*我们在使用模态视图的时候 全屏显示 和 下滑返回 不能同时兼得，这时需要我们处理滑动手势过程，引入 SwipeDismiss 可以最快速的实现这一需求,效果图如下（最下方附demo）：
87_1690191340.gif
*使用 SwipeDismiss
需要下滑返回的 ViewCointroller.m 遵循: UIViewControllerTransitioningDelegate。
#import "SwipeDismissController.h"
#import "DismissAnimation.h"
#import "PresentedAnimation.h"
#import "SwipeUpInteractiveTransition.h"
@interface SwipeDismissController ()<UIViewControllerTransitioningDelegate>
@property (nonatomic, strong) SwipeUpInteractiveTransition *interactiveTransition;
@end
@implementation SwipeDismissController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor orangeColor];
self.interactiveTransition = [[SwipeUpInteractiveTransition alloc]init:self];
self.transitioningDelegate = self;
}
#pragma mark === UIViewControllerTransitioningDelegate ======
-(id<UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source {
return [[PresentedAnimation alloc]init];
}
-(id<UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed {
return [[DismissAnimation alloc]init];
}
-(id<UIViewControllerInteractiveTransitioning>)interactionControllerForDismissal:(id<UIViewControllerAnimatedTransitioning>)animator {
return (self.interactiveTransition.isInteracting ? self.interactiveTransition : nil);
}
@end
