UIPickerView reloadData

问题

I'm changing components (in particular, the number and color of components), in a UIPickerView that I call pickerOne, so after making the changes, I call:

[pickerOne reloadData];

and it appears to be working perfectly however, I'm getting a compile warning:

warning: 'UIPickerView' may not respond to '-reloadData'

Although this appears to work, is there something else that I should use to reload data?

Thanks

回答1:

I think you should be using:

reloadComponent:

or

reloadAllComponents:

回答2:

You should be calling reloadComponent: or reloadAllComponents:.

There may be a private reloadData used under the covers, but it's not part of the public API, and therefore, shouldn't be relied upon.

回答3:

I think you should be using: reloadComponent or reloadAllComponents.

But these methods are useless unless you connect UIPickerViewDalegate and UIPickerViewDataSource to file owner.

来源：https://stackoverflow.com/questions/3206924/uipickerview-reloaddata