Transition of view controllers - from left to righ

问题:

I am NOT using navigation controller, and I am using storyboards.

I have to make a transition from 1 view controller to other, for which I am using segue.

Now I set the segue style to Custom, and in the corresponding class, I override the perform method.

-(void)perform
{
    UIViewController *sourceViewController = [self sourceViewController];
    UIViewController *destinationViewController = [self destinationViewController];

    CATransition *transition = [CATransition animation];
    transition.duration = 0.25;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
    transition.type = kCATransitionPush;
    transition.subtype = kCATransitionFromLeft;

    [sourceViewController.view.layer addAnimation:transition forKey:kCATransition];animated:NO];
    [sourceViewController presentViewController:destinationViewController animated:YES completion:nil];
}

But there is also a property of the destination view controller modalTransitionStyle.

So Right now, the source VC goes from left to right as if it is being pushed, but I want to show that it is being pushed by the destination view controller. Instead, the destination VC does a 'Cover Vertical' by default, and there are only four options available for the modalTransitionStyle property, none of which is working for me.

I think to make it work, this animation should be added to some superview layer, a superview from which both view controllers have been presented. But there is no such superview..

回答1:

Usually you would give a storyboardId to the destinationController and call it like this from the sourceViewController:

//push next view
UIStoryboard *storyboard = self.storyboard;
YourViewControllerClass *destVC = [storyboard instantiateViewControllerWithIdentifier:@"StoryboardID"];
[self.navigationController pushViewController:destVC animated:YES];

Optionally, you can do it manually like this:

    // Get the views.
    UIView * fromView = sourceViewController.view;
    UIView * toView = destinationViewController.view;

    // Get the size of the view area.
    CGRect viewSize = fromView.frame;

    // Add the toView to the fromView
    [fromView.superview addSubview:toView];

    // Position it off screen.
    toView.frame = CGRectMake( 320 , viewSize.origin.y, 320, viewSize.size.height);

    [UIView animateWithDuration:0.4 animations:
     ^{
         // Animate the views on and off the screen. This will appear to slide.
         fromView.frame =CGRectMake( -320 , viewSize.origin.y, 320, viewSize.size.height);
         toView.frame =CGRectMake(0, viewSize.origin.y, 320, viewSize.size.height);
     }
                     completion:^(BOOL finished)
     {
         if (finished)
         {
             // Remove the old view from its parent.
             [fromView removeFromSuperview];

             //I use it to have navigationnBar and TabBar at the same time
             //self.tabBarController.selectedIndex = indexPath.row+1;
         }
     }];

** EDIT **

Inverse function (similar to the back button in the navigation controller):

// Get the views.
UIView * fromView = fromViewController.view;
UIView * toView = destViewController.view;

// Get the size of the view area.
CGRect viewSize = fromView.frame;

// Add the to view to the tab bar view.
[fromView.superview addSubview:toView];

// Position it off screen.
toView.frame = CGRectMake( -320 , viewSize.origin.y, 320, viewSize.size.height);

[UIView animateWithDuration:0.4 animations:
 ^{
     // Animate the views on and off the screen. This will appear to slide.
     fromView.frame =CGRectMake( 320 , viewSize.origin.y, 320, viewSize.size.height);
     toView.frame =CGRectMake(0, viewSize.origin.y, 320, viewSize.size.height);
 }
                 completion:^(BOOL finished)
 {
     if (finished)
     {
         // Remove the old view from the tabbar view.
         [fromView removeFromSuperview];
     }
 }];

回答2:

All of the ViewControllers in my app inherit from MyViewController which, in addition to some other default behaviours, has this property:

@property(readwrite, nonatomic) BOOL slideFromSide;

And this code:

- (void) presentViewController: (UIViewController*) vc animated: (BOOL) flag completion: (void (^)(void)) completion
{
    BOOL slideIn = NO;
    if ([vc isKindOfClass: [MyViewController class]])
    {
        MyViewController *svc = (MyViewController*) vc;
        slideIn = svc.slideFromSide;
    }

    if (slideIn)
    {
        [self addChildViewController: vc];
        [self.view addSubview: vc.view];

        CGRect frame = vc.view.frame;
        frame.origin.x = frame.size.width;
        vc.view.frame = frame;

        frame.origin.x = 0;
        [UIView animateWithDuration: 0.33
                         animations: ^{
                             vc.view.frame = frame;
                         }
         ];
    }
    else
    {
        [super presentViewController: vc animated: flag completion: completion];
    }
}


- (IBAction) backAction: (id) sender
{
    if (_slideFromSide)
    {
        CGRect frame = self.view.frame;
        frame.origin.x = frame.size.width;
        [UIView animateWithDuration: 0.33
                         animations: ^{
                             self.view.frame = frame;
                         }
                         completion:^(BOOL finished) {
                             [self removeFromParentViewController];
                         }
         ];
    }
    else
    {
        [self dismissViewControllerAnimated: YES completion: nil];
    }
}

Then, in the ViewControllers where I want to slide-in, I have:

- (id) initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName: nibNameOrNil bundle: nibBundleOrNil];
    if (self)
    {
        self.slideFromSide = YES;
        // Whatever else you want to do
    }

    return self;
}

Calling a new ViewController is just like normal:

WhateverViewController *vc = [WhateverViewController alloc] initWithNibName: nil bundle: nil];
[self presentViewController: vc animated: YES completion: nil];