你好,我的应用程序会响应触摸事件并进行视图动画。如果用户非常快速,并在当前动画正在进行时进行另一个触摸操作,则一切都会混乱。
框架是否提供了处理此问题的标准方法?或者我使用了错误的动画方式?
目前,它检查一个标志(animationInProgress)来处理此问题,但我想知道是否必须这样做?
以下是代码:
- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
NSMutableArray *c = (NSMutableArray*)context;
UINavigationController *nc = [c objectAtIndex:0];
[nc.view removeFromSuperview];
animationInProgress = NO;
}
- (void)transitionViews:(BOOL)topToBottom {
if (animationInProgress) {
return;
}
animationInProgress = YES;
NSMutableArray *context = [[NSMutableArray alloc] init];
[UIView beginAnimations:@"myanim" context:context];
[UIView setAnimationDuration:0.7f];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
UIViewController *from;
UIViewController *to;
if (navController3.view.superview == nil ) {
from = navController2;
to = navController3;
} else {
from = navController3;
to = navController2;
}
int height;
if (topToBottom) {
height = -1 * from.view.bounds.size.height;
} else {
height = from.view.bounds.size.height;
}
CGAffineTransform transform = from.view.transform;
[UIView setAnimationsEnabled:NO];
to.view.bounds = from.view.layer.bounds;
to.view.transform = CGAffineTransformTranslate(transform, 0, height);
[window addSubview:to.view];
[UIView setAnimationsEnabled:YES];
from.view.transform = CGAffineTransformTranslate(from.view.transform, 0, -1 * height);
to.view.transform = transform;
[context addObject:from];
[UIView commitAnimations];
return;
}