iOS的几个动画效果
- 粒子发射器
CAEmitterLayer 高性能的粒子引擎
emitterPosition ： 位置
emitterSize ： 大小
emitterMode ：发射的模式
emitterShape ：形状
renderMode ：粒子如何混合。
preservesDepth ：把3D粒子系统平面化
emitterCells ： 添加cell
CAEmitterCell 发射的元素
contents ： 设置图片
birthRate ： 生成速率
lifetime ： 生存时间
lifetimeRange ： 区间
velocity ： 速度
velocityRange ：速度区间
scale ： 放大倍数
scaleRange ： 区间
scaleSpeed ： 放大速度
- UIBezierPath + CAShapeLayer + mask属性 + path动画
- 用UIBezierPath生成开始和结束时的path
- 新建CAShapeLayer并设置显示的path
- 设置mask属性
- 用开始和结束的path做path动画
UIBezierPath *start = [UIBezierPath bezierPathWithOvalInRect:sender.frame];
CGRect rect = CGRectInset(sender.frame, -self.view.frame.size.height, -self.view.frame.size.height);
UIBezierPath *end = [UIBezierPath bezierPathWithOvalInRect:rect];
CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.path = end.CGPath;
maskLayer.fillMode = kCAFillRuleEvenOdd;
_anotherView.layer.mask = maskLayer;
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"path"];
animation.fromValue = (__bridge id)start.CGPath;
animation.toValue = (__bridge id)end.CGPath;
animation.duration = 0.5;
[maskLayer addAnimation:animation forKey:@"path"];
- Controller转场动画： UIViewControllerAnimatedTransitioning协议 + 快照 + 推力重力
新建一个类实现UIViewControllerAnimatedTransitioning协议。
- (NSTimeInterval)transitionDuration:(id)transitionContext
- (void)animateTransition:(id)transitionContext
在要做动画的controller实现协议
代码块
- (id<UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed {
return self.transition;
}
在- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext中做转场动画。
UIView *toV = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey].view;
UIView *fromV = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey].view;
[[transitionContext containerView] addSubview:toV];
[[transitionContext containerView] sendSubviewToBack:toV];
UIView *from = [fromV snapshotViewAfterScreenUpdates:NO];
CGFloat w = fromV.frame.size.width / 20;
CGFloat h = fromV.frame.size.height / 20;
_animator = [[UIDynamicAnimator alloc] initWithReferenceView:[transitionContext containerView]];
NSMutableArray *items = [NSMutableArray array];
for (CGFloat x = 0; x < fromV.frame.size.width; x += w) {
for (CGFloat y = 0; y < fromV.frame.size.height; y += h) {
CGRect frame = CGRectMake(x, y, w, h);
UIView *v = [from resizableSnapshotViewFromRect:frame afterScreenUpdates:NO withCapInsets:UIEdgeInsetsZero];
[[transitionContext containerView] addSubview:v];
v.frame = frame;
[items addObject:v];
UIPushBehavior *push = [[UIPushBehavior alloc] initWithItems:@[v] mode:UIPushBehaviorModeInstantaneous];
push.pushDirection = CGVectorMake([self randomBetween:-0.15 and:0.15], [self randomBetween:-0.15 and:0.15]);
push.active = YES;
[_animator addBehavior:push];
}
}
UIGravityBehavior *gravity = [[UIGravityBehavior alloc] initWithItems:items];
[_animator addBehavior:gravity];
[fromV removeFromSuperview];
[NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(complete) userInfo:nil repeats:NO];
self.transitionContext = transitionContext;
