如何在Swift 3.0的uitableviewcell中合并两个结构并打印两个结构的值

Question

Below are my two structs, and I want to print values from both structs in UITableViewCell

struct MainCell: Decodable
{
    let job_id: String
    let job_desig: String
    let job_desc: String
    let job_location: String
    let job_emp_gender: String
    let job_skills: String
    let company_id: Int

}
struct Company: Decodable{
    let company_id: Int
    let company_name: String
}

var mainCellData = [MainCell]()
var companyData = [Company]()

- TableView Methods

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
    {
        return mainCellData.count + companyData.count
    }

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
    {
        let cell:JobDetails_TableViewCell = tableView.dequeueReusableCell(withIdentifier: "jobCell") as! JobDetails_TableViewCell

        for jobs in mainCellData {
            cell.lblDesig.text = jobs.job_desig
            cell.lblDesc.text = jobs.job_desc
            cell.lblLocation.text = jobs.job_location
            cell.comName.text = jobs.name.company_name
        }

        return cell
    }

As I want to print job_desig, job_desc and job_location from my first struct (struct MainCell: Decodable) and company_name from my second struct (struct Company: Decodable)

Can anybody help me with my issue?

Answer 1

1. Your numberOfRowsInSection doesn't match your requirement.
2. Get rid of the for loop in cellForRowAt .
3. You don't need to merge anything. You need to look up the company name based on its id.

Your code should look like this:

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return mainCellData.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell:JobDetails_TableViewCell = tableView.dequeueReusableCell(withIdentifier: "jobCell") as! JobDetails_TableViewCell

    let data = mainCellData[indexPath.row]
    cell.lblDesig.text = data.job_desig
    cell.lblDesc.text = data.job_desc
    cell.lblLocation.text = data.job_location
    cell.comName.text = companyData.first { $0.company_id == data.company_id }?.company_name

    return cell
}

The real trick is getting the company name. The idea is that you have data.company_id which is of course the company_id for the row being displayed. You need to iterate through the companyData array and find a Company that has the same company_id . When a match is found, get the company_name from that matching company.

The code companyData.first { $0.company_id == data.company_id }?.company_name means:

Iterate through the companyData array and find the first entry where the company_id equals data.company_id . If a match is found, return its company_name .

Answer 2

You don't need to add count for numberOfRow, It is not good practice to manage two array for tableview you should combine in one struct like below
You can create one struct to maintain your all datasource

struct MainStruct {

    var mainCellData :MainCell
    var companyData :Company?

}

EDIT

and fill your data source like this in viewDidLoad or whenever you got your array

var data = [MainStruct]()
for object in mainCellData {
   let obj = companyData.first{$0.company_id == object.company_id }
    data.append(MainStruct(mainCellData: object, companyData: obj))
}

Now

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return data.count
}

and

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell:JobDetails_TableViewCell = tableView.dequeueReusableCell(withIdentifier: "jobCell") as! JobDetails_TableViewCell

    let data = data[indexPath.row]
    cell.lblDesig.text = data.mainCellData.job_desig
    cell.lblDesc.text = data.mainCellData.job_desc
    cell.lblLocation.text = data.mainCellData.job_location
    cell.comName.text = data.companyData?.company_name

    return cell
}

Hope it is helpful