[UIView numberOfComponentsInPickerView:]: unrecognized selector sent to instance
2013-01-30 15:01
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今天写Picker View的小Demo竟然莫名其妙报错了，折腾了半天也没搞明白为什么。后来才知道是Picker View的dataSource 和 delegate 连接错了，应该在xib中连接File's Owner而不是View……
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