<span class="hljs-keyword">Show</span>.A | <span class="hljs-keyword">Show</span>.B;</span> <span class="hljs-operator"><span class="hljs-keyword">show</span>=<span class="hljs-keyword">show</span> & (~<span class="hljs-keyword">Show</span>.A);</span> |
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<span class="hljs-operator"><span class="hljs-keyword">Show</span> <span class="hljs-keyword">show</span>=<span class="hljs-keyword">Show</span>.A | <span class="hljs-keyword">Show</span>.B;</span> bool 包含=(<span class="hljs-operator"><span class="hljs-keyword">show</span> & <span class="hljs-keyword">Show</span>.A)!=<span class="hljs-number">0</span>;</span> if(包含) { <span class="hljs-operator"><span class="hljs-keyword">show</span>=<span class="hljs-keyword">show</span> & (~<span class="hljs-keyword">Show</span>.A);</span> } else { <span class="hljs-operator"><span class="hljs-keyword">show</span>=<span class="hljs-keyword">show</span> | <span class="hljs-keyword">Show</span>.A;</span> } |