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                            # .getContext

### RenderingContext Canvas.getContext(string contextType, Object contextAttributes)

獲取畫布對象的繪圖上下文

#### 參數

##### string contextType

上下文類型

**contextType 的合法值**

值說明2d2d 繪圖上下文webglwebgl 繪圖上下文##### Object contextAttributes

webgl 上下文屬性，僅當 contextType 為 webgl 時有效

屬性類型默認值是否必填說明支持版本antialiasbooleanfalse否表示是否抗鋸齒preserveDrawingBufferbooleanfalse否表示是否繪圖完成后是否保留繪圖緩沖區antialiasSamplesnumber2否抗鋸齒樣本數。最小值為 2，最大不超過系統限制數量，僅 iOS 支持#### 返回值

##### RenderingContext

繪圖上下文

> 原文: <https://developers.weixin.qq.com/minigame/dev/api/render/canvas/Canvas.getContext.html>
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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