在点击UITextField时在UIActionSheet中显示UIDatePicker

Question

我正在创建报警应用程序.我想UIDatePicker在UIActionSheet点击时显示UITextField.

Answer 1

为此,您需要实现UIActionShetDelegate并UITextFieldDelegate 在textFieldDidBeginEditing您需要显示操作表,如:

-(void)textFieldDidBeginEditing:(UITextField *)sender
{
  [self showAction];
}
-(void) showAction
{
  UIActionSheet *asheet = [[UIActionSheet alloc] initWithTitle:@"Pick the date." delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Select", nil];
  [asheet showInView:[self.view superview]];
  [asheet setFrame:CGRectMake(0, 117, 320, 383)];
  [asheet release];
}

- (void)willPresentActionSheet:(UIActionSheet *)actionSheet
  {

    UIDatePicker *pickerView = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 40, 320, 216)];

   //Configure picker...
   [pickerView setMinuteInterval:5];
   [pickerView setTag: kDatePickerTag];

  //Add picker to action sheet
  [actionSheet addSubview:pickerView];

  [pickerView release];

  //Gets an array af all of the subviews of our actionSheet
  NSArray *subviews = [actionSheet subviews];

  [[subviews objectAtIndex:SelectButtonIndex] setFrame:CGRectMake(20, 266, 280, 46)];
  [[subviews objectAtIndex:CancelButtonIndex] setFrame:CGRectMake(20, 317, 280, 46)];

}

Answer 2

我发现当使用带拾取器的文本字段时,最简单的方法就是设置文本字段的输入视图并添加自己的工具栏以方便使用.确保你有你的"UITextFieldDelegate"和选择器方法设置,然后像这样挂钩.

 yourtextfield.delegate = self;
 [yourtextfield setInputView:yourpickerview];
 [yourtextfield setInputAccessoryView:doneBar];

 doneBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
 [doneBar setBarStyle:UIBarStyleBlackTranslucent];
 UIBarButtonItem *spacer2 = [[UIBarButtonItem alloc] 
                initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
                target:nil
                action:nil];
 [doneBar setItems: [NSArray arrayWithObjects:spacer2, [[UIBarButtonItem alloc] 
                    initWithTitle:@"Done"
                    style:UIBarButtonItemStyleDone
                    target:yourtextfield 
                    action:@selector(resignFirstResponder)],nil ] animated:YES];

但如果您更喜欢使用操作表,那么这是基本设置:

在操作表中添加UIPickerView和按钮 - 如何？