使用willTransitionToState在uitableviewcell中为textlabel设置动画 [英] animate textlabel in uitableviewcell using willTransitionToState

问题描述

当我按下编辑按钮时，我试图在UItableviewcell中设置textlabel的动画。
我试图让它淡出并淡入。
淡入效果但是当我按下'编辑'时，文本标签消失了，当我按下'完成'时，我完全淡入。

I am trying to animate the textlabel in a UItableviewcell when I press the edit button. I am trying to make it fade out and fade in. fading in works but when I press 'edit' the textlabel disappears and when I press on 'done' I fades in just perfectly.

有谁可以告诉我它为什么不起作用？

Can anyone tell me why it isn't working?

提前感谢

- (void)willTransitionToState:(UITableViewCellStateMask)state {
 [super willTransitionToState:state];

 if ((state & UITableViewCellStateEditingMask) || (state & UITableViewCellStateShowingDeleteConfirmationMask)) {
  [UIView beginAnimations:nil context:NULL];
  [UIView setAnimationDuration:0.3];
  label.alpha = 0.0;
  [UIView commitAnimations];
 }
}

- (void)didTransitionToState:(UITableViewCellStateMask)state {
 [super didTransitionToState:state];

 if (!(state & UITableViewCellStateEditingMask) && !(state & UITableViewCellStateShowingDeleteConfirmationMask)) {
  [UIView beginAnimations:nil context:NULL];
  [UIView setAnimationDuration:0.5];
  label.alpha = 1.0;
  [UIView commitAnimations];
 }
}

推荐答案

我注意到当输入willTransitionToState时动画被禁用。以下修正了它。

I noticed that when entering willTransitionToState that animations were disabled. The following fixed it.

- (void)willTransitionToState:(UITableViewCellStateMask)state
{
    [super willTransitionToState:state];

    //Should be enabled by default...but apparently not
    [UIView setAnimationsEnabled:YES];
...
}

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