iphone怎么实现左滑返回
更新时间:2023-10-30
答案:可以通过在UINa vigationController中设置interactivePopGestureRecognizer的delegate来实现左滑返回功能。具体步骤如下:1. 在UINa vigationController的子类中设置interactivePopGestureRecognizer的delegate为自己。2. 实现UIGestureRecognizerDelegate协议中的gestureRecognizerShouldBegin方法,判断当前是否可以进行左滑返回操作。3. 在需要支持左滑返回的UIViewController中设置na vigationController的delegate为UINa vigationController的子类。示例代码如下:```// UINa vigationController的子类@interface CustomNa vigationController : UINa vigationController @end@implementation CustomNa vigationController- (void)viewDidLoad { [super viewDidLoad]; // 设置interactivePopGestureRecognizer的delegate为自己 self.interactivePopGestureRecognizer.delegate = self;}#pra gma mark - UIGestureRecognizerDelegate- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer { // 判断当前是否可以进行左滑返回操作 return self.viewControllers.count > 1;}@end// 需要支持左滑返回的UIViewController@interface CustomViewController : UIViewController@end@implementation CustomViewController- (void)viewDidLoad { [super viewDidLoad]; // 设置na vigationController的delegate为CustomNa vigationController的子类 self.na vigationController.delegate = (CustomNa vigationController *)self.na vigationController;}@end```