對UITabBarController上TabBar按鈕動畫詳細介紹-->>保證你有意外收獲,如有問題歡迎指點。。
廢話就不多說了直接上效果圖,這是我公司項目中加的動畫,自己可以適當的加以修改稱自己想要的

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item {
NSInteger index = [self.tabBar.items indexOfObject:item];
if (self.indexFlag != index) {
[self animationWithIndex:index];
}
}
// 動畫
- (void)animationWithIndex:(NSInteger) index {
NSMutableArray * tabbarbuttonArray = [NSMutableArray array];
for (UIView *tabBarButton in self.tabBar.subviews) {
if ([tabBarButton isKindOfClass:NSClassFromString(@"UITabBarButton")]) {
[tabbarbuttonArray addObject:tabBarButton];
}
}
CABasicAnimation*pulse = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
pulse.timingFunction= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
pulse.duration = 0.08;
pulse.repeatCount= 1;
pulse.autoreverses= YES;
pulse.fromValue= [NSNumber numberWithFloat:0.7];
pulse.toValue= [NSNumber numberWithFloat:1.3];
[[tabbarbuttonArray[index] layer]
addAnimation:pulse forKey:nil];
self.indexFlag = index;
}