iOS-86-添加右滑返回事件

最新推荐文章于 2023-10-30 21:05:32 发布

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#iOS #右滑 #返回 #UINavigationControll #事件

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本文介绍如何通过创建UINavigationController的分类来实现全屏的手势返回功能，避免了与左侧返回手势的冲突，并且禁用了默认的边缘触发手势。

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很简单：建一个UINavigationController分类：

.h文件：

#import <UIKit/UIKit.h>

@interface UINavigationController (RightBack) <UIGestureRecognizerDelegate>

@end

.m文件：

#import "UINavigationController+RightBack.h"

@implementation UINavigationController (RightBack)


-(void)viewDidLoad{
    [super viewDidLoad];
    //
    id target = self.interactivePopGestureRecognizer.delegate;
    //
    SEL handler = NSSelectorFromString(@"handleNavigationTransition:");
    //  获取添加系统边缘触发手势的View
    UIView *targetView = self.interactivePopGestureRecognizer.view;
    
    //  创建pan手势 作用范围是全屏
    UIPanGestureRecognizer * fullScreenGes = [[UIPanGestureRecognizer alloc]initWithTarget:target action:handler];
    fullScreenGes.delegate = self;
    [targetView addGestureRecognizer:fullScreenGes];
    
    // 关闭边缘触发手势 防止和原有边缘手势冲突
    [self.interactivePopGestureRecognizer setEnabled:NO];
    


}


//  防止导航控制器只有一个rootViewcontroller时触发手势
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    UIPanGestureRecognizer *rr = (UIPanGestureRecognizer *)gestureRecognizer;
    //解决与左滑手势冲突
    CGPoint translation = [rr translationInView:gestureRecognizer.view];
    if (translation.x <= 0) {
        return NO;
    }
    return self.childViewControllers.count == 1 ? NO : YES;
}


@end