UIViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"nav"];

// present form sheet with view controller
[self presentFormSheetWithViewController:vc animated:YES completionHandler:^(MZFormSheetController *formSheetController) {
   //do sth
}];

[self dismissFormSheetControllerAnimated:YES completionHandler:^(MZFormSheetController *formSheetController) {
    // do sth
}];

typedef NS_ENUM(NSInteger, MZFormSheetTransitionStyle) {
    MZFormSheetTransitionStyleSlideFromTop = 0,
    MZFormSheetTransitionStyleSlideFromBottom,
    MZFormSheetTransitionStyleSlideFromLeft,
    MZFormSheetTransitionStyleSlideFromRight,
    MZFormSheetTransitionStyleSlideAndBounceFromLeft,
    MZFormSheetTransitionStyleSlideAndBounceFromRight,
    MZFormSheetTransitionStyleFade,
    MZFormSheetTransitionStyleBounce,
    MZFormSheetTransitionStyleDropDown,
    MZFormSheetTransitionStyleCustom,
    MZFormSheetTransitionStyleNone,
};

/**
 Subclasses may override to add custom transition animation.
 You need to setup transitionStyle to MZFormSheetTransitionStyleCustom to call this method.
 When animation is finished you should must call super method or completionBlock to keep view life cycle.
 */
- (void)customTransitionEntryWithCompletionBlock:(MZFormSheetTransitionCompletionHandler)completionBlock;
- (void)customTransitionOutWithCompletionBlock:(MZFormSheetTransitionCompletionHandler)completionBlock;

For example, transition from right side

- (void)customTransitionEntryWithCompletionBlock:(MZFormSheetTransitionCompletionHandler)completionBlock
{
    // It is very important to use self.view.bounds not self.view.frame !!!
    // When you rotate your device, the device is not changing its screen size.
    // It is staying the same, however the view is changing. So this is why you would want to use bounds.
    
    CGRect formSheetRect = self.presentedFSViewController.view.frame;
    CGRect originalFormSheetRect = formSheetRect;
    originalFormSheetRect.origin.x = self.view.bounds.size.width - formSheetRect.size.width - 10;
    formSheetRect.origin.x = self.view.bounds.size.width;
    self.presentedFSViewController.view.frame = formSheetRect;
    [UIView animateWithDuration:MZFormSheetControllerDefaultAnimationDuration
                     animations:^{
                         self.presentedFSViewController.view.frame = originalFormSheetRect;
                     }
                     completion:^(BOOL finished) {
                         if (completionBlock) {
                             completionBlock();
                         }
                     }];
}
- (void)customTransitionOutWithCompletionBlock:(MZFormSheetTransitionCompletionHandler)completionBlock
{
    CGRect formSheetRect = self.presentedFSViewController.view.frame;
    formSheetRect.origin.x = self.view.bounds.size.width;
    [UIView animateWithDuration:MZFormSheetControllerDefaultAnimationDuration
                          delay:0
                        options:UIViewAnimationOptionCurveEaseIn
                     animations:^{
                         self.presentedFSViewController.view.frame = formSheetRect;
                     }
                     completion:^(BOOL finished) {
                         if (completionBlock) {
                             completionBlock();
                         }
                     }];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.transitionStyle = MZFormSheetTransitionStyleCustom;
    self.presentedFSViewController.view.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin;
}

UIViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"nav"];
UIViewController *modal = [self.storyboard instantiateViewControllerWithIdentifier:@"modal"];

[self presentFormSheetWithViewController:vc animated:YES transitionStyle:MZFormSheetTransitionStyleSlideAndBounceFromLeft completionHandler:^(MZFormSheetController *formSheetController) {

    [formSheetController presentViewController:modal animated:YES completion:^{

    }];
    
}];

UIViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"facebook"];

MZFormSheetController *formSheet = [[MZFormSheetController alloc] initWithViewController:vc];
formSheet.shouldDismissOnBackgroundViewTap = YES;
formSheet.transitionStyle = MZFormSheetTransitionStyleSlideFromBottom;
formSheet.cornerRadius = 8.0;
formSheet.portraitTopInset = 6.0;
formSheet.landscapeTopInset = 6.0;
formSheet.presentedFormSheetSize = CGSizeMake(320, 200);

    
formSheet.willPresentCompletionHandler = ^(UIViewController *presentedFSViewController){
    presentedFSViewController.view.autoresizingMask = presentedFSViewController.view.autoresizingMask | UIViewAutoresizingFlexibleWidth;
};

