所以，如果您从类别开始......

Question

从我可以收集的内容来看，无法将View Controller动画用作Segue转换。目前，我在现有项目中有一组View Controller动画，可在视图控制器之间创建动画过渡。例如：

模态动画.h文件：

//
//  MVModalDismissAnimation.h
//

#import "MVBaseAnimation.h"

@interface MVModalAnimation : MVBaseAnimation

@end

模态动画.m文件：

//
//  MVModalDismissAnimation.m
//

#import "MVModalAnimation.h"

@implementation MVModalAnimation {
UIView *_coverView;
NSArray *_constraints;
}

#pragma mark - Animated Transitioning

-(void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
//The view controller's view that is presenting the modal view
UIView *containerView = [transitionContext containerView];

if (self.type == AnimationTypePresent) {
    //The modal view itself
    UIView *modalView = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey].view;

    //View to darken the area behind the modal view
    if (!_coverView) {
        _coverView = [[UIView alloc] initWithFrame:containerView.frame];
        _coverView.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.6];
        _coverView.alpha = 0.0;
    } else _coverView.frame = containerView.frame;
    [containerView addSubview:_coverView];

    //Using autolayout to position the modal view
    modalView.translatesAutoresizingMaskIntoConstraints = NO;
    [containerView addSubview:modalView];
    NSDictionary *views = NSDictionaryOfVariableBindings(containerView, modalView);
    _constraints = [[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-30-[modalView]-30-|" options:0 metrics:nil views:views] arrayByAddingObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-30-[modalView]-30-|" options:0 metrics:nil views:views]];
    [containerView addConstraints:_constraints];

    //Move off of the screen so we can slide it up
    CGRect endFrame = modalView.frame;
    modalView.frame = CGRectMake(endFrame.origin.x, containerView.frame.size.height, endFrame.size.width, endFrame.size.height);
    [containerView bringSubviewToFront:modalView];

    //Animate using spring animation
    [UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0 usingSpringWithDamping:0.8 initialSpringVelocity:1.0 options:0 animations:^{
        modalView.frame = endFrame;
        _coverView.alpha = 1.0;
    } completion:^(BOOL finished) {
        [transitionContext completeTransition:YES];
    }];
} else if (self.type == AnimationTypeDismiss) {
    //The modal view itself
    UIView *modalView = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey].view;

    //Grab a snapshot of the modal view for animating
    UIView *snapshot = [modalView snapshotViewAfterScreenUpdates:NO];
    snapshot.frame = modalView.frame;
    [containerView addSubview:snapshot];
    [containerView bringSubviewToFront:snapshot];
    [modalView removeFromSuperview];

    //Set the snapshot's anchor point for CG transform
    CGRect originalFrame = snapshot.frame;
    snapshot.layer.anchorPoint = CGPointMake(0.0, 1.0);
    snapshot.frame = originalFrame;

    //Animate using keyframe animation
    [UIView animateKeyframesWithDuration:[self transitionDuration:transitionContext] delay:0.0 options:0 animations:^{
        [UIView addKeyframeWithRelativeStartTime:0.0 relativeDuration:0.15 animations:^{
            //90 degrees (clockwise)
            snapshot.transform = CGAffineTransformMakeRotation(M_PI * -1.5);
        }];
        [UIView addKeyframeWithRelativeStartTime:0.15 relativeDuration:0.10 animations:^{
            //180 degrees
            snapshot.transform = CGAffineTransformMakeRotation(M_PI * 1.0);
        }];
        [UIView addKeyframeWithRelativeStartTime:0.25 relativeDuration:0.20 animations:^{
            //Swing past, ~225 degrees
            snapshot.transform = CGAffineTransformMakeRotation(M_PI * 1.3);
        }];
        [UIView addKeyframeWithRelativeStartTime:0.45 relativeDuration:0.20 animations:^{
            //Swing back, ~140 degrees
            snapshot.transform = CGAffineTransformMakeRotation(M_PI * 0.8);
        }];
        [UIView addKeyframeWithRelativeStartTime:0.65 relativeDuration:0.35 animations:^{
            //Spin and fall off the corner
            //Fade out the cover view since it is the last step
            CGAffineTransform shift = CGAffineTransformMakeTranslation(180.0, 0.0);
            CGAffineTransform rotate = CGAffineTransformMakeRotation(M_PI * 0.3);
            snapshot.transform = CGAffineTransformConcat(shift, rotate);
            _coverView.alpha = 0.0;
        }];
    } completion:^(BOOL finished) {
        [_coverView removeFromSuperview];
        [containerView removeConstraints:_constraints];
        [transitionContext completeTransition:YES];
    }];
}
}

-(NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext {
if (self.type == AnimationTypePresent) return 1.0;
else if (self.type == AnimationTypeDismiss) return 1.75;
else return [super transitionDuration:transitionContext];
}

@end

上面从底部向上滑动模态视图控制器。

我现在想将其转换为使用故事板和segues。

我还想要转换其他四种类型的动画，那么是否有一种简单的方法可以让上面的类与segue过渡一起工作？

Answer 1

我可能会误解你，但这里有一个用自定义segue的例子...

@interface TestSegue : UIStoryboardSegue

@end

@implementation TestSegue
-(void)perform
    {
    UIView *sv = ((UIViewController *)self.sourceViewController).view;
    UIView *dv = ((UIViewController *)self.destinationViewController).view;

    UIWindow *window = [[[UIApplication sharedApplication] delegate] window];
    [window insertSubview:dv aboveSubview:sv];
    [dv enterRight:0.1 then:^
        {
        [self.sourceViewController
           presentViewController:self.destinationViewController
           animated:NO completion:nil];
        }];

    }
@end

注意我的日常工作＆＃34; enterRight：＆＃34;只是UIView上的一个类别

使用自定义segues的方便教程... http://www.bencz.com/hacks/2014/02/07/custom-ios-segues-in-xcode-5/

我在UIView上的类别示例，它只是视图的动画动画......

