快速将选择器的委托和数据源外包给另一个类

Question

I am creating more than one picker in one view controller, so I have to use separate cocoa touch classes to handle the datasource and delegate methods of each of them. I have this code:

myPicker.delegate = CustomPickerViewController

myPicker.dataSource = CustomPickerViewController

In this case, CustomPickerViewController is a cocoa touch class in a separate file which has the required UIPickerViewDelegate and UIPickerViewDataSource methods implemented. So, what should I be assigning to the above properties in order to handle populating a picker view using the CustomPickerViewController class?

Answer 1

Each picker should get its own instance of CustomPickerViewController .

myPicker.delegate = CustomPickerViewController()
myPicker.dataSource = myPicker.delegate

anotherPicker.delegate = CustomPickerViewController()
anotherPicker.dataSource = anotherPicker.delegate