Swift :How to create dynamic layout from json response iOS

Question

I want to create dynamic layout according to json response getting from server. I'm confused between methodology using views with constraints or using tableview to achieve this layout. I have researched another approach is that make the different kinds of xib views, after parsing the response, checked every element type and call the respective view in tableview cell. I just want a suggestion how can i create this layout in better way.

The json response is:

 "data": {
  "elementperrowtwo": {
    [
      {
        “fieldid”: “1”,
        “fieldtype”: “label”,
        “fieldtext”: “OrderDate”,
        “fieldcontrolno”: ”1”,
        “displaycolumntype”: “2”
      },
      {
        “fieldid”: “2”,
        “fieldtype”: “textfield”,
        “fieldtext”: “”,
        “fieldcontrolno”: ”2”,
        “displaycolumntype”: “2”
      },
      {
        “fieldid”: “3”,
        “fieldtype”: “label”,
        “fieldtext”: “OurReference”,
        “fieldcontrolno”: ”1”,
        “displaycolumntype”: “2”
      },
      {
        “fieldid”: “4”,
        “fieldtype”: “textfield”,
        “fieldtext”: “”,
        “fieldcontrolno”: ”2”,
        “displaycolumntype”: “2”
      }
    ],
    "elementperrowone": [
      {
        “fieldid”: “8”,
        “fieldtype”: “label”,
        “fieldtext”: “Buyer”,
        “fieldcontrolno”: ”1”,
        “displaycolumntype”: “1”
      },
      {
        “fieldid”: “9”,
        “fieldtype”: “textfield”,
        “fieldtext”: “”,
        “fieldcontrolno”: ”2”,
        “displaycolumntype”: “1”
      },
      {
        “fieldid”: “16”,
        “fieldtype”: “dropdown”,
        “fieldarray”: [
          {
            “id”: “1”,
            “name”: “australia”
          },
          {
            “id”: “2”,
            “name”: “china”
          },
          {
            “id”: “3”,
            “name”: “India”
          }
        ],
        “fieldcontrolno”: ”3”,
        “displaycolumntype”: “1”
      }
    ]
  }

Nisarg Shah · Accepted Answer · 2020-03-11 10:52:20Z

4

The best approach for achieving dynamic layout is using a stack view. Using xib you can init the view and add it as arranged subview inside the stackview.

First, you need to create an extension function so that you can reuse it.

extension UIView {

    func loadFromNib() {
        Bundle.main.loadNibNamed(String(describing: type(of: self)), owner: self, options: nil)
    }
}

After designing xib all you need is to init view from xib to use it. Bellow is code for initializing view from xib.

class FormLabelFieldCell: UIView {
    @IBOutlet weak var contentView: UIView!
    @IBOutlet weak var lblTitle: UILabel!

    override init(frame: CGRect) {
        super.init(frame: frame)
        commonInit()
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)
        commonInit()
    }

    func commonInit() {
        loadFromNib()
        addSubview(contentView)
        contentView.frame = self.bounds
        contentView.autoresizingMask = [.flexibleWidth,.flexibleHeight]
    }

}

You can add this as a subview as

let cell = FormLabelFieldCell()
mainStack.addArrangedSubview(cell.contentView)

answered Mar 11, 2020 at 10:52

Nisarg Shah

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3 Comments

Chetan Lodhi Over a year ago

Thanks for your suggestion @Nisarg Shah. I followed what you suggested and I got positive result. Cheers...

Chetan Lodhi Over a year ago

Ya of course. I've one query I want create single textfield and double text in single row according to requirement. So which approach should I use to create it. Should I create two xib for both and then draw according to single/double textfield?

Nisarg Shah Over a year ago

@ChetanLodhi if you are enough aware of auto layout then you should go for single xib. if you are don't need any further headaches for design changes you should go with different xib.

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