在iOS中使用JSON数据创建动态表单Objective-C

问题描述：

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，并获得了不同控件（如Textfield，TextView，下拉列表和开关）的数据，但不知道如何在窗体视图中动态添加字段。任何帮助将非常感激。谢谢！在iOS中使用JSON数据创建动态表单Objective-C

{ 
"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": "" 
    },

答

你需要比这更多，但这里是一个开始，让你在正确的方向。

一个非常简单的方法可能如下所示：

在视图控制器添加一个数组来跟踪你的输入字段。

@interface ViewController() 

@property (strong, nonatomic) NSMutableArray *fields; 

@end

在您的视图控制器的viewDidLoad（或其它适当的地方）中添加环来创建和每个元素添加到视图控制器的视图。

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 
}

您当然也需要获取用户输入的字段数据。一个简单的方法是将每个字段添加到可以稍后读取的数组中。

要访问用户数据，只需循环访问它们即可。

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 
}

。 – Mukesh

我设计了窗体，但是有问题从所有字段获取数据。任何帮助将不胜感激。 – Mukesh

我想你的意思是获取用户输入的数据？在那种情况下，你如何*想要*检索数据？有很多可能性，所以第一步是了解用户输入数据后要处理的数据。一旦你知道了，你可以（例如）创建一个字典，在你创建它时存储每个字段。从那里你可以在用户完成后再次访问它。 – LGP

答

首先你需要确定JSON对象，所以你确定你需要的UILabel，的UITextField等...
集所有的标志在JSON响应类似动态字段可编辑与否。
一定是你的JSON数据结构固定

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

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

读一个问题显然，这不是一个问题的答案给了我很多东西值得思考的问题 – karthikeyan

在iOS中使用JSON数据创建动态表单Objective-C

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