iOS - Animation之ViewAnimation

这里不仅有present和dismiss在viewController中跳转，还有各种动画push和pop，当然view的动画出场也是必不可少的。拿了直接用即可，简单粗暴看代码，这里可以让你知其然，知其所以然。

PresentAnimation

实现UIViewControllerTransitioningDelegate的代理方法，把present从下面出来的view从右边动画出来，具体代码看github代码，具体方法如下：

-(NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext{
return 1.0;
}
-(void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext{
 UIViewController * fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UIViewController * toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIView *containerView =  [transitionContext containerView];
UIView *fromView = nil;
UIView *toView = nil;

if ([transitionContext respondsToSelector:@selector(viewForKey:)]) {
    fromView = [transitionContext viewForKey:UITransitionContextFromViewKey];
    toView = [transitionContext viewForKey:UITransitionContextToViewKey];
}else{
    fromView = fromViewController.view;
    toView = toViewController.view;
}
BOOL isPresent = (toViewController.presentingViewController == fromViewController);
CGRect fromFrame = [transitionContext initialFrameForViewController:fromViewController];
CGRect toFrame = [transitionContext finalFrameForViewController:toViewController];
if (isPresent) {
    fromView.frame = fromFrame;
    toView.frame = CGRectOffset(toFrame, toFrame.size.width, 0);
    [containerView addSubview:toView];
}  
NSTimeInterval transitionDuration = [self transitionDuration:transitionContext];
[UIView animateWithDuration:transitionDuration animations:^{
    if (isPresent) {
        toView.frame = toFrame;
        fromView.frame = CGRectOffset(fromFrame, fromFrame.size.width*0.3*-1, 0);
    }
} completion:^(BOOL finished) {
    BOOL isCancelled = [transitionContext transitionWasCancelled];
    if (isCancelled)
        [toView removeFromSuperview]; 
    [transitionContext completeTransition:!isCancelled];
}];

}

• (id<UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source{
  

return (id)[[PresentAnimation alloc]init];
}

DismissAnimation

- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext{
return 1.0;
}
-(void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext{
UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

UIView *containerView = [transitionContext containerView];
UIView *fromView = nil;
UIView *toView = nil;

if ([transitionContext respondsToSelector:@selector(viewForKey:)]) {
    fromView = [transitionContext viewForKey:UITransitionContextFromViewKey];
    toView = [transitionContext viewForKey:UITransitionContextToViewKey];
}else{
    fromView = fromViewController.view;
    toView = toViewController.view;
}

BOOL isDismiss = (fromViewController.presentingViewController == toViewController);   
CGRect fromFrame = [transitionContext initialFrameForViewController:fromViewController];
CGRect toFrame = [transitionContext finalFrameForViewController:toViewController];

if (isDismiss) {
    fromView.frame = fromFrame;
    toView.frame = CGRectOffset(toFrame, toFrame.size.width*0.3*-1, 0);
    [containerView insertSubview:toView belowSubview:fromView];
}
NSTimeInterval transitionDuration = [self transitionDuration:transitionContext];
[UIView animateWithDuration:transitionDuration animations:^{
    if (isDismiss) {
        toView.frame = toFrame;
        fromView.frame = CGRectOffset(fromFrame, fromFrame.size.width, 0);
    }
} completion:^(BOOL finished) {
    BOOL isCancel = [transitionContext transitionWasCancelled];
    if (isCancel) {
        [toView removeFromSuperview];
    }
    [transitionContext completeTransition:!isCancel];
}];
}

- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed {
return (id)[[DismissAnimation alloc]init];
  }

PushAnimation

动画添加新的view，type和subType不同，动画方式就不一样。这里只写一个不累赘

 +(void)pushView:(UIView *)View subView:(UIView *)subView AndAnimationType:(NSString *)type AndsubType:(NSString *)subType{  
CATransition *transition = [CATransition animation];
transition.duration = 1.0f;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = type;
transition.subtype = subType;
[View.layer addAnimation:transition forKey:@"pushTransitionAnimation"];
[View addSubview:subView];
  }

PopAnimation

动画移除新的view

 +(void)popView:(UIView *)View subView:(UIView *)subView AndAnimationType:(NSString *)type AndsubType:(NSString *)subType {
CATransition *transition = [CATransition animation];
transition.duration = 1.0f;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = type;
transition.subtype = subType;
[View.superview.layer addAnimation:transition forKey:@"popTransitionAnimation"];
[subView removeFromSuperview];
 }

注：关于CATransition的type和subType的介绍，前两篇博客已经介绍过，看Animation_CATransition这篇。

ScaleViewAnimation

CGAffineTransform 主要用于形变，位移和旋转，可用于动画展示

transform属性介绍，这里介绍最常用和好用的，其他属性去看CGAffineTransform

• 位移X,Y

    CGAffineTransformMakeTranslation(CGFloat tx, CGFloat ty)
  

• 伸缩X,Y

    CGAffineTransformMakeScale(CGFloat sx, CGFloat sy)
  

• 旋转M_PI

    CGAffineTransformMakeRotation(CGFloat angle)
  

• 组合

    CGAffineTransformConcat(CGAffineTransform t1,CGAffineTransform t2)
  

• 回到原位

    CGAffineTransformIdentity
  

动画调用，包括动画时间，动画完成后回调

 -(void)scaleView:(UIView *)view CGFloatX:(CGFloat)x CGFloatY:(CGFloat)y CGFloatW:(CGFloat)w CGFloatH:(CGFloat)h{
CGFloat scaleW = self.window.frame.size.width / w;
CGFloat scaleH = self.window.frame.size.height / h;
CGFloat W = scaleW * 50 - 50 - x;
CGFloat H = scaleH * 50 - 50 - y;
[UIView animateWithDuration:1.0 animations:^{
    view.transform =CGAffineTransformConcat(CGAffineTransformMakeScale(scaleW, scaleH), CGAffineTransformMakeTranslation(W,H));
} completion:^(BOOL finished) {
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        view.transform = CGAffineTransformIdentity;
    });
  }];

}

Dome: github地址