如何设置ios中的UIPickerView?

目前需要添加一个PickerView，但是运行之后只有黑屏，不知道问题出在哪里？

UIPickerView *myPickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 0, 320, 320)];

    [self.view addSubview:myPickerView];

谢谢指点。

用UIPickerViewDataSource方法:

– numberOfComponentsInPickerView:
– pickerView:numberOfRowsInComponent:

还有UIPickerViewDelegate方法:

– pickerView:titleForRow:forComponent:

然后设置properties:

UIPickerView * myPickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 0, 320, 320)];
myPickerView.delegate = self;
myPickerView.dataSource = self;
[self.view addSubview:myPickerView];

在.h文件中，如下:

<UIPickerViewDelegate, UIPickerViewDataSource>

我以前是用NSMutableArray充填字符串，希望对你有用。