突出读沿着文字（在iPhone一个童话式的应用程序） [英] Highlight Read-Along Text (in a storybook type app for iPhone)

问题描述

我喜欢这个功能（当然，我的儿子喜欢它），我想实现在一个孩子的书应用程序我做的iPhone，但我一无所知从哪里开始。我使用cocos2d的所有动画精灵/过渡的东西，但我不知道如何，因为它叙述接近高亮显示文本。

I love this feature (well, my son loves it), and I would like to implement it in a kid's book app I am doing for iPhone, but I'm clueless where to begin. I'm using Cocos2d for all the animated sprite/transition stuff, but I'm not sure how to approach highlighting text as it is narrated.

例：杰克和吉尔，喝他们填充，太醉去水。作为文本叙述（每一页上的.mp3饰演），文本将被高亮显示。认为我调查的Core Animation，但在这一点上我米更熟悉Cocs2d（云林最好）。

Example: "Jack and Jill, drank their fill, and were too drunk to go for water." As the text is narrated (.mp3 plays on each page), the text would be highlighted. I considered investigating Core animation, but I"m more familiar with Cocs2d at this point (tenuously at best).

如果有人有线索，我真的AP preciate它。

If someone has a clue, I'd really appreciate it.

Brendang

推荐答案

使用的<一个href=\"http://developer.apple.com/iphone/library/documentation/UIKit/Reference/NSString_UIKit_Additions/Reference/Reference.html\"相对=nofollow> <$ C C> UIStringDrawing 方法来决定所需彰显RECT，然后放置一个半透明<$ C $ç>的UIView （或任何cocos2d的使用）的文本视图下。通过的NSTimer

Use the UIStringDrawing methods to determine the rect needed for the highlight, and then position a semitransparent UIView (or whatever cocos2d uses) under your text view. Synchronize with your audio via NSTimer

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