How do I use a UISegmentedControl to switch views? - ios

Question

I'm trying to figure out how to use the different states of a UISegmentedControl to switch views, similar to how Apple does it in the App Store when switiching between 'Top Paid' and 'Top Free'.

Answer 1

The simplest approach is to have two views that you can toggle their visibility to indicate which view has been selected. Here is some sample code on how it can be done, definitely not an optimized way to handle the views but just to demonstrate how you can use the UISegmentControl to toggle the visible view:
- (IBAction)segmentSwitch:(id)sender {
UISegmentedControl *segmentedControl = (UISegmentedControl *) sender;
NSInteger selectedSegment = segmentedControl.selectedSegmentIndex;
if (selectedSegment == 0) {
//toggle the correct view to be visible
[firstView setHidden:NO];
[secondView setHidden:YES];
}
else{
//toggle the correct view to be visible
[firstView setHidden:YES];
[secondView setHidden:NO];
}
}
You can of course further re-factor the code to hide/show the right view.

Answer 2

In my case my views are quite complex and I cannot just change the hidden property of different views because it would take up too much memory.
I've tried several solutions and non of them worked for me, or performed erratically, specially with the titleView of the navBar not always showing the segmentedControl when pushing/popping views.
I found this blog post about the issue that explains how to do it in the proper way. Seems he had the aid of Apple engineers at WWDC'2010 to come up with this solution.
http://redartisan.com/2010/6/27/uisegmented-control-view-switching-revisited
The solution in this link is hands down the best solution I've found about the issue so far. With a little bit of adjustment it also worked fine with a tabBar at the bottom

Answer 3

Or if its a table, you can reload the table and in cellForRowAtIndex, populate the table from different data sources based on the segment option selected.

Answer 4

One idea is to have the view with the segmented controls have a container view that you fill with the different subviews (add as a sole subview of the container view when the segments are toggled). You can even have separate view controllers for those subviews, though you have to forward on important methods like "viewWillAppear" and "viewWillDisappear" if you need them (and they will have to be told what navigation controller they are under).
Generally that works pretty well because you can lay out the main view with container in IB, and the subviews will fill whatever space the container lets them have (make sure your autoresize masks are set up properly).

Answer 5

Try using SNFSegmentedViewController, an open-source component that does exactly what you're looking for with a setup like UITabBarController.

Answer 6

From the answer of #Ronnie Liew, I create this:
//
// ViewController.m
// ResearchSegmentedView
//
// Created by Ta Quoc Viet on 5/1/14.
// Copyright (c) 2014 Ta Quoc Viet. All rights reserved.
//
#define SIZE_OF_SEGMENT 56
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize theSegmentControl;
UIView *firstView;
UIView *secondView;
CGRect leftRect;
CGRect centerRect;
CGRect rightRect;
- (void)viewDidLoad
{
[super viewDidLoad];
leftRect = CGRectMake(-self.view.frame.size.width, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);
centerRect = CGRectMake(0, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);
rightRect = CGRectMake(self.view.frame.size.width, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);
firstView = [[UIView alloc] initWithFrame:centerRect];
[firstView setBackgroundColor:[UIColor orangeColor]];
secondView = [[UIView alloc] initWithFrame:rightRect];
[secondView setBackgroundColor:[UIColor greenColor]];
[self.view addSubview:firstView];
[self.view addSubview:secondView];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)segmentSwitch:(UISegmentedControl*)sender {
NSInteger selectedSegment = sender.selectedSegmentIndex;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.2];
if (selectedSegment == 0) {
//toggle the correct view to be visible
firstView.frame = centerRect;
secondView.frame = rightRect;
}
else{
//toggle the correct view to be visible
firstView.frame = leftRect;
secondView.frame = centerRect;
}
[UIView commitAnimations];
}
#end

Answer 7

Assign .H in
UISegmentedControl *lblSegChange;
- (IBAction)segValChange:(UISegmentedControl *) sender
Declare .M
- (IBAction)segValChange:(UISegmentedControl *) sender
{
if(sender.selectedSegmentIndex==0)
{
viewcontroller1 *View=[[viewcontroller alloc]init];
[self.navigationController pushViewController:view animated:YES];
}
else
{
viewcontroller2 *View2=[[viewcontroller2 alloc]init];
[self.navigationController pushViewController:view2 animated:YES];
}
}

Answer 8

Swift version:
The parent view controller is responsible for setting the size and position of the view of each child view controller. The view of the child view controller becomes part of the parent view controller's view hierarchy.
Define lazy properties:
private lazy var summaryViewController: SummaryViewController = {
// Load Storyboard
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
// Instantiate View Controller
var viewController = storyboard.instantiateViewController(withIdentifier: "SummaryViewController") as! SummaryViewController
// Add View Controller as Child View Controller
self.add(asChildViewController: viewController)
return viewController
}()
private lazy var sessionsViewController: SessionsViewController = {
// Load Storyboard
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
// Instantiate View Controller
var viewController = storyboard.instantiateViewController(withIdentifier: "SessionsViewController") as! SessionsViewController
// Add View Controller as Child View Controller
self.add(asChildViewController: viewController)
return viewController
}()
Show/Hide Child View Controllers:
private func add(asChildViewController viewController: UIViewController) {
// Add Child View Controller
addChildViewController(viewController)
// Add Child View as Subview
view.addSubview(viewController.view)
// Configure Child View
viewController.view.frame = view.bounds
viewController.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
// Notify Child View Controller
viewController.didMove(toParentViewController: self)
}
private func remove(asChildViewController viewController: UIViewController) {
// Notify Child View Controller
viewController.willMove(toParentViewController: nil)
// Remove Child View From Superview
viewController.view.removeFromSuperview()
// Notify Child View Controller
viewController.removeFromParentViewController()
}
Manage SegmentedControl tapEvent
private func updateView() {
if segmentedControl.selectedSegmentIndex == 0 {
remove(asChildViewController: sessionsViewController)
add(asChildViewController: summaryViewController)
} else {
remove(asChildViewController: summaryViewController)
add(asChildViewController: sessionsViewController)
}
}
And of course you are able to use within your child view controller classes:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
print("Summary View Controller Will Appear")
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
print("Summary View Controller Will Disappear")
}
Reference:
https://cocoacasts.com/managing-view-controllers-with-container-view-controllers/

Answer 9

A quick Swift Version:
#IBAction func segmentControlValueChanged(_ sender: UISegmentedControl) {
if segmentControl.selectedSegmentIndex == 0 {
// do something
} else {
// do something else
}
}