iOS UI进阶-6.0 手势

// 禁用返回手势
- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    
    // 禁用 返回手势
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = NO;
    }
}

// 开启手势
- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    // 开启手势
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
    }
}
// 导航栏返回
- (void)blackBtnClick
{
    // 开启手势，有时只在(void)viewWillDisappear:(BOOL)animated开启，该根栏目下所有的手势都会失效
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
    }
    
    [self.navigationController popToRootViewControllerAnimated:YES];
}