Kindle reader是如何实现的? - V2EX
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dongsheng
V2EX    iDev

Kindle reader是如何实现的?

  •  
  •   dongsheng 2012-04-03 20:12:42 +08:00 4476 次点击
    这是一个创建于 5013 天前的主题,其中的信息可能已经有所发展或是发生改变。
    最近研究了一下阅读类的apps,instapaper和readability应该是用的UIWebView,自己做了下实验,去掉UIWebView上下的两个阴影,然后对html添加了针对mobile的几个属性基本上很有native的感觉了。但还是搞不清这些eBooks reader,比如Kindle reader,是如何实现的横向翻页?难道是用CSS和Javascript实现的?
    7 条回复    1970-01-01 08:00:00 +08:00
    dongsheng
        1
    dongsheng  
    OP
       2012-04-03 20:38:45 +08:00
    又折腾了一下,发现给UIScrollView设置pagingEnabled为YES以后就能实现竖向的翻页了,但还是想不通怎么实现横向翻页。。。
    run2
        2
    run2  
       2012-04-03 20:45:55 +08:00
    @dongsheng 之前大概研究过,貌似比较笨的方法是 根据字体大小计算出每页显示多少字,然后来截取,不知道有什么比较快捷的方法不
    dongsheng
        3
    dongsheng  
    OP
       2012-04-03 21:00:18 +08:00
    @sobigfish 这个行不通吧,比如段落中断行就不好算啊
    ant_sz
        4
    ant_sz  
       2012-04-04 00:52:41 +08:00
    确定是HTML出来的?
    jerry
        5
    jerry  
       2012-04-04 14:58:05 +08:00
    看到一篇文章说这个,还没测试 http://b.imi.im/?p=388
    dongsheng
        6
    dongsheng  
    OP
       2012-04-04 16:01:48 +08:00
    @jerry UITextView算不出正确大小是因为它的样式跟UILabel不同sizeWithFont算出来的的结果只能用于UILabel。

    kindle和ibooks之类的应该用的不是UITextView,epub文件本质上就是HTML,UITextView和UILabel都无法直接渲染HTML的。
    liwei
        7
    liwei  
       2012-04-06 11:53:34 +08:00 via iPad
    自己解析和渲染HTML就是啦
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