在 iOS Objective-C 中使用 JSON 数据创建动态表单

Question

我需要创建一个关于 JSON 数据值的动态表单。我已经解析了 JSON 数据并获得了具有不同控件（如 Textfield、TextView、下拉列表和 Switch）的数据，但不知道如何在表单视图中动态添加字段。任何帮助将不胜感激。谢谢！

{
"success": true,
"result": {
"label": "Contacts",
"name": "Contacts",
"createable": true,
"updateable": true,
"deleteable": true,
"retrieveable": true,
"fields": [
  {
    "name": "salutationtype",
    "label": "Salutation",
    "mandatory": false,
    "type": {
      "name": "string"
    },
    "nullable": true,
    "editable": true,
    "default": ""
  },
  {
    "name": "firstname",
    "label": "First Name",
    "mandatory": false,
    "type": {
      "name": "string"
    },
    "nullable": true,
    "editable": true,
    "default": ""
  },
  {
    "name": "contact_no",
    "label": "Contact Id",
    "mandatory": false,
    "type": {
      "name": "string"
    },
    "nullable": false,
    "editable": false,
    "default": ""
  },
  {
    "name": "phone",
    "label": "Office Phone",
    "mandatory": false,
    "type": {
      "name": "phone"
    },
    "nullable": true,
    "editable": true,
    "default": ""
  },
  {
    "name": "lastname",
    "label": "Last Name",
    "mandatory": true,
    "type": {
      "name": "string"
    },
    "nullable": false,
    "editable": true,
    "default": ""
  },
  {
    "name": "mobile",
    "label": "Mobile Phone",
    "mandatory": false,
    "type": {
      "name": "phone"
    },
    "nullable": true,
    "editable": true,
    "default": ""
  },
  {
    "name": "account_id",
    "label": "Organization Name",
    "mandatory": false,
    "type": {
      "refersTo": [
        "Accounts"
      ],
      "name": "reference"
    },
    "nullable": true,
    "editable": true,
    "default": ""
  },
  {
    "name": "leadsource",
    "label": "Lead Source",
    "mandatory": false,
    "type": {
      "picklistValues": [
        {
          "label": "Cold Call",
          "value": "Cold Call"
        },
        {
          "label": "Existing Customer",
          "value": "Existing Customer"
        },
        {
          "label": "Self Generated",
          "value": "Self Generated"
        },
        {
          "label": "Employee",
          "value": "Employee"
        },
        {
          "label": "Partner",
          "value": "Partner"
        },
        {
          "label": "Public Relationship",
          "value": "Public Relationship"
        },
        {
          "label": "Direct Mail",
          "value": "Direct Mail"
        },
        {
          "label": "Conference",
          "value": "Conference"
        },
        {
          "label": "Trade Show",
          "value": "Trade Show"
        },
        {
          "label": "Website",
          "value": "Website"
        },
        {
          "label": "Word of Mouth",
          "value": "Word of Mouth"
        },
        {
          "label": "Others",
          "value": "Others"
        }
      ],
      "defaultValue": "Cold Call",
      "name": "picklist"
    },
    "nullable": true,
    "editable": true,
    "default": ""
  },

Answer 1

您需要的远不止这些，但这是一个让您朝着正确方向前进的开始。

非常简单的方法如下所示：

在您的视图控制器中添加一个数组来跟踪您的输入字段。

@interface ViewController ()

@property (strong, nonatomic) NSMutableArray *fields;

@end

在您的视图控制器的 viewDidLoad（或其他适当的位置）中添加一个循环来创建每个元素并将其添加到您的视图控制器的视图中。

self.fields = [NSMutableArray arrayWithCapacity:10]; // Clear and init

CGFloat y = 0.0; // field position
for (NSDictionary *field in jsonData[@"fields"]) {
    // create a label for the field
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10 + y, 100, 20)];
    label.text = field[@"label"];
    [self.view addSubview:label];

    // create the field
    NSString *fieldTypeName = ((NSDictionary *)field[@"type"])[@"name"];
    if ([fieldTypeName isEqualToString:@"string"]) {
        UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(110, 10 + y, 100, 20)];
        [self.view addSubview:textField];

        // Keep track of the fields
        [self.fields addObject:@{ @"data": textField, @"json": field } ];
    } else if ([fieldTypeName isEqualToString:@"picklist"]) {
        // create picklist and add to view
    } // add more field types here...

    y += 25; // move to next field position
}

当然，您还需要获取用户输入的字段数据。一种简单的方法是将每个字段添加到以后可以读取的数组中。

要访问用户数据，您只需遍历它们。

for (NSDictionary *field in self.fields) {
    // Your initial JSON data
    NSDictionary *jsonField = (NSDictionary *)field[@"json"];
    // Your input field
    UITextField *textField = (UITextField *)field[@"data"];
    // User data
    NSString *userData = textField.text;
    // Do something with the data
}

Answer 2

• 首先您需要识别 JSON 对象，以便识别您需要 UILabel、UITextfield 等...
• 在 JSON 响应中设置所有标志，例如动态字段是否可编辑。
• 必须是你的json数据结构修复

其他链接： https://www.codeproject.com/Articles/637408/Updating-UITableView-with-a-dynamic-data-source

https://useyourloaf.com/blog/dynamically-loading-new-rows-into-a-table/