如何使用动态JSON数据设置numberOfSectionsInTableView，titleForHeaderInSection [英] How to set numberOfSectionsInTableView, titleForHeaderInSection using dynamic json data

问题描述

我在下面提供了一些json数据，我想将其显示在表格标题中的表格中，这些表格的标题分别是Departments，Designing，Employees，Development，Employees.

I have some json data given below and I want to display it in a table where the section headers are Departments, Designing, Employees, Developing, Employees.

我在numberOfSectionsInTableView，titleForHeaderInSection中使用了静态数据，但我想使用动态数据来实现.

I used static data in numberOfSectionsInTableView, titleForHeaderInSection but I want to do it using dynamic data.

我该怎么做?

{                                                                                                                                                                          
    "Departments":[
        {
            "name":"Designing",
            "id":"1.1",
            "Employees":[
                {
                    "name":"Ramesh",
                    "id":"1.1.1",
                    "salary":"4lakhs"
                },
                {
                    "name":"Suresh",
                    "id":"1.1.2",
                    "salary":"4lakhs"
                }
            ]
        },
        {
            "name":"Developing",
            "id":"1.2",
            "Employees":[
                {
                    "name":"Ram",
                    "id":"1.2.1",
                    "salary":"4lakhs"
                },
                {
                    "name":"Sam",
                    "id":"1.2.2",
                    "salary":"4lakhs"
                }
           ]
      }
}

推荐答案

首先，您必须根据指定的字符串JSON对象创建一个NSDictionary.

first you have to create a NSDictionary from the string JSON object you specified.

    NSDictionary *myDict = [NSJSONSerialization JSONObjectWithData:webData options:nil error:NULL];

然后在表视图中委派方法:

Then in the table view delegate methods:

    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
    {
        return [[myDict valueForKey:@"Departments"] count];
    }

    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
        return [[[[myDict valueForKey:@"Departments"] objectAtIndex:section] valueForKey:@"Employees"] count];
    }

    - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
    {
        return [[[myDict valueForKey:@"Departments"] objectAtIndex:section] valueForKey:@"name"];
    }

或者至少我会尝试这样设置它们.

Or at least I would try to set them like this.

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