方案一：
// UINavigationController+FUFNavigation.h
// ShellApp
//
// Created by dolway on 2020/4/24.
// Copyright © 2020 bri. All rights reserved.
//
#import <UIKit/UIKit.h>
NS_ASSUME_NONNULL_BEGIN
@interface UINavigationController (FUFNavigation)
@end
NS_ASSUME_NONNULL_END
//
// UINavigationController+FUFNavigation.m
// ShellApp
//
// Created by dolway on 2020/4/24.
// Copyright © 2020 bri. All rights reserved.
//
#import "UINavigationController+FUFNavigation.h"
@implementation UINavigationController (FUFNavigation)
- (void)viewDidLoad {
[super viewDidLoad];
UIGestureRecognizer *gesture = self.interactivePopGestureRecognizer;
gesture.enabled = NO;
UIView *gestureView = gesture.view;
UIPanGestureRecognizer *popRecognizer = [[UIPanGestureRecognizer alloc] init];
popRecognizer.delegate = self;
popRecognizer.maximumNumberOfTouches = 1;
[gestureView addGestureRecognizer:popRecognizer];
/**
* 获取系统手势的target数组
*/
NSMutableArray *_targets = [gesture valueForKey:@"_targets"];
/**
* 获取它的唯一对象，我们知道它是一个叫UIGestureRecognizerTarget的私有类，它有一个属性叫_target
*/
id gestureRecognizerTarget = [_targets firstObject];
/**
* 获取_target:_UINavigationInteractiveTransition，它有一个方法叫handleNavigationTransition:
*/
id navigationInteractiveTransition = [gestureRecognizerTarget valueForKey:@"_target"];
/**
* 通过前面的打印，我们从控制台获取出来它的方法签名。
*/
SEL handleTransition = NSSelectorFromString(@"handleNavigationTransition:");
/**
* 创建一个与系统一模一样的手势，我们只把它的类改为UIPanGestureRecognizer
*/
[popRecognizer addTarget:navigationInteractiveTransition action:handleTransition];
}
@end
方案二：
//
// Nav.h
// CustomPopAnimation
//
// Created by Jazys on 15/3/30.
// Copyright (c) 2015年 Jazys. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface Nav : UINavigationController
@end
//
// Nav.m
// CustomPopAnimation
//
// Created by Jazys on 15/3/30.
// Copyright (c) 2015年 Jazys. All rights reserved.
//
#import "Nav.h"
#import "NavigationInteractiveTransition.h"
@interface Nav () <UIGestureRecognizerDelegate>
@property (nonatomic, weak) UIPanGestureRecognizer *popRecognizer;
@property (nonatomic, strong) NavigationInteractiveTransition *navT;
@end
@implementation Nav
- (void)viewDidLoad {
[super viewDidLoad];
UIGestureRecognizer *gesture = self.interactivePopGestureRecognizer;
gesture.enabled = NO;
UIView *gestureView = gesture.view;
UIPanGestureRecognizer *popRecognizer = [[UIPanGestureRecognizer alloc] init];
popRecognizer.delegate = self;
popRecognizer.maximumNumberOfTouches = 1;
[gestureView addGestureRecognizer:popRecognizer];
/**
* 获取系统手势的target数组
*/
NSMutableArray *_targets = [gesture valueForKey:@"_targets"];
/**
* 获取它的唯一对象，我们知道它是一个叫UIGestureRecognizerTarget的私有类，它有一个属性叫_target
*/
id gestureRecognizerTarget = [_targets firstObject];
/**
* 获取_target:_UINavigationInteractiveTransition，它有一个方法叫handleNavigationTransition:
*/
id navigationInteractiveTransition = [gestureRecognizerTarget valueForKey:@"_target"];
/**
* 通过前面的打印，我们从控制台获取出来它的方法签名。
*/
SEL handleTransition = NSSelectorFromString(@"handleNavigationTransition:");
/**
* 创建一个与系统一模一样的手势，我们只把它的类改为UIPanGestureRecognizer
*/
[popRecognizer addTarget:navigationInteractiveTransition action:handleTransition];
#endif
}
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
/**
* 这里有两个条件不允许手势执行，1、当前控制器为根控制器；2、如果这个push、pop动画正在执行（私有属性）
*/
return self.viewControllers.count != 1 && ![[self valueForKey:@"_isTransitioning"] boolValue];
}
@end
//
// NavigationInteractiveTransition.h
// UIScreenEdgePanGestureRecognizer
//
// Created by Jazys on 15/3/30.
// Copyright (c) 2015年 Jazys. All rights reserved.
// 专门处理交互对象
#import <UIKit/UIKit.h>
@class UIViewController, UIPercentDrivenInteractiveTransition;
@interface NavigationInteractiveTransition : NSObject <UINavigationControllerDelegate>
- (instancetype)initWithViewController:(UIViewController *)vc;
- (void)handleControllerPop:(UIPanGestureRecognizer *)recognizer;
- (UIPercentDrivenInteractiveTransition *)interactivePopTransition;
@end
//
// NavigationInteractiveTransition.m
// UIScreenEdgePanGestureRecognizer
//
// Created by Jazys on 15/3/30.
// Copyright (c) 2015年 Jazys. All rights reserved.
