iOS 开发 右滑返回上一级控制器

#import <objc/runtime.h>

@interface UINavigationController (Transition)<UIGestureRecognizerDelegate>

- (void)transitionPanGestureDidLoad;

@end

@interface DLNavigationTransition ()

@end

@implementation DLNavigationTransition

/**

*  启动右滑pop

*/

+ (void)enableNavigationTransitionWithPanGestureBack

{

static dispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

Method viewDidLoadMethod = class_getInstanceMethod([UINavigationController class], @selector(viewDidLoad));

Method transitionPanGestureDidLoadMethod = class_getInstanceMethod([UINavigationController class], @selector(transitionPanGestureDidLoad));

method_exchangeImplementations(viewDidLoadMethod, transitionPanGestureDidLoadMethod);

});

}

@end

@implementation UINavigationController (Transition)

- (void)transitionPanGestureDidLoad

{

if ([self isKindOfClass:[UINavigationController class]])

{

[self transitionPanGestureDidLoad];

//1.获取系统interactivePopGestureRecognizer对象的target对象

id target = self.interactivePopGestureRecognizer.delegate;

//2.创建滑动手势，taregt设置interactivePopGestureRecognizer的target，所以当界面滑动的时候就会自动调用target的action方法。

//handleNavigationTransition是私有类_UINavigationInteractiveTransition的方法，系统主要在这个方法里面实现动画的。

UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] init];

[pan addTarget:target action:NSSelectorFromString(@"handleNavigationTransition:")];

//3.设置代理

pan.delegate = self;

//4.添加到导航控制器的视图上

[self.view addGestureRecognizer:pan];

//5.禁用系统的滑动手势

self.interactivePopGestureRecognizer.enabled = NO;

}

}

#pragma mark - 滑动开始会触发

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer

{

UIPanGestureRecognizer *pan = (UIPanGestureRecognizer *)gestureRecognizer;

CGPoint translat = [pan translationInView:pan.view];

if (translat.x < 0 ) {

return NO;

}

//只有导航的根控制器不需要右滑的返回的功能。

if (self.viewControllers.count <= 1)

{

return NO;

}

return YES;

}

@end

//直接上代码  等你来拷贝