Swipe view by gesture

This is a sample of 2-view swipe.

Overview

Prepare 3 viewcontroller.
First is root(main) view controller.
This has 2 viewcontroller(left, center)
It manage 2 view action and view size.
You can set left and center viewcontroller you want to add.
You can swipe both viewcontroller.

Sample

Let’s go!

SeparatorViewController.h

@interface SeparatorViewController : UIViewController
@property (nonatomic, strong)UIViewController *leftViewController;
@property (nonatomic, strong)UIViewController *centerViewController;
@property (nonatomic, assign) int width;
@end

SeparatorViewController.m

#import "SeparatorViewController.h"

@interface SeparatorViewController ()
@end

@implementation SeparatorViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // Erorr Handling
    if (self.leftViewController == nil) return;
    if (self.centerViewController == nil) return;
    if (self.width == 0 ) return;
    
    [self deafultPoistion];
    
    // Arrange Left View Left
    UIPanGestureRecognizer *panLeftGesture = [[UIPanGestureRecognizer alloc]
                                          initWithTarget:self action:@selector(handlePanLeft:)];
    [self.leftViewController.view addGestureRecognizer:panLeftGesture];
    
    // Arrange Center View Controller
    UIPanGestureRecognizer *panRightGesture = [[UIPanGestureRecognizer alloc]
                                          initWithTarget:self action:@selector(handlePanCenter:)];
    [self.centerViewController.view addGestureRecognizer:panRightGesture];
    
    
    [self.view addSubview:self.leftViewController.view];
    [self.view addSubview:self.centerViewController.view];
}

#pragma mark - Default
-(void)deafultPoistion {
    if (self.width == 0) return;
    float left_width = self.view.bounds.size.width * self.width / 100;
    float center_width = self.view.bounds.size.width * (100 - self.width) / 100;
    
    [self setViewPosition:left_width center_width:center_width];
}

-(void)setViewPosition:(float)left_width center_width:(float)center_width {
    self.leftViewController.view.frame = CGRectMake(self.view.bounds.origin.x,
                                                    self.view.bounds.origin.y,
                                                    left_width,
                                                    self.view.bounds.size.height);
    self.centerViewController.view.frame = CGRectMake(self.view.bounds.origin.x + left_width,
                                                      self.view.bounds.origin.y,
                                                      center_width,
                                                      self.view.bounds.size.height);
}

#pragma mark - Event
-(void)handlePanLeft:(UIPanGestureRecognizer *)sender {
    
    UIPanGestureRecognizer* pan = (UIPanGestureRecognizer*) sender;
    CGPoint location = [pan translationInView:self.view];
    //CGFloat velocityX = [pan velocityInView:self.view].x;
    
    // Calculte position
    float current_left = self.leftViewController.view.bounds.size.width;
    if ( current_left + location.x > 0 && current_left + location.x < self.view.bounds.size.width ) {
        current_left = current_left + location.x;
    }
    float current_center = self.view.bounds.size.width - current_left;
        
    // Set position
    &#91;self setViewPosition:current_left center_width:current_center&#93;;
    &#91;sender setTranslation:CGPointZero inView:self.view&#93;;
}

-(void)handlePanCenter:(UIPanGestureRecognizer *)sender {
    UIPanGestureRecognizer* pan = (UIPanGestureRecognizer*) sender;
    CGPoint location = &#91;pan translationInView:self.view&#93;;
    
    // Calculate position
    float current_center = self.centerViewController.view.bounds.size.width;
    if ( current_center - location.x > 0 && current_center - location.x < self.view.bounds.size.width ) {
        current_center = current_center - location.x;
    }
    float current_left = self.view.bounds.size.width - current_center;
    &#91;self setViewPosition:current_left center_width:current_center&#93;;
    &#91;sender setTranslation:CGPointZero inView:self.view&#93;;
}
@end
&#91;/cpp&#93;

<h4>Test Code</h4>
[cpp]
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    
    SeparatorViewController *controller = [[SeparatorViewController alloc] init];
    UIViewController *left = [[UIViewController alloc] init];
    [left.view setBackgroundColor:[UIColor blueColor]];
    UIViewController *center = [[UIViewController alloc] init];
    [center.view setBackgroundColor:[UIColor redColor]];
    controller.width = 30;  // percentage
    controller.leftViewController = left;
    controller.centerViewController = center;
    
    self.window.rootViewController = controller;
    [self.window makeKeyAndVisible];
    return YES;
}

Result

You can swipe both blue and red view you like.