是否可以减慢scrollRangeToVisible的速度？

发布于 2024-12-04 05:14:00 字数 447 浏览 1 评论 0原文

我正在创建一个使用 AVAudioPlayer 播放歌曲的应用程序，并且我设置了一个 textView 在播放歌曲时滚动浏览歌曲的歌词，但我发现的所有滚动选项都会滚动到 textView 大小的底部内容几乎是即时的。有没有办法控制速度？或者，如果我必须在歌曲的持续时间内加载多个scrollRangeToVisible调用，有没有办法让它平滑地动画化，而不是从scrollRangeToVisible调用中从一个点“跳跃”到另一个点？这是我正在使用的代码

scrollPoint.y= [textView.text length];
[textView setContentOffset:scrollPoint animated:YES];

// also tried this
//[textView scrollRangeToVisible:NSMakeRange([textView.text length], 0)];

原文

I'm creating an app that will play a song with AVAudioPlayer, and I setup a textView to scroll through the lyrics of the song as it's playing, but all the scrolling options I've found scroll to the bottom of the size of the textView's contents almost instantaneously. Is there a way to control the speed? Or if I have to load multiple scrollRangeToVisible calls through the duration of the song, is there a way to make it animate smoothly instead of "jumping" from point to point on from the scrollRangeToVisible calls? This is the code I'm using

scrollPoint.y= [textView.text length];
[textView setContentOffset:scrollPoint animated:YES];

// also tried this
//[textView scrollRangeToVisible:NSMakeRange([textView.text length], 0)];

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

紅太極 2024-12-11 05:14:00

如果您将代码放在 UIView 动画块内设置内容偏移量，则可以根据需要设置持续时间。例如，

[UIView animateWithDuration: <duration>
                 animations:^(void) {
                     self.textView.contentOffset = <offset>;
                 }];

不要使用 -[UIScrollView setContentOffset:animated:] 因为这会覆盖块的动画持续时间

If you put your code to set the content offset inside a UIView animation block, you can set the duration as necessary. e.g.

[UIView animateWithDuration: <duration>
                 animations:^(void) {
                     self.textView.contentOffset = <offset>;
                 }];

Don't use -[UIScrollView setContentOffset:animated:] as this will override your block's animation duration

回复收藏 0 原文

~没有更多了~