ifish/Ifish/controllers/IfishTabControllers/消息/IfishIMFiles/Sessions/Delegate/NTESNavigationAnimator.m

//
//  NTESNavigationAnimator.m
//  NIM
//
//  Created by chris on 16/1/31.
//  Copyright © 2016年 Netease. All rights reserved.
//

#import "NTESNavigationAnimator.h"
#import "UIView+NTES.h"
//#import "NTESMainTabController.h"
#import "IfishMianTabViewController.h"

@implementation NTESNavigationAnimator

- (instancetype)initWithNavigationController:(UINavigationController *)navigationController
{
    self = [super init];
    if (self) {
        _navigationController = navigationController;
    }
    return self;
}

- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext
{
    return 0.35;
}

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
    
    switch (self.currentOpearation) {
        case UINavigationControllerOperationPop:
            [self popAnimation:transitionContext];
            break;
        case UINavigationControllerOperationPush:
            [self pushAnimation:transitionContext];
            break;
        default:
            break;
    }
}


- (void)pushAnimation:(id<UIViewControllerContextTransitioning>)transitionContext
{
    UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    
    UIView *containerView = [transitionContext containerView];
    UINavigationController *navigationController = fromViewController.navigationController;
    UITabBarController *tabbarController = fromViewController.tabBarController;
    //使用xib可能会出现view的size不对的情况
    CGRect frame = fromViewController.view.frame;
    if ((toViewController.edgesForExtendedLayout & UIRectEdgeTop) == 0)
    {
        frame = CGRectOffset(navigationController.view.frame, 0, navigationController.navigationBar.bottom);
    }
    if ((toViewController.edgesForExtendedLayout & UIRectEdgeBottom) == 0) {
        CGRect slice     = CGRectZero;
        CGRect remainder = CGRectZero;
        CGRectDivide(frame, &slice, &remainder, tabbarController.tabBar.height, CGRectMaxYEdge);
        frame = remainder;
    }
    toViewController.view.frame = frame;
    
    [containerView addSubview:fromViewController.view];
    [containerView addSubview:toViewController.view];
    
    
    CGFloat width  = containerView.width;
    toViewController.view.left = width;
    
    [self callAnimationWillStart];
    CGFloat duration = [self transitionDuration:transitionContext];
    
    [UIView animateWithDuration:duration animations:^{
        fromViewController.view.right = width * 0.5;
        toViewController.view.right  = width;
    } completion:^(BOOL finished) {
        [transitionContext completeTransition:![transitionContext transitionWasCancelled]];
        [self callAnimationDidEnd];
    }];
}



- (void)popAnimation:(id<UIViewControllerContextTransitioning>)transitionContext
{
    UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    CGFloat snapshootHeight = [UIApplication sharedApplication].statusBarFrame.size.height + fromViewController.navigationController.navigationBar.height;
    
    UIView          *fakeBar = [fromViewController.navigationController.view
                        resizableSnapshotViewFromRect:CGRectMake(0, 0,fromViewController.view.width, snapshootHeight) afterScreenUpdates:NO withCapInsets:UIEdgeInsetsZero];
    UINavigationBar *tureBar = toViewController.navigationController.navigationBar;
    
    BOOL hidesBottomBar = toViewController.hidesBottomBarWhenPushed && self.navigationController.viewControllers.firstObject != toViewController;
    
    UITabBar *tabbar = [IfishMianTabViewController instance].tabBar;
    UIView *containerView = [transitionContext containerView];
    
    [containerView addSubview:toViewController.view];
    if (!hidesBottomBar) {
        [containerView addSubview:tabbar];
    }
    if (self.animationType == NTESNavigationAnimationTypeCross) {
        [containerView addSubview:tureBar];
        [fromViewController.view addSubview:fakeBar];
    }
    [containerView addSubview:fromViewController.view];
    
    
    CGFloat width  = containerView.width;
    
    toViewController.view.right = width * 0.5;
    tabbar.right = width * 0.5;
    
    [self callAnimationWillStart];
    CGFloat duration = [self transitionDuration:transitionContext];
    [UIView animateWithDuration:duration animations:^{
        fromViewController.view.left = width;
        toViewController.view.right  = width;
        tabbar.right = width;
        fakeBar.alpha = 0.0;
    } completion:^(BOOL finished) {
        [[IfishMianTabViewController instance].view addSubview:tabbar];
        [toViewController.navigationController.view addSubview:tureBar];
        [fakeBar removeFromSuperview];
        [transitionContext completeTransition:![transitionContext transitionWasCancelled]];
        [self callAnimationDidEnd];
    }];
}

- (void)callAnimationWillStart
{
    if ([self.delegate respondsToSelector:@selector(animationWillStart:)]) {
        [self.delegate animationWillStart:self];
    }
}

- (void)callAnimationDidEnd
{
    if ([self.delegate respondsToSelector:@selector(animationDidEnd:)]) {
        [self.delegate animationDidEnd:self];
    }
}

@end