请注意，你必须拥有＆＃34;＆＃34;＆＃34;阻止，以便能够在自定义segue中使用它。

注意 - 这里有一个完整的解释，即对于那些不熟悉https://stackoverflow.com/a/20760583/294884的人来说，将块作为属性（注意这是所有目标-c）

-(void)enterRight:(float)delay then:(void(^)(void))after
    {
    CGPoint moveTo = self.center;
    CGPoint moveFrom = self.center;

    CGFloat simpleOffscreen = [UIScreen mainScreen].bounds.size.width;

    moveFrom.x = moveFrom.x + simpleOffscreen;

    self.center = moveFrom;
    self.hidden = NO;

    [UIView animateWithDuration:0.5
        delay:delay
        usingSpringWithDamping:0.4
        initialSpringVelocity:0.1
        options:0
        animations:^
            {
            self.center = moveTo;
            }
        completion:^(BOOL finished)
            {
            if (after) after();
            }
        ];
    }

所以，如果您从类别开始......

在Xcode中单击以添加新文件，然后选择类别。有两个方框

所以，一个类别是＆＃34; on＆＃34;一些课。在这种情况下，它是＆＃34; on＆＃34; UIView的。在底部框中，输入UIView。

在顶部框中，只需输入一些方便，简短的名称。事实上，使用的名称并不重要。例如，典型的选择是＆＃34; Utility＆＃34; ＆＃34;助手＆＃34; ＆＃34;技巧＆＃34; ＆＃34;动画及＃34;或类似的。

现在转到.h文件并添加它，

-(void)enterRight:(float)delay then:(void(^)(void))after;

现在转到.m文件并添加上面的函数。您现在可以在代码中的任何位置使用该功能。这是使用它的一个例子......

-(void)viewDidLoad
    {
    [super viewDidLoad];
    [PFAnalytics trackEvent:@"harvestFBPage"];

    [self.slideOff showMessage:@"Next step..."];
    [self.slideOff enterRight:0.0 then:nil];
    }

所以，对于任何UIView，你可以去[anyUIView enterRight...];这很棒。在示例中，self.slideOff是一个UIView。

请注意，在该示例中，之后没有任何事情要做。＆＃34;这是＆＃34;之后要做的事情的一个例子＆＃34;。

-(void)viewDidLoad
    {
    [super viewDidLoad];
    [PFAnalytics trackEvent:@"harvestFBPage"];

    [self.slideOff showMessage:@"Next step..."];
    [self.slideOff enterRight:0.0 then:^
        {
        NSLog(@"do this afterwards!");
        self.slideOff.alpha = 0.5;
        etc;
        etc;
        }];
    }

希望有助于分类。如果你不熟悉block作为objective-c中的参数，请不要忘记去https://stackoverflow.com/a/20760583/294884！（并投票！:)）

回到问题和...

不可能在自定义segue中使用任何类型的动画，除非包含的概念＆＃34;完成后运行此块，＆＃34;因为你必须发消息presentViewController :(动画：否）仅在你完成时。

这是关键。

希望它有所帮助，对不起，如果我误解了你的问题。

Answer 2

UIStoryBoardSegue是一个包装过渡动画并在Storyboards中神奇地显示的对象。可以在自定义segue中使用自定义视图控制器Transition Animation 。

假设您已经有一个实现UIViewControllerAnimatedTransitioning协议的自定义动画对象（如上所述），您需要：

创建自定义segue以包装动画师并通过继承UIStoryBoardSegue

使其在故事板中可用

@interface MYCustomAnimationSegue : UIStoryboardSegue<UIViewControllerTransitioningDelegate>
@end

实现perform:方法，将其设置为transitioningdelegate（用于模态转换）或者作为navigationController的委托（用于推送或替换转换）

@implementation MYCustomAnimationSegue

- (void)perform {
    UIViewController *sourceVC = (UIViewController *)self.sourceViewController;
    UIViewController *destVC = (UIViewController *)self.destinationViewController;

    //Set the transitioningdelegate (for a modal transition)
    destVC.transitioningDelegate = self;

    //strong property, necessary to retain the Segue after perform: is finished
    //only needed if you want the customSegue to be the transitioningDelegate
    sourceVC.customSegue = self;

    //Set the modalPresentationStyle
    if (&UITransitionContextFromViewKey) {
        //iOS8
        destVC.modalPresentationStyle = UIModalPresentationFullScreen;
    } else {
        //iOS7
        destVC.modalPresentationStyle = UIModalPresentationCustom;
    }

    //Call the presentation
    [sourceVC presentViewController:destVC animated:YES completion:^{
        //release ourselves again
        sourceVC.customSegue = nil;
    }];
}

@end

实现UIViewControllerTransitioningDelegate方法以返回自定义动画对象

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

    return [[MyCustomAnimator alloc] init];
}

当您从一个视图控制器拖动到另一个视图控制器时，您的自定义segue类现在将显示在Interface Builder中。

在你兴奋之前，有一点需要注意：这只适用于一个方向。为了使其适用于Unwind Segues，您的viewcontroller类需要实现necessary methods。

如何将视图控制器动画转换转换为Segue动画转换

2 个答案:

所以，如果您从类别开始......