通过导航栏切换页面动画

push动画

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UINavigationControllerDelegate>

@property (weak, nonatomic) IBOutlet UIButton *pushBtn;


@end

#import "ViewController.h"
#import "Transition.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)viewWillAppear:(BOOL)animated {
    self.navigationController.delegate = self;
}


// 导航栏代理方法
- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC {
    if (operation == UINavigationControllerOperationPush) {
        return [Transition new];
    }else{
        return nil;
    }
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}



@end

push动画对象

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "POP.h"

@interface Transition : NSObject <UIViewControllerAnimatedTransitioning>

@end

#import "Transition.h"
#import "ViewController.h"
#import "TransferViewController.h"

@interface Transition ()<CAAnimationDelegate>
@property (nonatomic,strong)id<UIViewControllerContextTransitioning> transitionContext;
@end

@implementation Transition

- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext{
    return  0.7f;
}

- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext {
    
    self.transitionContext = transitionContext;
    ViewController * fromVC = (ViewController *)[transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    TransferViewController * toVC = (TransferViewController *)[transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    UIView * contView = [transitionContext containerView];
    
    UIButton * button = fromVC.pushBtn;
    
    UIBezierPath * maskStartBP =  [UIBezierPath bezierPathWithOvalInRect:button.frame];
    [contView addSubview:fromVC.view];
    [contView addSubview:toVC.view];
    
    
    //创建两个圆形的 UIBezierPath 实例；一个是 button 的 size ，另外一个则拥有足够覆盖屏幕的半径。最终的动画则是在这两个贝塞尔路径之间进行的
    
    CGPoint finalPoint;
    //判断触发点在那个象限
    if(button.frame.origin.x > (toVC.view.bounds.size.width / 2)){
        if (button.frame.origin.y < (toVC.view.bounds.size.height / 2)) {
            //第一象限
            finalPoint = CGPointMake(button.center.x - 0, button.center.y - CGRectGetMaxY(toVC.view.bounds)+30);
        }else{
            //第四象限
            finalPoint = CGPointMake(button.center.x - 0, button.center.y - 0);
        }
    }else{
        if (button.frame.origin.y < (toVC.view.bounds.size.height / 2)) {
            //第二象限
            finalPoint = CGPointMake(button.center.x - CGRectGetMaxX(toVC.view.bounds), button.center.y - CGRectGetMaxY(toVC.view.bounds)+30);
        }else{
            //第三象限
            finalPoint = CGPointMake(button.center.x - CGRectGetMaxX(toVC.view.bounds), button.center.y - 0);
        }
    }
    
    CGFloat radius = sqrt((finalPoint.x * finalPoint.x) + (finalPoint.y * finalPoint.y));
    UIBezierPath * maskFinalBP = [UIBezierPath bezierPathWithOvalInRect:CGRectInset(button.frame, -radius, -radius)];
    
    
    //创建一个 CAShapeLayer 来负责展示圆形遮盖
    CAShapeLayer * maskLayer = [CAShapeLayer layer];
    maskLayer.path = maskFinalBP.CGPath; //将它的 path 指定为最终的 path 来避免在动画完成后会回弹
    toVC.view.layer.mask = maskLayer;
    
    CABasicAnimation * maskLayerAnimation = [CABasicAnimation animationWithKeyPath:@"path"];
    maskLayerAnimation.fromValue = (__bridge id)(maskStartBP.CGPath);
    maskLayerAnimation.toValue = (__bridge id)((maskFinalBP.CGPath));
    maskLayerAnimation.duration = [self transitionDuration:transitionContext];
    maskLayerAnimation.timingFunction = [CAMediaTimingFunction  functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    maskLayerAnimation.delegate = self;
    
    [maskLayer addAnimation:maskLayerAnimation forKey:@"path"];
    
