arcgis for js 文字描边
var font = new Font("12pt");
font.setFamily("Arial");
font.setWeight(Font.WEIGHT_BOLD);
font.setDecoration("none");
font.setStyle(Font.STYLE_NORMAL);
var symbol = new TextSymbol(this.textInput.value);
symbol.setAlign(TextSymbol.ALIGN_MIDDLE);
symbol.setColor(new Color("#2A506F"));
symbol.setFont(font);
symbol.setText("你好。");
symbol.setHaloColor(new Color([255, 255, 255, 1])); //
symbol.setHaloSize(1); //
symbol.setAngle(angle);