Question 69360 in IOS Swift Question posted in
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Need to get a logic for implementing the tableview sections according to array count – Ios swift

My scenario is that I have three different types of arrays that might or might not contain values. I have 3 sections with section headers for my tableview. I am having trouble finding a solution that would be to dynamically set the sections i.e, if one of my arrays doesn’t have a value then I don’t want to show the section. If 3 arrays have value then show the 3 sections or if any one of the arrays doesn’t have value then I don’t want to show that section.

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4

Answers


  1. 0

    Your numberOfSections will be the number of arrays. And the numberOfRowsInSection will be the count of each arrays for that section in your tableViewDataSource.

    func numberOfSections(in tableView: UITableView) -> Int {
    
    return 3
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    
    if section == 0 {
        return array1.count
    } else if section == 1 {
        return array2.count
    } else {
        return array3.count
    }
    
}

    If there are no items in an array, then the rows will be zero for that section.

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  2. 0

    You can do something like this

    // Create enum for simplifying the implementation.

enum SectionType{
case type1
case type2
case type3
}

class TestVC: UIViewController {
// create to show sections only when data is available
var sections: [SectionType] = []
// create you array types
var array1 = [String]()
var array2 = [String]()
var array3 = [String]()
@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()
    
    tableView.dataSource = self
    // Add enums to section only when array has some value
    // You can do this when you get API data
    if array1.count > 0{
        sections.append(.type1)
    }
    if array2.count > 0{
        sections.append(.type2)
    }
    if array3.count > 0{
        sections.append(.type3)
    }
}

}
extension TestVC: UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
    // only those sections with data wil be visible
    return sections.count
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    
    switch sections[section]{
        
    case .type1:
        return array1.count
    case .type2:
        return array2.count
    case .type3:
        return array3.count
        
    }
    
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    switch sections[indexPath.section]{
        // return different type of cells if required accourding to the data in array
    case .type1, .type2, .type3:
        return UITableViewCell()
    

    }

}
  }
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  3. 0

    If the arrays can change dynamically (after the view is loaded), you can implement number of sections like that:

    func numberOfSections(in tableView: UITableView) -> Int {
  var numberOfSections = 0
  if array1.count > 0 { numberOfSections++ }
  if array2.count > 0 { numberOfSections++ }
  if array3.count > 0 { numberOfSections++ }
  return numberOfSections 
}
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  4. 0

    Your data source should look like this – sectionModels = [[cellModels]]
    The outer array represents number of sections and inner array represents number of cells in that section.

    func numberOfSections(in tableView: UITableView) -> Int {
    return sectionModels.count
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return sectionModels[section].count            
}
    
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cellModel = sectionModels[indexPath.section][indexPath.row]
    // Configure UITableViewCell with cellModel
    }
}
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