iOS UI PickerView

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  Keywords : iOS uipickerview example in swift using xcode, How to use ios ui pickerview in swift with example using xcode, iOS uipickerview to select row from collection of data in swift with example

Here we will learn ios ui pickerview in swift with example and how to use ios ui control pickerview in swift to select required item from collection of items with example using xcode editor.

IOS UI PickerView

In iOS picker view will allow users quickly to choose required option from multiple options by spinning a wheel on the screen. Picker views are well suited while choosing options between colors, font types, dates, times, etc. Generally, the picker view in iOS will be like as shown below.

 

ios ui pickerview control in swift sample format

 

By using UIPIckerView class reference in our application we can easily implement picker views based on our requirements. We will see how to use picker views in ios with example.

Create iOS Picker View App in Swift

To create new project in iOS Xcode open Xcode from /Applications folder directory. Once we open Xcode the welcome window will open like as shown below. In welcome window click on the second option “Create a new Xcode Project” or choose File --> New --> Project

 

Xcode application to create ios project

 

After selecting “Create a new Xcode project” a new window will open in that we need to choose template.

 

The new Xcode window will contain several built-in app templates to implement common type of iOS apps like page based apps, tab-based apps, games, table-view apps, etc. These templates are having pre-configured interface and source code files. 

 

For this iOS Picker View example, we will use most basic template “Single View Application”. To select this one, Go to the iOS section in left side --> select Application --> In main area of dialog select “Single View Application” and then click on next button like as shown below.

 

Select single view application from ios xcode templates

 

After click Next we will get window like as shown below, in this we need to mention project name and other details for our application.

 

Product Name: “Picker View”

 

The name whatever we enter in Product Name section will be used for the project and app.

 

Organization Name: “Tutlane”

 

You can enter the name of your organization or your own name or you can leave it as blank.

 

Organization Identifier: “com.developersociety”

 

Enter your organization identifier in case if you don't have any organization identifier enter com.example.

 

Bundle Identifier: This value will generate automatically based on the values we entered in Product Name and Organization Identifier.

 

Language: “Swift”

 

Select language type as “Swift” because we are going to develop applications using swift.

 

Devices: “Universal”

 

Choose Devices options as Universal it means that one application is for all apple devices in case if you have any specific requirement to run app only for iPad then you can choose the iPad option to make your application restricted to run only on iPad devices.

 

Use Core Data: Unselected

 

This option is used for database operations. In case if you have any database related operations in your application select this option otherwise unselect the option.

 

Include Unit Tests: Unselected

 

In case if you need unit tests for your application then select this option otherwise unselect it.

 

Include UI Tests: Unselected

 

In case if you need UI tests for your application then select this option otherwise unselect it.

 

Once you finished entering all the options then click on Next button like as shown below

 

Create ios ui pickerview project in swift using xcode

 

Once we click on Next button new dialog will open in that we need to select the location to save our project. Once you select the location to save project then click on Create button like as shown below

 

Give path to save new ios application in xcode

 

After click on Create button the Xcode will create and open a new project. In our project Main.storyboard and ViewController.swift are the main files which we used to design app user interface and to maintain source code. 

 

Main.storyboard - Its visual interface editor and we will use this file to design our app user interface 

 

ViewController.swift - It contains source code of our application and we use this file to write any code related to our app.

 

Now in project select Main.storyboard file the Xcode will open visual interface editor like as shown below.

 

ios ui pickerview project storyboard file in xcode

 

Now select ViewController.swift file in your project that view will be like as shown below.

 

ios ui pickerview project viewcontroller file in xcode

Add iOS UI Controls to View in Swift

Now we will add controls to our application for that open Object Library. The Object Library will appear at the bottom of Xcode in right side. In case if you don't find Object library, click on the button which is at the third position from the left in the library selector bar like as shown below. (Alternatively you can choose View --> Utilities --> Show Object Library.)

 

Object Library in Xcode Application to Search for UI Controls

 

As we discussed our user interface will be in Main.storyboard file so open Main.storyboard file. Now in Object library search for the picker view in Filter field then drag and drop the picker view control into Main.storyboard ViewController same way add two label controls to ViewController like as shown below.

 

ios ui pickerview add controls to storyboard file in xcode

Connect iOS UI Controls to Code in Swift

Now we will make connection between controls and ViewController.Swift code for that click on assistant button (overlap circle) in Xcode toolbar right side corner like as shown below

 

Assistant Editor in iOS Xcode to Mapp Controls with Code

 

To map the controls, press Ctrl button in keyboard and drag the picker view and label controls from canvas interface and drop into ViewController.swift file like as shown below

 

ios ui pickerview map controls to code using xcode

 

Once we add controls to ViewController.swift file then write the custom code to bind values to picker view and get selected option value from picker view. Once we write all required functionality our ViewController.swift file code should be like as shown below

 

import UIKit

class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {

// color and size array

var colorList = ["(( Select ))", "Black", "Blue", "Brown", "Green", "Orange", "Pink" , "Purple", "Red", "Yellow"]

var sizeList: [String]!

// outlet - color and size label

@IBOutlet var colorLabel: UILabel!

@IBOutlet var sizeLabel: UILabel!

//outlet - picker view

@IBOutlet var pickerView: UIPickerView!

// MARK: - view functions

override func viewDidLoad() {

super.viewDidLoad()

// set picker view delegate

self.pickerView.dataSource = self

self.pickerView.delegate = self

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

// MARK: - picker view delegate and data source

// how many component (i.e. column) to be displayed within picker view

func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {

return 2

}

// How many rows are there is each component

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

if component == 0 {

return  self.colorList.count

}

return 0

}

// title/content for row in given component

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {

if component == 0 {

return self.colorList[row]

}

if component == 1 {

return  self.sizeList[row]

}

return "Invalid Row"

}

// called when row selected from any component within a picker view

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

if component == 0 {

// if first row then set --

if row == 0 {

self.colorLabel.text = "--"

}else{

self.colorLabel.text = self.colorList[row]

}

}

}

}

Now we will run and see the output of iOS Delegates application. To run application, first select required simulator (Here we selected iPhone 6s Plus) and click on Play button, located at the top-left corner of the Xcode toolbar like as shown below.

 

Run ios uipickerview application in swift using xcode

Output of iOS Picker View in Swift

Now rotate the Picker View the respective selected color value will shown in label.

 

ios ui pickerview example result or output

 

This is how we can use iOS ui pickerview in swift to choose required option from collection of items based on our requirements in Xcode.

 
 
 

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