iOS tabbar点击动画效果实现

正常情况下,我们点击tabbar都只有一个变色效果,但有时候,如果我们想给它添加一个点击动画,该如何做呢?

先上几个效果图:

1、先放大,再缩小                     2、Z轴旋转

             

3、Y轴位移                          4、放大并保持

           

原理:利用UITabBarController实现,在tabbar的 didSelectItem 代理里添加动画效果。

 

 

下面就以上几种场景贴上代码:

准备代码:

@interface MainTabbarVC ()<UITabBarControllerDelegate>
@property (nonatomic,assign) NSInteger  indexFlag;  //记录上一次点击tabbar,使用时,记得先在init或viewDidLoad里 初始化 = 0
@end

-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item{ NSInteger index = [self.tabBar.items indexOfObject:item]; if (index != self.indexFlag) { //执行动画 NSMutableArray *arry = [NSMutableArray array]; for (UIView *btn in self.tabBar.subviews) { if ([btn isKindOfClass:NSClassFromString(@"UITabBarButton")]) { [arry addObject:btn]; } } //添加动画
     //---将下面的代码块直接拷贝到此即可---
self.indexFlag = index; } }

 

1、先放大,再缩小

//放大效果,并回到原位
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
//速度控制函数,控制动画运行的节奏
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.duration = 0.2;       //执行时间
animation.repeatCount = 1;      //执行次数
animation.autoreverses = YES;    //完成动画后会回到执行动画之前的状态
animation.fromValue = [NSNumber numberWithFloat:0.7];   //初始伸缩倍数
animation.toValue = [NSNumber numberWithFloat:1.3];     //结束伸缩倍数
[[arry[index] layer] addAnimation:animation forKey:nil];

 

2、Z轴旋转

//z轴旋转180度
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
//速度控制函数,控制动画运行的节奏
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.duration = 0.2;       //执行时间
animation.repeatCount = 1;      //执行次数
animation.removedOnCompletion = YES;
animation.fromValue = [NSNumber numberWithFloat:0];   //初始伸缩倍数
animation.toValue = [NSNumber numberWithFloat:M_PI];     //结束伸缩倍数
[[arry[index] layer] addAnimation:animation forKey:nil];

 

3、Y轴位移

//向上移动
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.translation.y"];
//速度控制函数,控制动画运行的节奏
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.duration = 0.2;       //执行时间
animation.repeatCount = 1;      //执行次数
animation.removedOnCompletion = YES;
animation.fromValue = [NSNumber numberWithFloat:0];   //初始伸缩倍数
animation.toValue = [NSNumber numberWithFloat:-10];     //结束伸缩倍数
[[arry[index] layer] addAnimation:animation forKey:nil];

 

4、放大并保持

//放大效果
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
//速度控制函数,控制动画运行的节奏
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.duration = 0.2;       //执行时间
animation.repeatCount = 1;      //执行次数
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;           //保证动画效果延续
animation.fromValue = [NSNumber numberWithFloat:1.0];   //初始伸缩倍数
animation.toValue = [NSNumber numberWithFloat:1.15];     //结束伸缩倍数
[[arry[index] layer] addAnimation:animation forKey:nil];
//移除其他tabbar的动画
for (int i = 0; i<arry.count; i++) {
    if (i != index) {
        [[arry[i] layer] removeAllAnimations];
    }
}

 

此外,如果想定制其他动画效果,还可以从下面属性里自己定制动画

 

 

谢谢!~

 

posted @ 2017-01-17 09:45  那一抹风情  阅读(7950)  评论(0编辑  收藏  举报