Question

我现在正在实施一个电子书，我必须在播放文本音频时突出显示每个单词。突出显示的颜色将在2秒后消失。我们如何为文本添加背景颜色。我没有使用UILabel，因为有很多句子的冗长文本。我们应该怎么做？有人请帮忙！谢谢！

Answer 1

            I think u should use UIWebView rather than UITextView,  and dynamically u can 
    highlight the text by adding html tags and style tag around a particular string. But
 for that u need to track which string or text audio is playing. Both of these operations
 should be performed simultaneously,i.e., Audio Playing and attaching tags aroynd the tags. 

Now if u want to fade off the color of the text after two seconds , simply call function
after delay of two seconds, in which u can change the text color back to earlier on.
 To call function after delay u should go for

[self performSelector:@selector(changeTooriginalColor) withObject:nil afterDelay:2];

你的第二个问题是aawer：

UIWebView *wizardSpeechWebView = [[UIWebView alloc] initWithFrame:CGRectMake(0,100,320,265)];
wizardSpeechWebView.backgroundColor = [UIColor clearColor];
wizardSpeechWebView.opaque = NO; 
wizardSpeechWebView.delegate = self;
[self.view addSubview:wizardSpeechWebView];

1秒后用淡化动画突出显示文本的背景颜色

1 个答案: