iphone - 按下 IBAction 后确定 PickerView 值

Question

我有一个 iOS UiPicker 可以处理我想要的值，并且可以使用以下代码检测何时选择了新选项:

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {

    NSString *aCompany = [arrayColour objectAtIndex:[pickerView selectedRowInComponent:0]];

    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"Picked:"
                          message:aCompany
                          delegate:nil
                          cancelButtonTitle:@"Okay"
                          otherButtonTitles:nil];

    [alert show];


}

我的问题是如何在按下这样的按钮后从选择器中获取最新信息:

- (IBAction)DoneButton:(id)sender {



    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"Picked:"
                          message:aCompany
                          delegate:nil
                          cancelButtonTitle:@"Okay"
                          otherButtonTitles:nil];

    [alert show];

}

Answer 1

将您的 pickerView 设置为 IBOutlet(并使用 IB 链接)，然后您可以在 didSelectRow 之外访问它。

@property (nonatomic) IBOutlet UIPickerView *myPickerView;

然后您可以在DoneButton 中使用以下行:

NSString *aCompany = [arrayColour objectAtIndex:[self.myPickerView selectedRowInComponent:0]];