//
#import "NavigationInteractiveTransition.h"
#import "PopAnimation.h"
@interface NavigationInteractiveTransition ()
@property (nonatomic, weak) UINavigationController *vc;
@property (nonatomic, strong) UIPercentDrivenInteractiveTransition *interactivePopTransition;
@end
@implementation NavigationInteractiveTransition
- (instancetype)initWithViewController:(UIViewController *)vc
{
self = [super init];
if (self) {
self.vc = (UINavigationController *)vc;
self.vc.delegate = self;
}
return self;
}
/**
* 我们把用户的每次Pan手势操作作为一次pop动画的执行
*/
- (void)handleControllerPop:(UIPanGestureRecognizer *)recognizer {
/**
* interactivePopTransition就是我们说的方法2返回的对象，我们需要更新它的进度来控制Pop动画的流程，我们用手指在视图中的位置与视图宽度比例作为它的进度。
*/
CGFloat progress = [recognizer translationInView:recognizer.view].x / recognizer.view.bounds.size.width;
/**
* 稳定进度区间，让它在0.0（未完成）～1.0（已完成）之间
*/
progress = MIN(1.0, MAX(0.0, progress));
if (recognizer.state == UIGestureRecognizerStateBegan) {
/**
* 手势开始，新建一个监控对象
*/
self.interactivePopTransition = [[UIPercentDrivenInteractiveTransition alloc] init];
/**
* 告诉控制器开始执行pop的动画
*/
[self.vc popViewControllerAnimated:YES];
}
else if (recognizer.state == UIGestureRecognizerStateChanged) {
/**
* 更新手势的完成进度
*/
[self.interactivePopTransition updateInteractiveTransition:progress];
}
else if (recognizer.state == UIGestureRecognizerStateEnded || recognizer.state == UIGestureRecognizerStateCancelled) {
/**
* 手势结束时如果进度大于一半，那么就完成pop操作，否则重新来过。
*/
if (progress > 0.5) {
[self.interactivePopTransition finishInteractiveTransition];
}
else {
[self.interactivePopTransition cancelInteractiveTransition];
}
self.interactivePopTransition = nil;
}
}
- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController
animationControllerForOperation:(UINavigationControllerOperation)operation
fromViewController:(UIViewController *)fromVC
toViewController:(UIViewController *)toVC {
/**
* 方法1中判断如果当前执行的是Pop操作，就返回我们自定义的Pop动画对象。
*/
if (operation == UINavigationControllerOperationPop)
return [[PopAnimation alloc] init];
return nil;
}
- (id<UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController
interactionControllerForAnimationController:(id<UIViewControllerAnimatedTransitioning>)animationController {
/**
* 方法2会传给你当前的动画对象animationController，判断如果是我们自定义的Pop动画对象，那么就返回interactivePopTransition来监控动画完成度。
*/
if ([animationController isKindOfClass:[PopAnimation class]])
return self.interactivePopTransition;
return nil;
}
@end
//
// popAnimation.h
// UIScreenEdgePanGestureRecognizer
//
// Created by Jazys on 15/3/25.
// Copyright (c) 2015年 Jazys. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@interface PopAnimation : NSObject <UIViewControllerAnimatedTransitioning>
@end
//
// popAnimation.m
// UIScreenEdgePanGestureRecognizer
//
// Created by Jazys on 15/3/25.
// Copyright (c) 2015年 Jazys. All rights reserved.
//
#import "PopAnimation.h"
@interface PopAnimation ()
@property (nonatomic, strong) id <UIViewControllerContextTransitioning> transitionContext;
@end
@implementation PopAnimation
- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
//这个方法返回动画执行的时间
return 0.25;
}
/**
* transitionContext你可以看作是一个工具，用来获取一系列动画执行相关的对象，并且通知系统动画是否完成等功能。
*/
- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext {
/**
* 获取动画来自的那个控制器
*/
UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
/**
* 获取转场到的那个控制器
*/
UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
/**
* 转场动画是两个控制器视图时间的动画，需要一个containerView来作为一个“舞台”，让动画执行。
*/
UIView *containerView = [transitionContext containerView];
[containerView insertSubview:toViewController.view belowSubview:fromViewController.view];
NSTimeInterval duration = [self transitionDuration:transitionContext];
/**
* 执行动画，我们让fromVC的视图移动到屏幕最右侧
*/
[UIView animateWithDuration:duration animations:^{
fromViewController.view.transform = CGAffineTransformMakeTranslation([UIScreen mainScreen].bounds.size.width, 0);
}completion:^(BOOL finished) {
/**
* 当你的动画执行完成，这个方法必须要调用，否则系统会认为你的其余任何操作都在动画执行过程中。
*/
[transitionContext completeTransition:!transitionContext.transitionWasCancelled];
}];
// _transitionContext = transitionContext;
//----------------pop动画一-------------------------//
/*
[UIView beginAnimations:@"View Flip" context:nil];
[UIView setAnimationDuration:duration];
[UIView setAnimationDelegate:self];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:containerView cache:YES];
[UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:)];
[UIView commitAnimations];//提交UIView动画
[containerView exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
*/
//----------------pop动画二-------------------------//
/*
CATransition *tr = [CATransition animation];
tr.type = @"cube";
tr.subtype = @"fromLeft";
tr.duration = duration;
tr.removedOnCompletion = NO;
tr.fillMode = kCAFillModeForwards;
tr.delegate = self;
[containerView.layer addAnimation:tr forKey:nil];
[containerView exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
*/
}
- (void)animationDidStop:(CATransition *)anim finished:(BOOL)flag {
[_transitionContext completeTransition:!_transitionContext.transitionWasCancelled];
}
@end
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