如何为UIPickerView设置数据？

Question

我正在尝试添加PickerView - 但我看到一个黑屏......我做错了什么???

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

    [self.view addSubview:myPickerView];

Answer 1

实施UIPickerViewDataSource方法：

– numberOfComponentsInPickerView:
– pickerView:numberOfRowsInComponent:

和UIPickerViewDelegate方法：

– pickerView:titleForRow:forComponent:

不要忘记设置属性：

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，记得放：

<UIPickerViewDelegate, UIPickerViewDataSource>

我通常使用填充字符串的NSMutableArray来填写数据。希望有所帮助！