UIView晃动动画

#pragma mark 动画消失
-(void)dismiss
{
    center.y = center.y+self.view.frame.size.height;
    [UIView animateWithDuration: 0.35 animations: ^{
        
        // 获取到当前的View
        
        CALayer *viewLayer = self.shopCarBackView.layer;
        
        // 获取当前View的位置
        
        CGPoint position = viewLayer.position;
        
        // 移动的两个终点位置
        
        CGPoint x = CGPointMake(position.x + 10, position.y);
        
        CGPoint y = CGPointMake(position.x - 10, position.y);
        
        // 设置动画
        
        CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"];
        
        // 设置运动形式
        
        [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault]];
        
        // 设置开始位置
        
        [animation setFromValue:[NSValue valueWithCGPoint:x]];
        
        // 设置结束位置
        
        [animation setToValue:[NSValue valueWithCGPoint:y]];
        
        // 设置自动反转
        
        [animation setAutoreverses:YES];
        
        // 设置时间
        
        [animation setDuration:.06];
        
        // 设置次数
        
        [animation setRepeatCount:5];
        
        // 添加上动画
        
        [viewLayer addAnimation:animation forKey:nil];
        
    } completion: nil];
    
}

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