QMUIImagePreviewViewTransitionAnimator

@interface QMUIImagePreviewViewTransitionAnimator
    : NSObject <UIViewControllerAnimatedTransitioning>

负责处理 QMUIImagePreviewViewController 被 present/dismiss 时的动画，如果需要自定义动画效果，可按需修改 animationEnteringBlock、animationBlock、animationCompletionBlock。

See

QMUIImagePreviewViewController.transitioningAnimator

imagePreviewViewController
当前图片预览控件的引用，在为 QMUIImagePreviewViewController.transitioningAnimator 赋值时会自动建立这个引用关系
Declaration
Objective-C

@property (nonatomic, weak) QMUIImagePreviewViewController *_Nullable imagePreviewViewController;
Swift

weak var imagePreviewViewController: QMUIImagePreviewViewController? { get set }


                    
                    
                    duration

转场动画的持续时长，默认为 0.25

Declaration

Objective-C

@property (nonatomic) NSTimeInterval duration;

Swift

var duration: TimeInterval { get set }

cornerRadiusMaskLayer
当 sourceImageView 本身带圆角时，动画过程中会通过这个 layer 来处理圆角的动画
Declaration
Objective-C

@property (nonatomic, strong, readonly) CALayer *_Nonnull cornerRadiusMaskLayer;
Swift

var cornerRadiusMaskLayer: CALayer { get }


                    
                    
                    animationEnteringBlock

动画开始前的准备工作可以在这里做

Declaration

Objective-C

@property (nonatomic, copy) void (^_Nonnull) (__kindof QMUIImagePreviewViewTransitionAnimator *_Nonnull, BOOL, QMUIImagePreviewViewControllerTransitioningStyle, CGRect, QMUIZoomImageView *_Nonnull, id<UIViewControllerContextTransitioning> _Nullable) animationEnteringBlock;

Swift

var animationEnteringBlock: (QMUIImagePreviewViewTransitionAnimator, Bool, QMUIImagePreviewViewControllerTransitioningStyle, CGRect, QMUIZoomImageView, UIViewControllerContextTransitioning?) -> Void { get set }

Parameters

`animator`	当前的动画器 animator
`isPresenting`	YES 表示当前正在 present，NO 表示正在 dismiss
`style`	当前动画的样式
`sourceImageRect`	原界面上显示图片的 view 在 imagePreviewViewController.view 坐标系里的 rect，仅在 style 为 zoom 时有值，style 为 fade 时为 CGRectZero
`zoomImageView`	当前图片
`transitionContext`	转场动画的上下文，可通过它获取前后界面、动画容器等信息


                    
                    
                    animationBlock

转场时的实际动画内容，整个 block 会在一个 UIView animation block 里被调用，因此直接写动画内容即可，无需包裹一个 animation block

Declaration

Objective-C

@property (nonatomic, copy) void (^_Nonnull) (__kindof QMUIImagePreviewViewTransitionAnimator *_Nonnull, BOOL, QMUIImagePreviewViewControllerTransitioningStyle, CGRect, QMUIZoomImageView *_Nonnull, id<UIViewControllerContextTransitioning> _Nullable) animationBlock;

Swift

var animationBlock: (QMUIImagePreviewViewTransitionAnimator, Bool, QMUIImagePreviewViewControllerTransitioningStyle, CGRect, QMUIZoomImageView, UIViewControllerContextTransitioning?) -> Void { get set }

Parameters

`animator`	当前的动画器 animator
`isPresenting`	YES 表示当前正在 present，NO 表示正在 dismiss
`style`	当前动画的样式
`sourceImageRect`	原界面上显示图片的 view 在 imagePreviewViewController.view 坐标系里的 rect，仅在 style 为 zoom 时有值，style 为 fade 时为 CGRectZero
`zoomImageView`	当前图片
`transitionContext`	转场动画的上下文，可通过它获取前后界面、动画容器等信息


                    
                    
                    animationCompletionBlock

动画结束后的事情，在执行完这个 block 后才会调用 [transitionContext completeTransition:]

Declaration

Objective-C

@property (nonatomic, copy) void (^_Nonnull) (__kindof QMUIImagePreviewViewTransitionAnimator *_Nonnull, BOOL, QMUIImagePreviewViewControllerTransitioningStyle, CGRect, QMUIZoomImageView *_Nonnull, id<UIViewControllerContextTransitioning> _Nullable) animationCompletionBlock;

Swift

var animationCompletionBlock: (QMUIImagePreviewViewTransitionAnimator, Bool, QMUIImagePreviewViewControllerTransitioningStyle, CGRect, QMUIZoomImageView, UIViewControllerContextTransitioning?) -> Void { get set }

Parameters

`animator`	当前的动画器 animator
`isPresenting`	YES 表示当前正在 present，NO 表示正在 dismiss
`style`	当前动画的样式
`sourceImageRect`	原界面上显示图片的 view 在 imagePreviewViewController.view 坐标系里的 rect，仅在 style 为 zoom 时有值，style 为 fade 时为 CGRectZero
`zoomImageView`	当前图片
`transitionContext`	转场动画的上下文，可通过它获取前后界面、动画容器等信息