IOS 自定义tabBar的按钮添加点击放大缩小的动画

// 一句话,写在UITabBarController.m脚本中,tabBar是自动执行的方法

// 点击tabbarItem自动调用
-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
NSInteger index = [self.tabBar.items indexOfObject:item];

[self animationWithIndex:index];

if([item.title isEqualToString:@"发现"])
{
// 也可以判断标题,然后做自己想做的事<img alt="得意" src="http://static.blog.csdn.net/xheditor/xheditor_emot/default/proud.gif" />
}

}
- (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];

}