[formSheet presentAnimated:YES completionHandler:^(UIViewController *presentedFSViewController) {
        
}];

or

[self presentFormSheetController:formSheet animated:YES completionHandler:^(MZFormSheetController *formSheetController) {

}];

id appearance = [MZFormSheetController appearance];

[appearance setBackgroundOpacity:0.2];
[appearance setCornerRadius:4];
[appearance setShadowOpacity:0.4];

@interface MZFormSheetBackgroundWindow : UIWindow

/**
 The background color of the background view.
 If last form sheet will dismiss, backgroundColor will change to default.
 If you want to set it permanently to another color use appearance proxy on MZFormSheetBackgroundWindow.
 By default, this is a black at with a 0.5 alpha component
 */
@property (nonatomic, strong) UIColor *backgroundColor UI_APPEARANCE_SELECTOR;

/**
 Returns the window that is displayed in below form sheet controller
 */
+ (instancetype)sharedWindow;

@end

/**
 Center form sheet vertically.
 By default, this is NO
 */
@property (nonatomic, assign) BOOL centerFormSheetVertically UI_APPEARANCE_SELECTOR;

/**
 Distance that the presented form sheet view is inset from the status bar in landscape orientation.
 By default, this is 66.0
 */
@property (nonatomic, assign) CGFloat landscapeTopInset UI_APPEARANCE_SELECTOR;

/**
 Distance that the presented form sheet view is inset from the status bar in portrait orientation.
 By default, this is 6.0
 */
@property (nonatomic, assign) CGFloat portraitTopInset UI_APPEARANCE_SELECTOR;

/**
 The radius to use when drawing rounded corners for the layer’s presented form sheet view background.
 By default, this is 6.0
 */
@property (nonatomic, assign) CGFloat cornerRadius UI_APPEARANCE_SELECTOR;

/**
 The blur radius (in points) used to render the layer’s shadow.
 By default, this is 6.0
 */
@property (nonatomic, assign) CGFloat shadowRadius UI_APPEARANCE_SELECTOR;

/**
 The opacity of the layer’s shadow.
 By default, this is 0.5
 */
@property (nonatomic, assign) CGFloat shadowOpacity UI_APPEARANCE_SELECTOR;

/**
 Size for presented form sheet controller
 By default, this is CGSizeMake(284.0,284.0)
 */
@property (nonatomic, assign) CGSize presentedFormSheetSize UI_APPEARANCE_SELECTOR;

/**
 The handler to call when presented form sheet is before entry transition and its view will show on window.
 */
@property (nonatomic, copy) MZFormSheetCompletionHandler willPresentCompletionHandler;

/**
 The handler to call when presented form sheet will be dismiss, this is called before out transition animation.
 */
@property (nonatomic, copy) MZFormSheetCompletionHandler willDismissCompletionHandler;

/**
 The handler to call when presented form sheet is after entry transition animation.
 */
@property (nonatomic, copy) MZFormSheetCompletionHandler didPresentCompletionHandler;

/**
 The handler to call when presented form sheet is after dismiss.
 */
@property (nonatomic, copy) MZFormSheetCompletionHandler didDismissCompletionHandler;

/**
 Notifications are posted right after completion handlers
 
 @see willPresentCompletionHandler
 @see willDismissCompletionHandler
 @see didPresentCompletionHandler
 @see didDismissCompletionHandler
 */

extern NSString *const MZFormSheetWillPresentNotification;
extern NSString *const MZFormSheetWillDismissNotification;
extern NSString *const MZFormSheetDidPresentNotification;
extern NSString *const MZFormSheetDidDismissNotification;

/**
 Returns whether the form sheet controller should dismiss after background view tap.
 By default, this is NO
 */
@property (nonatomic, assign) BOOL shouldDismissOnBackgroundViewTap UI_APPEARANCE_SELECTOR;

/**
 The handler to call when user tap on background view
 */
@property (nonatomic, copy) MZFormSheetBackgroundViewTapCompletionHandler didTapOnBackgroundViewCompletionHandler;