ios:简单弹出视图动画

1.使用coreanimation 来实现

2.示例代码如下

//使用CAAnimationGroup
        //1.不透明度的变化
        CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
        opacityAnimation.fromValue = @0.;
        opacityAnimation.toValue = @1.;
        opacityAnimation.duration = 0.5f;
        
        //2.大小的变化
        CAKeyframeAnimation *scaleAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
        //确定变化的情况
        CATransform3D startingScale = CATransform3DScale(self.view.layer.transform, 0, 0, 0);
        CATransform3D overshootScale = CATransform3DScale(self.view.layer.transform, 1.05, 1.05, 1.0);
        CATransform3D undershootScale = CATransform3DScale(self.view.layer.transform, 0.97, 0.97, 1.0);
        CATransform3D endingScale = self.view.layer.transform;
        
        NSMutableArray *scaleValues = [NSMutableArray arrayWithObject:[NSValue valueWithCATransform3D:startingScale]];
        //第二个动画的时间
        NSMutableArray *keyTimes = [NSMutableArray arrayWithObject:@0.0f];
        //添加到group里面
        NSMutableArray *timingFunctions = [NSMutableArray arrayWithObject:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]];
        [scaleValues addObjectsFromArray:@[[NSValue valueWithCATransform3D:overshootScale], [NSValue valueWithCATransform3D:undershootScale]]];
//        时间累计
        [keyTimes addObjectsFromArray:@[@0.5f, @0.85f]];
//        可以为每个动画设置不同的动画方式
        [timingFunctions addObject:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
//        最后结束的情况
        [scaleValues addObject:[NSValue valueWithCATransform3D:endingScale]];
        [keyTimes addObject:@1.0f];
        [timingFunctions addObject:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
        
//        赋值
        scaleAnimation.values = scaleValues;
//        注意keytimes时间差
        scaleAnimation.keyTimes = keyTimes;
        scaleAnimation.timingFunctions = timingFunctions;
//        CAAnimationGroup
        CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
        animationGroup.animations = @[scaleAnimation, opacityAnimation];
        animationGroup.duration = 0.6;
        
        [self.view.layer addAnimation:animationGroup forKey:nil];

3.demo链接

http://pan.baidu.com/s/1eQiTlNs