我正在创建一个闹钟应用。当点击UITextField
时,我想在UIActionSheet
中显示UIDatePicker
。
我正在创建一个闹钟应用。当点击UITextField
时,我想在UIActionSheet
中显示UIDatePicker
。
要做到这一点,您需要实现UIActionShetDelegate
和UITextFieldDelegate
。在textFieldDidBeginEditing
中,您需要像下面这样显示操作表:
-(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)];
}
我发现,当使用文本字段和选择器时,最好只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。确保你已经设置了 "UITextFieldDelegate" 和 picker 方法,然后像这样连接它。
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];
如果你更喜欢使用操作表,那么以下是基本设置:
UIDatePicker
设置为UITextField
的输入视图(@property inputView
)。操作表只能包含按钮。