feat:图片缩略图占位图地址栏添加fx;占位图支持取fx变量

packages/amis-editor/src/plugin/Image.tsx

@@ -84,9 +84,8 @@ export class ImagePlugin extends BasePlugin {
 
               isUnderField
                 ? null
-                : getSchemaTpl('imageUrl', {
+                : getSchemaTpl('formulaControl', {
                     name: 'src',
-                    type: 'input-text',
                     label: '缩略图地址',
                     description: '如果已绑定字段名，可以不用设置，支持用变量。'
                   }),
@@ -119,7 +118,7 @@ export class ImagePlugin extends BasePlugin {
                 hiddenOn: 'this.enlargeAble',
                 clearValueOnHidden: true
               },
-              getSchemaTpl('imageUrl', {
+              getSchemaTpl('formulaControl', {
                 name: 'defaultImage',
                 label: tipedLabel('占位图', '无数据时显示的图片')
               })

packages/amis/src/renderers/Image.tsx

@@ -506,6 +506,11 @@ export class ImageField extends React.Component<ImageFieldProps, object> {
     let value = finnalSrc || getPropValue(this.props);
     const finnalHref = href ? filter(href, data, '| raw') : '';
 
+    const defaultValue = defaultImage
+      ? filter(defaultImage, data, '| raw')
+      : '';
+    let defaultImageValue = defaultValue || getPropValue(this.props);
+
     return (
       <div
         className={cx(
@@ -528,14 +533,14 @@ export class ImageField extends React.Component<ImageFieldProps, object> {
             thumbClassName={thumbClassName}
             height={height}
             width={width}
-            src={value ? value : defaultImage}
+            src={value ? value : defaultImageValue}
             href={finnalHref}
             title={filter(title, data)}
             caption={filter(imageCaption, data)}
             thumbMode={thumbMode}
             thumbRatio={thumbRatio}
             originalSrc={filter(originalSrc, data, '| raw') ?? value}
-            enlargeAble={enlargeAble && value !== defaultImage}
+            enlargeAble={enlargeAble && value !== defaultImageValue}
             onEnlarge={this.handleEnlarge}
             imageMode={imageMode}
             imageControlClassName={imageControlClassName}