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                # .toTempFilePath ### string Canvas.toTempFilePath(Object object) 將當前 Canvas 保存為一個臨時文件,并生成相應的臨時文件路徑。 #### 參數 ##### Object object 屬性類型默認值是否必填說明支持版本xnumber0否截取 canvas 的左上角橫坐標ynumber0否截取 canvas 的左上角縱坐標widthnumbercanvas 的寬度否截取 canvas 的寬度heightnumbercanvas 的高度否截取 canvas 的高度destWidthnumbercanvas 的寬度否目標文件的寬度,會將截取的部分拉伸或壓縮至該數值destHeightnumbercanvas 的高度否目標文件的高度,會將截取的部分拉伸或壓縮至該數值fileTypestringpng否目標文件的類型qualitynumber1.0否jpg圖片的質量,僅當 fileType 為 jpg 時有效。取值范圍為 0.0(最低)- 1.0(最高),不含 0。不在范圍內時當作 1.0successfunction否接口調用成功的回調函數failfunction否接口調用失敗的回調函數completefunction否接口調用結束的回調函數(調用成功、失敗都會執行)**object.fileType 的合法值** 值說明jpgjpg 文件pngpng 文件#### 返回值 ##### string canvas 生成的臨時文件路徑 #### 示例代碼 Canvas.toTempFilePath ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln">canvas</span><span class="pun">.</span><span class="pln">toTempFilePath</span><span class="pun">({</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> x</span><span class="pun">:</span><span class="pln"> </span><span class="lit">10</span><span class="pun">,</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> y</span><span class="pun">:</span><span class="pln"> </span><span class="lit">10</span><span class="pun">,</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> width</span><span class="pun">:</span><span class="pln"> </span><span class="lit">200</span><span class="pun">,</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> height</span><span class="pun">:</span><span class="pln"> </span><span class="lit">150</span><span class="pun">,</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> destWidth</span><span class="pun">:</span><span class="pln"> </span><span class="lit">400</span><span class="pun">,</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> destHeight</span><span class="pun">:</span><span class="pln"> </span><span class="lit">300</span><span class="pun">,</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> success</span><span class="pun">:</span><span class="pln"> </span><span class="pun">(</span><span class="pln">res</span><span class="pun">)</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="pun">></span><span class="pln"> </span><span class="pun">{</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> wx</span><span class="pun">.</span><span class="pln">shareAppMessage</span><span class="pun">({</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> imageUrl</span><span class="pun">:</span><span class="pln"> res</span><span class="pun">.</span><span class="pln">tempFilePath</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> </span><span class="pun">})</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> </span><span class="pun">}</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pun">})</span></code></li> </ol> ``` Canvas.toTempFilePathSync ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln">let tempFilePath </span><span class="pun">=</span><span class="pln"> canvas</span><span class="pun">.</span><span class="pln">toTempFilePathSync</span><span class="pun">({</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> x</span><span class="pun">:</span><span class="pln"> </span><span class="lit">10</span><span class="pun">,</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> y</span><span class="pun">:</span><span class="pln"> </span><span class="lit">10</span><span class="pun">,</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> width</span><span class="pun">:</span><span class="pln"> </span><span class="lit">200</span><span class="pun">,</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> height</span><span class="pun">:</span><span class="pln"> </span><span class="lit">150</span><span class="pun">,</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> destWidth</span><span class="pun">:</span><span class="pln"> </span><span class="lit">400</span><span class="pun">,</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> destHeight</span><span class="pun">:</span><span class="pln"> </span><span class="lit">300</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pun">})</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln">wx</span><span class="pun">.</span><span class="pln">shareAppMessage</span><span class="pun">({</span></code></li> <li class="l1"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pln"> imageUrl</span><span class="pun">:</span><span class="pln"> tempFilePath</span></code></li> <li class="l"><code class="pcalibre9 pcalibre8 pcalibre7"><span class="pun">})</span></code></li> </ol> ``` > 原文: <https://developers.weixin.qq.com/minigame/dev/api/render/canvas/Canvas.toTempFilePath.html>
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