- 学习一个新类看这个类的头文件是唯一了解它的途径,进入头文件首先看它的父类和初始化方法:
![](https://img.haomeiwen.com/i2120387/4048d6f76fb3d869.png)
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它的父类是UIView它的初始化方法也就继承了UIView,<>中签订NSCoding和UITableViewDataSource协议,它也具有字符串拷贝和tableView等方法下面实现一个简单的UIPickView:
![](https://img.haomeiwen.com/i2120387/edf7851c735333f8.png)
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设置代理人和一些属性
![](https://img.haomeiwen.com/i2120387/3bc6f511400f6797.png)
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设置代理
![](https://img.haomeiwen.com/i2120387/d4e97d224e435d49.png)
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显示选中框和刷新属性
![](https://img.haomeiwen.com/i2120387/32b05de9c159fe0c.png)
E1990F9B-A508-48F2-A795-5DD21C999551.png
设置数组数据
![](https://img.haomeiwen.com/i2120387/257b63e4d5b02707.png)
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实现协议方法设置有几列
![](https://img.haomeiwen.com/i2120387/177cd142a2f2a707.png)
AA8FB3C8-5E8D-4229-99D5-7451738C36A0.png
指定列的行数(制定第一列,只有5行)
![](https://img.haomeiwen.com/i2120387/137ffad7a282b008.png)
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设置显示内容
![](https://img.haomeiwen.com/i2120387/5de259a740fcaae7.png)
70A5F098-58E7-40D4-9771-E808DD5EEB76.png
设置显示字体的颜色
![](https://img.haomeiwen.com/i2120387/bb1aa833ab051629.png)
9D7ABAA3-51AB-4182-B408-1AB890B48CAF.png
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