对象数组的定义如下：

type: array
items:
  type: object
  properties:
    prop1:
      type: string
    prop2:
      type: integer
    # etc.

在您的示例中，响应包含一个具有balanceDisplaySettings属性的对象，而此属性包含一个对象数组。这可以定义如下：

paths:
  /Path:
    get:
      responses:
        200:
          description: OK
          schema:
            type: object
            properties:
              balanceDisplaySettings:
                type: array
                items:
                  type: object
                  properties:
                    type:
                      type: string
                    label: 
                      type: string
                    visible:
                      type: boolean
                    primary:
                      type: boolean

请注意，模式定义了response structure，这意味着您不需要在任何地方指定实际值（"Balance"、"AvailableBalance"等）。但是，如果您希望将帖子中的示例（包含2个对象的数组）显示为Swagger UI中的示例，则可以如下添加：

balanceDisplaySettings:
                type: array
                items:
                  type: object
                  properties:
                    type:
                      type: string
                    label: 
                      type: string
                    visible:
                      type: boolean
                    primary:
                      type: boolean
                example:            # <-- example of array of 2 objects
                  - type: Balance
                    label: Current
                    visible: true
                    primary: false
                  - type: AvailableBalance
                    label: Available
                    visible: true
                    primary: true

最后，您可能希望拆分内联嵌套架构，以使规范更加模块化。

paths:
  /Path:
    get:
      responses:
        200:
          description: OK
          schema:
            $ref: '#/definitions/MyResponseObject'
                                    #   |
definitions:                        #   |
  # TODO: better name               #   |
  MyResponseObject:    # <--------------+
    type: object
    properties:
      balanceDisplaySettings:
        type: array
        items:
          $ref: '#/definitions/BalanceDisplaySetting'
        example:                     #  |
          - type: Balance            #  |
            label: Current           #  |
            visible: true            #  |
            primary: false           #  |
          - type: AvailableBalance   #  |
            label: Available         #  |
            visible: true            #  |
            primary: true            #  |
                                     #  |
  BalanceDisplaySetting:     # <--------+
    type: object
    properties:
      type:
        type: string
        example: Balance
      label:
        type: string
        example: Current
      visible:
        type: boolean
      boolean:
        type: boolean

另一个解决方案是oneOF参数，通过它，您可以根据需要使用多个匿名对象。
只需创建一些定义并在items中调用它们：

"type": "array",
"items": {
  "oneOf": [
    { "$ref": "#/components/schemas/Schema1" },
    { "$ref": "#/components/schemas/Schema2" }
  ]
}

您可以在此处阅读更多信息：
https://community.smartbear.com/t5/Swagger-Open-Source-Tools/Can-You-Define-a-Response-Consisting-of-an-Array-With-Two/td-p/186919
希望能有所帮助