    
    /*  POP的弹框效果 CGPathRef
     
     CAKeyframeAnimation *keyFrame = [CAKeyframeAnimation animationWithKeyPath:@"path"];
     keyFrame.values = @[(__bridge id)(maskStartBP.CGPath),(__bridge id)(maskFinalBP.CGPath)];
     keyFrame.duration = 100.0f;
     keyFrame.additive = YES;
     keyFrame.removedOnCompletion = NO;
     keyFrame.fillMode = kCAFillModeForwards;
     
     
     [maskLayer addAnimation:keyFrame forKey:nil];
     maskLayer.speed = 0.0;
     
     
     POPAnimatableProperty* pop = [POPAnimatableProperty propertyWithName:@"timeOffset" initializer:^(POPMutableAnimatableProperty *prop) {
     // read value
     prop.readBlock = ^(CAShapeLayer *obj, CGFloat values[]) {
     values[0] = obj.timeOffset;
     };
     // write value
     prop.writeBlock = ^(CAShapeLayer *obj, const CGFloat values[]) {
     obj.timeOffset = values[0];
     };
     // dynamics threshold
     prop.threshold = 0.1;
     }];
     
     
     POPSpringAnimation *popSpring = [POPSpringAnimation animation];
     popSpring.fromValue = @(0.0);
     popSpring.toValue =  @(100.f);
     popSpring.springBounciness = 1.0;//弹性
     popSpring.springSpeed = 20.0;//速度
     popSpring.dynamicsTension = 700;//张力
     popSpring.dynamicsFriction = 5; // 摩擦力
     popSpring.dynamicsMass = 1;
     popSpring.property = pop;
     popSpring.delegate = self;
     [maskLayer pop_addAnimation:popSpring forKey:nil];
     
     */
    
    
    //    kPOPShapeLayerStrokeStart
    
    //创建一个关于 path 的 CABasicAnimation 动画来从 circleMaskPathInitial.CGPath 到 circleMaskPathFinal.CGPath 。同时指定它的 delegate 来在完成动画时做一些清除工作
}

- (void)pop_animationDidStop:(POPAnimation *)anim finished:(BOOL)finished {
    //告诉 iOS 这个 transition 完成
    [self.transitionContext completeTransition:![self. transitionContext transitionWasCancelled]];
    //清除 fromVC 的 mask
    [self.transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey].view.layer.mask = nil;
    [self.transitionContext viewControllerForKey:UITransitionContextToViewControllerKey].view.layer.mask = nil;
}

#pragma mark - CABasicAnimation的Delegate
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
    
    //告诉 iOS 这个 transition 完成
    [self.transitionContext completeTransition:![self. transitionContext transitionWasCancelled]];
    //清除 fromVC 的 mask
    [self.transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey].view.layer.mask = nil;
    [self.transitionContext viewControllerForKey:UITransitionContextToViewControllerKey].view.layer.mask = nil;
    
}

@end

pop动画

#import <UIKit/UIKit.h>

@interface TransferViewController : UIViewController <UINavigationControllerDelegate>
@property (weak, nonatomic) IBOutlet UIButton *popBtn;

@end

#import "TransferViewController.h"
#import "InvertTransition.h"

@interface TransferViewController ()

@end

@implementation TransferViewController
{
    UIPercentDrivenInteractiveTransition * percentTransition;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    UIScreenEdgePanGestureRecognizer * edgeGes = [[UIScreenEdgePanGestureRecognizer alloc]initWithTarget:self action:@selector(edgePan:)];
    edgeGes.edges = UIRectEdgeLeft;
    [self.view addGestureRecognizer:edgeGes];
}

-(void)viewWillAppear:(BOOL)animated{
    self.navigationController.delegate = self;
}

- (IBAction)clickToPop:(id)sender {
    [self.navigationController popViewControllerAnimated:YES];
}

- (id <UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController interactionControllerForAnimationController:(id <UIViewControllerAnimatedTransitioning>) animationController {
    return percentTransition;
}

- (id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC {
    if (operation == UINavigationControllerOperationPop) {
        InvertTransition * invert = [InvertTransition new];
        return invert;
    }else{
        return nil;
    }
}

