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Overrode UITabBarController methods so that they update the segmented control #3

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Overrode UITabBarController methods so that they update the segmented control #3

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5 changes: 5 additions & 0 deletions SNFSegmentedViewController/SNFSegmentedViewController.h
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,11 @@

#import <UIKit/UIKit.h>

/**
* SNFSegmentedViewController is the simplest way to use a UISegmentedControl to switch between view controllers.
* Just set the view controllers property in code or in a storyboard.
* The UIViewController's title is used for the segmented control. If the title is nil, an empty string is used instead.
*/
@interface SNFSegmentedViewController : UITabBarController

@property (strong, nonatomic, readonly) UISegmentedControl *segmentedControl;
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26 changes: 22 additions & 4 deletions SNFSegmentedViewController/SNFSegmentedViewController.m
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Expand Up @@ -48,7 +48,7 @@ - (void)viewWillAppear:(BOOL)animated {

#pragma mark - IB Action

- (IBAction)segmentTapped:(UISegmentedControl *)sender {
- (void)segmentTapped:(UISegmentedControl *)sender {
self.selectedIndex = sender.selectedSegmentIndex;
}

Expand All @@ -57,10 +57,10 @@ - (IBAction)segmentTapped:(UISegmentedControl *)sender {
- (void)configureForInitialization {
self.delegate = self;

NSMutableArray *titles = [NSMutableArray arrayWithCapacity:[self.tabBar.items count]];
NSMutableArray *titles = [NSMutableArray arrayWithCapacity:self.tabBar.items.count];
for (UITabBarItem *tabBarItem in self.tabBar.items) {
[titles addObject:tabBarItem.title];
[titles addObject:tabBarItem.title ?: @""];
}

_segmentedControl = [[UISegmentedControl alloc] initWithItems:[titles copy]];
Expand Down Expand Up @@ -91,4 +91,22 @@ - (void)hideTabBar {

}

#pragma mark - UITabBarController overrides

- (void)setSelectedIndex:(NSUInteger)selectedIndex {
[super setSelectedIndex:selectedIndex];
self.segmentedControl.selectedSegmentIndex = selectedIndex;
}

- (void)setSelectedViewController:(UIViewController *)selectedViewController {
[super setSelectedViewController:selectedViewController];
self.segmentedControl.selectedSegmentIndex = [self.viewControllers indexOfObject:selectedViewController];
}

//setViewControllers funnels to this method so we do not need to override that method.
- (void)setViewControllers:(NSArray *)viewControllers animated:(BOOL)animated {
[super setViewControllers:viewControllers animated:animated];
[self configureForInitialization];
}

@end