Change RootViewcontroller with the Push Transition effect

Question

in my iOS App i need to change the rootviewController of the window in between of app .so when i change my rootviewcontroller dyncamically its flicking the view before its chang

Answer 1

Here is code in Swift for how to make Push and Pop animation in rootviewcontroller.

//Declare enum
enum AnimationType{
        case ANIMATE_RIGHT
        case ANIMATE_LEFT
        case ANIMATE_UP
        case ANIMATE_DOWN
    }
// Create Function...

    func showViewControllerWith(newViewController:UIViewController, usingAnimation animationType:AnimationType)
{

    let currentViewController = UIApplication.sharedApplication().delegate?.window??.rootViewController
    let width = currentViewController?.view.frame.size.width;
    let height = currentViewController?.view.frame.size.height;

    var previousFrame:CGRect?
    var nextFrame:CGRect?

    switch animationType
    {
        case .ANIMATE_LEFT:
            previousFrame = CGRectMake(width!-1, 0.0, width!, height!)
            nextFrame = CGRectMake(-width!, 0.0, width!, height!);
        case .ANIMATE_RIGHT:
            previousFrame = CGRectMake(-width!+1, 0.0, width!, height!);
            nextFrame = CGRectMake(width!, 0.0, width!, height!);
        case .ANIMATE_UP:
            previousFrame = CGRectMake(0.0, height!-1, width!, height!);
            nextFrame = CGRectMake(0.0, -height!+1, width!, height!);
        case .ANIMATE_DOWN:
            previousFrame = CGRectMake(0.0, -height!+1, width!, height!);
            nextFrame = CGRectMake(0.0, height!-1, width!, height!);
    }

    newViewController.view.frame = previousFrame!
    UIApplication.sharedApplication().delegate?.window??.addSubview(newViewController.view)
    UIView.animateWithDuration(0.33,
        animations: { () -> Void in
        newViewController.view.frame = (currentViewController?.view.frame)!
            currentViewController?.view.frame = nextFrame!

        })
        { (fihish:Bool) -> Void in
            UIApplication.sharedApplication().delegate?.window??.rootViewController = newViewController
        }
}


// call the func for ANIMATE_LEFT or ANIMATE_RIGHT etc

     self.showViewControllerWith(rootViewController, usingAnimation: AnimationType.ANIMATE_LEFT)

Hope this helps...