- (void)edgePan:(UIPanGestureRecognizer *)recognizer{
    CGFloat per = [recognizer translationInView:self.view].x / (self.view.bounds.size.width);
    per = MIN(1.0,(MAX(0.0, per)));
    
    if (recognizer.state == UIGestureRecognizerStateBegan) {
        percentTransition = [[UIPercentDrivenInteractiveTransition alloc]init];
        [self.navigationController popViewControllerAnimated:YES];
    }else if (recognizer.state == UIGestureRecognizerStateChanged){
        [percentTransition updateInteractiveTransition:per];
    }else if (recognizer.state == UIGestureRecognizerStateEnded || recognizer.state == UIGestureRecognizerStateCancelled){
        if (per > 0.3) {
            [percentTransition finishInteractiveTransition];
        }else{
            [percentTransition cancelInteractiveTransition];
        }
        percentTransition = nil;
    }
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}



@end

pop动画对象

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface InvertTransition : NSObject <UIViewControllerAnimatedTransitioning>

@end

#import "InvertTransition.h"
#import "ViewController.h"
#import "TransferViewController.h"

@interface InvertTransition ()
@property(nonatomic,strong)id<UIViewControllerContextTransitioning>transitionContext;
@end

@implementation InvertTransition
- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext {
    return 0.7f;
}

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
    
    self.transitionContext = transitionContext;
    TransferViewController * fromVC = (TransferViewController *)[transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    ViewController * toVC   = (ViewController *)[transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    UIView * contaionerView = [transitionContext containerView];
    UIButton * button = toVC.pushBtn;
    
    [contaionerView addSubview:toVC.view]; // 这个顺序不能变
    [contaionerView addSubview:fromVC.view];
    
    
    
    
    
    
    
    UIBezierPath * finalPath = [UIBezierPath bezierPathWithOvalInRect:button.frame];
    
    CGPoint finalPoint;
    
    //判断触发点在那个象限
    if(button.frame.origin.x > (toVC.view.bounds.size.width / 2)){
        if (button.frame.origin.y < (toVC.view.bounds.size.height / 2)) {
            //第一象限
            finalPoint = CGPointMake(button.center.x - 0, button.center.y - CGRectGetMaxY(toVC.view.bounds)+30);
        }else{
            //第四象限
            finalPoint = CGPointMake(button.center.x - 0, button.center.y - 0);
        }
    }else{
        if (button.frame.origin.y < (toVC.view.bounds.size.height / 2)) {
            //第二象限
            finalPoint = CGPointMake(button.center.x - CGRectGetMaxX(toVC.view.bounds), button.center.y - CGRectGetMaxY(toVC.view.bounds)+30);
        }else{
            //第三象限
            finalPoint = CGPointMake(button.center.x - CGRectGetMaxX(toVC.view.bounds), button.center.y - 0);
        }
    }
    
    CGFloat radius = sqrt(finalPoint.x * finalPoint.x + finalPoint.y * finalPoint.y);
    UIBezierPath *startPath = [UIBezierPath bezierPathWithOvalInRect:CGRectInset(button.frame, -radius, -radius)];
    
    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.path = finalPath.CGPath;
    fromVC.view.layer.mask = maskLayer;
    
    
    CABasicAnimation *pingAnimation = [CABasicAnimation animationWithKeyPath:@"path"];
    pingAnimation.fromValue = (__bridge id)(startPath.CGPath);
    pingAnimation.toValue   = (__bridge id)(finalPath.CGPath);
    pingAnimation.duration = [self transitionDuration:transitionContext];
    pingAnimation.timingFunction = [CAMediaTimingFunction  functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    
    pingAnimation.delegate = self;
    
    [maskLayer addAnimation:pingAnimation forKey:@"pingInvert"];
}

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
    
    [self.transitionContext completeTransition:![self.transitionContext transitionWasCancelled]];
    [self.transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey].view.layer.mask = nil;
    [self.transitionContext viewControllerForKey:UITransitionContextToViewControllerKey].view.layer.mask = nil;
    
}
@end