查看动画Bug

Question

我使用此代码进行上下查看。

-(void)timeSpanAnimation{    
    const float movementDuration = 0.3f; // tweak as needed   
    int movement = (isDown ? -movementDistance : movementDistance);    
    isDown = (isDown ? false : true);    
    [UIView beginAnimations: nil context: nil];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationBeginsFromCurrentState: YES];

    [UIView setAnimationDuration: movementDuration];
    [UIView setAnimationDelegate:self];
    self.frameDown.frame = CGRectOffset(self.frameDown.frame, 0, movement);
    [self.frameDown setNeedsDisplay];
    [UIView commitAnimations];


}

我在会话开始时（向下看）和会话结束时（向上看）调用此函数。

这项工作做得很好，但是当我改变时间（从iPhone今天到明天的更改时间）或第二天更改时间时，视图不会下降。

感谢。

更新 更改为基于块的动画，当时间更改时仍然有Bug。

-(void)timeSpanAnimation{
    const float movementDuration = 0.3f; // tweak as needed  
    int movement = (isDown ? -movementDistance : movementDistance);   
    isDown = (isDown ? false : true);
    [UIView animateWithDuration:movementDuration
                          delay:0.0f
                        options:UIViewAnimationOptionBeginFromCurrentState | UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         self.frameDown.frame = CGRectOffset(self.frameDown.frame, 0, movement);
                     }
                     completion:nil];
}