实现原理是 遍历出imageView，做动画时，添加动画视图，动画结束后隐藏视图
只测试了 iOS11~13，如果有问题请联系我。
interface
#import <Lottie/Lottie.h> @interface CDKTabBarController ()<UITabBarControllerDelegate> /// 关联到 controller 原因：解决快速点击两个不一样的 tabbar 后，需要关闭第一次点击的动画 @property(nonatomic, strong) LOTAnimationView *animationView; @end
implementation
@implementation CDKTabBarController #pragma mark - UITabBarControllerDelegate - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { [self setupAnaimationWithTabBarController:tabBarController selectViewController:viewController]; } #pragma mark - Animation - (void)setupAnaimationWithTabBarController:(UITabBarController *)tabBarController selectViewController:(UIViewController *)viewController { if (self.animationView) { [self.animationView stop]; } //1. NSInteger index = [tabBarController.viewControllers indexOfObject:viewController]; __block NSMutableArray <UIImageView *>*tabBarSwappableImageViews = [NSMutableArray arrayWithCapacity:4]; //2. for (UIView *tempView in tabBarController.tabBar.subviews) { if ([tempView isKindOfClass:NSClassFromString(@"UITabBarButton")]) { //2.1 for (UIImageView *tempImageView in tempView.subviews) { if ([tempImageView isKindOfClass:NSClassFromString(@"UITabBarSwappableImageView")]) { [tabBarSwappableImageViews addObject:tempImageView]; } } } } //3. __block UIImageView *currentTabBarSwappableImageView = tabBarSwappableImageViews[index]; //4. CGRect frame = currentTabBarSwappableImageView.frame; frame.origin.x = 0; frame.origin.y = 0; __block LOTAnimationView *animationView = [self getAnimationViewAtTabbarIndex:index frame:frame]; self.animationView = animationView; animationView.center = currentTabBarSwappableImageView.center; [currentTabBarSwappableImageView.superview addSubview:animationView]; currentTabBarSwappableImageView.hidden = YES; //5. [animationView playFromProgress:0 toProgress:1 withCompletion:^(BOOL animationFinished) { currentTabBarSwappableImageView.hidden = NO; [animationView removeFromSuperview]; animationView = nil; }]; } - (LOTAnimationView *)getAnimationViewAtTabbarIndex:(NSInteger)index frame:(CGRect)frame { // tabbar1 。。。 tabbar3 LOTAnimationView *view = [LOTAnimationView animationNamed:[NSString stringWithFormat:@"tabbar%ld",index+1]]; view.frame = frame; view.contentMode = UIViewContentModeScaleAspectFill; view.animationSpeed = 1; return view; }
来源：博客园
作者：奔丶小康
链接：https://www.cnblogs.com/benxiaokang/p/11585857.html