此視頻顯示我遇到的問題。 http://www.youtube.com/watch?v=C9od_2KZAbsiOS 7使用UINavigationController自定義轉換
我正在嘗試使用UIPanGestureRecognizer創建自定義交互式推送轉換。我有一個交互式轉換委託(使用UIPercentDrivenInteractiveTransition)和一個轉換動畫師。 completeTransition:似乎不必要地重新推動推動。
這裏是移動手勢如何控制過渡:
- (void) panGestureRecognized:(UIPanGestureRecognizer *) gestureRecogznier {
CGPoint translation = [gestureRecogznier translationInView:gestureRecogznier.view];
if (gestureRecogznier.state == UIGestureRecognizerStateBegan) {
self.interactiveTransitionAnimator = [[UIPercentDrivenInteractiveTransition alloc] init];
EVDetailViewController *detailViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"EVDetailViewController"];
[self.navigationController pushViewController:detailViewController animated:YES];
}
else if (gestureRecogznier.state == UIGestureRecognizerStateChanged) {
CGFloat d = (translation.x/CGRectGetWidth(self.view.bounds)) * -1;
[self.interactiveTransitionAnimator updateInteractiveTransition:d];
}
else if (gestureRecogznier.state == UIGestureRecognizerStateEnded) {
if ([gestureRecogznier velocityInView:self.view].x < 0) {
[self.interactiveTransitionAnimator finishInteractiveTransition];
} else {
[self.interactiveTransitionAnimator cancelInteractiveTransition];
}
self.interactiveTransitionAnimator = nil;
}
}
的UINavigationControllerDelegate同時處理過渡委託對象,這是當pushViewController觸發的自動售貨機:被調用。
過渡動畫師有一個非常簡單的動畫:
- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
[[transitionContext containerView] addSubview:toViewController.view];
CGRect finalToVCFrame = [transitionContext finalFrameForViewController:toViewController];
if (self.operation == UINavigationControllerOperationPush) {
// set offscreen to the right
toViewController.view.frame = CGRectMake(320.0f, 0.0f, 320.0f, 568.0f);
[UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0f options:0 animations:^{
toViewController.view.frame = finalToVCFrame;
} completion:^(BOOL finished) {
// *** When this is called, the glitch occurs
[transitionContext completeTransition:YES];
}];
}
}
在視頻中,泛手勢結束的通過的方式,這會觸發finishInteractiveTransition呼叫約60%。一切順利,直到UIView基於塊的動畫中的完成塊調用completeTransition :.當調用此方法時,toViewController會不必要地重新動畫推動動畫的最後部分。在視頻中,紅色視圖是窗口。動畫持續時間是3秒。
我不明白爲什麼會發生這種情況。它看起來像手勢結束時和completeTransition:被調用兩次之間的動畫。有任何想法嗎?
哇謝謝你! –