Three20中给TTPhotoViewController添加播放按钮
by Elton on 2010年02月6日, under iPhone
Three20是一个很不错的iPhone类库，是facebook共享出来的框架。利用TTThumbsViewController可以很容易的制作出类似flickr的应用,实现缩略图和图片查看功能。
但是默认的TTThumbsViewController，点击一个图片的时候，下面的button只有上一个和下一个，并没有播放按钮。 之前以为Three20没有相应的播放功能。但是经过查看代码，发现在TTPhotoViewController中，其实有相关的方法，只是没有把播放按钮显示出来而已。
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UIBarButtonItem* playButton = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:
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UIBarButtonSystemItemPlay target:self action:@selector(playAction)] autorelease];
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playButton.tag = 1;
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通过修改TTPhotoViewController大致在400行左右，添加playButton这个变量
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_toolbar.items = [NSArray arrayWithObjects:
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space, _previousButton, space, playButton, space, _nextButton, space, nil];
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这样重新编译后，就可以看到播放按钮了。
Three20这个库其实还是很实用的，只是文档比较欠缺，没办法，只能直接看源码了。
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