HYBControllerTransitions是自定义围场动画API封装类库,使用简便。使用者不需要了解太多转场动画知识,即可轻松接入项目使用。
这是一个给开发者们提供自定义push、pop、dismiss和present转场动画的开源组件。现在库中支持泡泡放大缩小围场、模态半屏转场和移动切换转场(KeyNote某转场效果)。对于开发者们来说,这是一个很不错的开源库。开发者不需要了解转场知识,只需要简单一个API就可以实现对应的功能。
如果想要更深入地学习,请在源码中查看对应的注释说明!
在设计此类库时,希望以最简洁的API来实现转场功能。如果不懂任何转场知识的人,也能轻松使用,那才算达到目标。
因此,如果您没有学习过相关转场方面的知识,请不要担心,这个类库不需要您掌握太多转场的知识,只需要懂基本的OC语法即可轻松接入项目使用。
公共的属性及API都封装在HYBBaseTransition类型中,它遵守了需要实现转场的所有协议并实现之。如果目前类库中所提供的效果不满足您的需求,您可以直接继承于HYBBaseTransition于实现您希望得到的效果。
默认转场动画使用的不是弹簧动画效果,如果觉得弹簧动画效果更佳,仅需要设置为YES即可。
/** * Default is NO, if set to YES, it will be presented and dismissed with * spring animation. */ @property (nonatomic, assign) BOOL animatedWithSpring;
当然,使用到弹簧自然需要设置其参数。不过作者都提供有默认值,都是经过调试过得到的值。如果觉得默认值所得到的效果不够好,请自行调整参数:
/** * The initial Spring velocity, Only when animatedWithSpring is YES, it will take effect. * Default is 1.0 / 0.5. If you don't know, just use the default value. */ @property (nonatomic, assign) CGFloat initialSpringVelocity; /** * The Spring damp, Only when animatedWithSpring is YES, it will take effect. * * Default is 0.5. If you don't know, just use the default value. */ @property (nonatomic, assign) CGFloat damp;
目前所支持的动画效果有以下:
present时,以泡泡圆形放大;dismiss时,以泡泡圆形缩小至起点。当需要实现此转场效果时,请使用HYBBubbleTransition类型。效果图如下:
使用起来非常简单,只需要一个API且只在一处调用即可。比如,现在有HYBModalBubbleViewController,它有一个点击事件,在点击后会回调onPresent函数,然后配置如下即可实现转场:
- (void)onPresent { HYBBubbleFromBottomController *vc = [[HYBBubbleFromBottomController alloc]init]; vc.modalPresentationStyle = UIModalPresentationCustom; // Remember to own it strongly // Because delegate is weak reference, and it will be released after out of the function body. self.bubbleTransition = [[HYBBubbleTransition alloc]initWithPresented:^(UIViewController *presented, UIViewController *presenting, UIViewController *source, HYBBaseTransition *transition) { // You need to cast type to the real subclass type. HYBBubbleTransition *bubble = (HYBBubbleTransition *)transition; // If you want to use Spring animation, set to YES. // Default is NO. // bubble.animatedWithSpring = YES; bubble.bubbleColor = presented.view.backgroundColor; // 由于一个控制器有导航,一个没有,导致会有64的误差,所以要记得处理这种情况 CGPoint center = [self.viewviewWithTag:1010].center; center.y += 64; bubble.bubbleStartPoint = center; }dismissed:^(UIViewController *dismissed, HYBBaseTransition *transition) { // Do nothing and it is ok here. // If you really want to do something, here you can set the mode. // But inside the super class, it is set to be automally. // So you do this has no meaning. transition.transitionMode = kHYBTransitionDismiss; }]; vc.transitioningDelegate = self.bubbleTransition; [selfpresentViewController:vcanimated:YEScompletion:NULL]; }
这里会present HYBBubbleFromBottomController这个控制器类,但是HYBBubbleFromBottomController对象什么也不需要做,就可以直接实现了转场。
是不是真的很简单呢?
