# ScreenToLeftandBack

**Repository Path**: ljmlance/ScreenToLeftandBack

## Basic Information

- **Project Name**: ScreenToLeftandBack
- **Description**: gesture right to left ，and back（pop）
- **Primary Language**: Objective-C
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2018-10-19
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# ScreenToLeftandBack
gesture right to left ，and back（pop）

使用 navigationController 进行全局的向右滑动返回

核心代理：
  id target = self.interactivePopGestureRecognizer.delegate;
  SEL handler = NSSelectorFromString(@"handleNavigationTransition:");
  
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];
    
 
 防止导航控制器只有一个rootViewcontroller时触发手势
- (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer {
    // 根据具体控制器对象决定是否开启全屏右滑返回
    for (UIViewController *viewController in self.blackList) {
        if ([self topViewController] == viewController) {
            return NO;
        }
    }
   
    
    if ([[self valueForKey:@"_isTransitioning"] boolValue]) {
        return NO;
    }
    
    // 解决右滑和UITableView左滑删除的冲突
    CGPoint translation = [gestureRecognizer translationInView:gestureRecognizer.view];
    if (translation.x <= 0) {
        return NO;
    }
    
    return self.childViewControllers.count == 1 ? NO : YES;
}