edit canvas doc

Signed-off-by: Nyaoyuchi <yaoyuchi@huawei.com>

zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-canvas.md

@@ -78,7 +78,7 @@ Canvas\(context: CanvasRenderingContext2D\)
 @Entry
 @Component
 struct CanvasExample {
-  private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+  private settings: RenderingContextSettings = new RenderingContextSettings(true)
   private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
 
   build() {

zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-canvasgradient.md

@@ -56,9 +56,8 @@ addColorStop\(offset: number, color: string\): void
     @Entry
     @Component
     struct Page45 {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
-      private gra:CanvasGradient = new CanvasGradient()
     
       build() {
         Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
@@ -68,9 +67,9 @@ addColorStop\(offset: number, color: string\): void
             .backgroundColor('#ffff00')
             .onReady(() =>{
               var grad = this.context.createLinearGradient(50,0, 300,100)
-              this.gra.addColorStop(0.0, 'red')
-              this.gra.addColorStop(0.5, 'white')
-              this.gra.addColorStop(1.0, 'green')
+              grad.addColorStop(0.0, 'red')
+              grad.addColorStop(0.5, 'white')
+              grad.addColorStop(1.0, 'green')
               this.context.fillStyle = grad
               this.context.fillRect(0, 0, 500, 500)
             })

zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-imagebitmap.md

@@ -83,7 +83,7 @@ ImageBitmap\(src: string\)
 @Entry
 @Component
 struct DrawImageExample {
-  private settings:RenderingContextSettings = new RenderingContextSettings(true,true)
+  private settings:RenderingContextSettings = new RenderingContextSettings(true)
   private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
   private img:ImageBitmap = new ImageBitmap("common/images/example.jpg")
 

zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-path2d.md

@@ -45,7 +45,7 @@ addPath\(path: Object\): void
     @Entry
     @Component
     struct AddPath {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
     
       private path2Da: Path2D = new Path2D("M250 150 L150 350 L350 350 Z")
@@ -83,7 +83,7 @@ closePath\(\): void
     @Entry
     @Component
     struct ClosePath {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()
     
@@ -161,7 +161,7 @@ moveTo\(x: number, y: number\): void
     @Entry
     @Component
     struct MoveTo {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()
     
@@ -239,7 +239,7 @@ lineTo\(x: number, y: number\): void
     @Entry
     @Component
     struct LineTo {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()
     
@@ -363,7 +363,7 @@ bezierCurveTo\(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number
     @Entry
     @Component
     struct BezierCurveTo {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()
     
@@ -460,7 +460,7 @@ quadraticCurveTo\(cpx: number, cpy: number, x: number ,y: number\): void
     @Entry
     @Component
     struct QuadraticCurveTo {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()
     
@@ -580,7 +580,7 @@ arc\(x: number, y: number, radius: number, startAngle: number, endAngle: number,
     @Entry
     @Component
     struct Arc {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()
     
@@ -687,7 +687,7 @@ arcTo\(x1: number, y1: number, x2: number, y2: number, radius: number\): void
     @Entry
     @Component
     struct ArcTo {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()
     
@@ -827,8 +827,8 @@ ellipse\(x: number, y: number, radiusX: number, radiusY: number, rotation: numbe
     ```
     @Entry
     @Component
-    struct Ellipse {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+    struct CanvasExample {
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()
     
@@ -924,8 +924,8 @@ rect\(x: number, y: number, width: number, height: number\): void
     ```
     @Entry
     @Component
-    struct Rect {
-      private settings: RenderingContextSettings = new RenderingContextSettings(true,true)
+    struct CanvasExample {
+      private settings: RenderingContextSettings = new RenderingContextSettings(true)
       private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
       private path2Db: Path2D = new Path2D()