如果想要了解更多功能功能,请在源代码中查看类中所提供的所有公开属性,几乎都有默认值,若不需要修改,直接使用默认值就可以了。
注意事项:一定要将代理设置为对应的转场类对象。而且一定要在当前控制器强引用该转场类对象,因为设置为转场代理,只是弱使用,如果没有强引用,它就会被释放掉:
// 代理不再是设置为self,而是设置为转场对象 vc.transitioningDelegate = self.bubbleTransition;
当需要实现半屏呈现且带缩放效果的转场动画时,可以使用此HYBModalTransition类。它仅支持present/dismiss模式。它提供了更多的属性设置,稍候讲解。效果如下:
使用非常简单。假设在HYBModalHalfController有一个点击事件,点击后会回调onPresent函数,只需要在此函数中实现即可:
- (void)onPresent { HYBModalHalfDetailController *vc = [[HYBModalHalfDetailController alloc]init]; self.transition = [[HYBModalTransition alloc]initWithPresented:^(UIViewController *presented, UIViewController *presenting, UIViewController *source, HYBBaseTransition *transition) { HYBModalTransition *modal = (HYBModalTransition *)transition; modal.scale = (CGPoint){0.95, 0.95}; // If you don't specify, it will use default value // modal.presentedHeight = 350.0; // If you don't want to, set to YES or do no set. modal.shouldDismissOnTap = YES; // Default is NO, if set to YES, it will use spring animation. modal.animatedWithSpring = YES; // Default is YES. including navigation bar when take snapshots. // When has navigation bar, if set to NO, it looks not so good. // modal.scapshotIncludingNavigationBar = NO; }dismissed:^(UIViewController *dismissed, HYBBaseTransition *transition) { // do nothing // 注释掉也没有关系,内部已经自动设置了。 transition.transitionMode = kHYBTransitionDismiss; }]; vc.transitioningDelegate = self.transition; [selfpresentViewController:vcanimated:YEScompletion:NULL]; }
对于HYBModalHalfDetailController控制器类,什么也不需要操作。这是不是有点太过于简单了?对于dismissed这个block,其实这里完全可以设置为nil,因为不需要做任何操作,默认就自动设置了mode。
如果当前控制器类有导航,最好还是连导航条也一起生成截图,这样效果会好很多。默认就是YES。如果不希望如此,请手动设置为N:
/** * Whether to include navigation bar when take snapshots. * Default is YES. If NO, it has only the presenting view. */ @property (nonatomic, assign) BOOL scapshotIncludingNavigationBar;
在弹出来之后,默认是添加了点击手势,可以自动dismiss。默认为YES,如果不希望如此,请手动设置为NO:
/** * When tap on the presenting view, should it automatically is dismissed. * * Default is YES. */ @property (nonatomic, assign) BOOL shouldDismissOnTap;
都提供了默认值,但是如果想要调整到一个让您满意的效果,也许这些属性就可以帮助您实现:
/** * Make the from view scale to the specified scale. * * Default is (0.9, 0.9) */ @property (nonatomic, assign) CGPoint scale; /** * The height for destination view to present. * * Default is half of destination view, it means desView.frame.size.height / 2 */ @property (nonatomic, assign) CGFloat presentedHeight;
类似于KeyNote的神奇移动效果push、pop动画。效果图如下:
使用起来也是很简单的,不同于present/dismiss模式,由于push的时候还不能得到转场过去的目标视图,比如效果图中的切换过去后看到的图片控件。在创建控制器类的时候,控件是不存在的,因此只能使用其它的办法来实现。
这里所采用的方案是通过给UIViewController添加扩展属性,如此就可以在创建UI的地方,将目标控件赋值。扩展所添加的属性为:
/** * Set a target view to show. When push, it will transition to * the target view. and when poped, it will pop from the target view. */ @property (nonatomic, strong, nonnull) UIView *hyb_toTargetView;
假设当前控制器类为HYBMoveViewController,它有一个collectionview,呈风格布局显示一个图片列表。当点击cell的时候,就切换(push)到HYBMoveDetailController控制器中显示更多内容。
实现如下:
- (void)collectionView:(UICollectionView *)collectionViewdidSelectItemAtIndexPath:(NSIndexPath *)indexPath { HYBMoveDetailController *vc = [[HYBMoveDetailController alloc]init]; HYBGridModel *model = self.datasource[indexPath.item]; vc.image = model.clipedImage; self.transition = [[HYBMoveTransition alloc]initWithPushed:^(UIViewController *fromVC, UIViewController *toVC, HYBBaseTransition *transition) { HYBMoveTransition *move = (HYBMoveTransition *)transition; HYBGridCell *cell = (HYBGridCell *)[collectionViewcellForItemAtIndexPath:indexPath]; move.targetClickedView = cell.imageView; move.animatedWithSpring = YES; }poped:^(UIViewController *fromVC, UIViewController *toVC, HYBBaseTransition *transition) { // Do nothing, unless you really need to. }]; self.navigationController.delegate = self.transition; [self.navigationControllerpushViewController:vcanimated:YES]; }
在点击的时候,需要创建一个转场对象,然后我们将导航类的代理设置为这个转场对象,如下:
self.navigationController.delegate = self.transition;
这样就可以实现内部自动处理了。当push的时候,会回调pushed闭包,在这里返回了转场对象,需要提供相关属性设置,才能实现。一定要传targetClickedView属性,这是被点击的控件,也是用于切换效果用的。
在HYBMoveDetailController控制器中,在viewDidLoad这里创建UI的地方,创建了一个图片控件,然后如些设置:
// You must specify a target view with this. self.hyb_toTargetView = imgView;
OK,到此就实现好功能了!
是否足够简单?
支持pod,可直接使用pod添加以下代码到Podfile中:
pod 'HYBControllerTransitions', '~> 1.0.0'
如果您的工程不支持Pod,呆直接将HYBControllerTransitions目录放到您的工程中即可!
如果不想使用pod来安装,或者想要看看demo,请到此处下载: HYBControllerTransitions
非常感谢 andreamazz ,学习了很多他的开源作品!
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