如何在iPad中显示UIDatePicker？
我在 iPhone 中实现了 UIDatePicker，它工作正常。
我在 iPad 上尝试了相同的代码，但它没有向我显示 UIDatePicker。
我在某处读到我需要用 UIPopOverController 显示它并找到 这个 链接，但它没有显示正确的代码。
我无法为此创建一个单独的 XIB。我必须通过代码本身来实现它。 我的是IOS5。
我使用以下代码：
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
if (textField.tag == 1)
{
[self showDatePickerIniPad];
}
}
-(void)showDatePickerIniPad
{
UIViewController *popoverContent = [[UIViewController alloc] init];
UIView *popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
popoverView.backgroundColor = [UIColor whiteColor];
datePicker.frame = CGRectMake(0, 0, 320, 300);
[popoverView addSubview:datePicker];
popoverContent.view = popoverView;
popoverContent.contentSizeForViewInPopover = CGSizeMake(320, 244);
UIPopoverController *popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
[popoverController presentPopoverFromRect:CGRectZero inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
txt_FromDate.inputView = datePicker;
}
I implemented the UIDatePicker in iPhone and it's working correctly.
The same code I tried with iPad but it is not showing me UIDatePicker.
I read somewhere that I need to show it with UIPopOverController and find this
link but it is not showing the proper code.
I can't make a separate XIB for that. I have to implement it by code itself.
Mine is IOS5.
I use the following code:
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
if (textField.tag == 1)
{
[self showDatePickerIniPad];
}
}
-(void)showDatePickerIniPad
{
UIViewController *popoverContent = [[UIViewController alloc] init];
UIView *popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
popoverView.backgroundColor = [UIColor whiteColor];
datePicker.frame = CGRectMake(0, 0, 320, 300);
[popoverView addSubview:datePicker];
popoverContent.view = popoverView;
popoverContent.contentSizeForViewInPopover = CGSizeMake(320, 244);
UIPopoverController *popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
[popoverController presentPopoverFromRect:CGRectZero inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
txt_FromDate.inputView = datePicker;
}
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由于您的问题更多地与学习有关，而不是特定的疑问或问题，因此我发布了教程链接。这 2 个教程应该可以解决您的问题 -
UIPickerView 基础知识
<一个href="http://www.techotopia.com/index.php/Using_the_UIPickerView_and_UIDatePicker_Components_in_iOS_4_iPad_Applications_%28Xcode_4%29" rel="nofollow noreferrer">UIDateView 组件
更新：还要检查这些高度相关的内容来自 stackoverlflow 本身的链接 -
iPad 上 UIActionSheet 中的 UIDatePicker
https://stackoverflow.com/questions/5830585/uidatepicker-inside-uiactionsheet-ipad
iPad 上的空白 UIDatePicker 模式为 UIDatePickerModeDateAndTime
Since your question is more on the lines of learning rather than a specific doubt or question, i am posting tutorial links. These 2 tutorials should solve your problem(s) -
UIPickerView Basics
UIDateView Components
UPDATE: Also check these highly relevant links from stackoverlfow itself -
UIDatePicker in UIActionSheet on iPad
https://stackoverflow.com/questions/5830585/uidatepicker-inside-uiactionsheet-ipad
blank UIDatePicker on iPad in mode UIDatePickerModeDateAndTime
如果您希望在单击文本字段时显示弹出窗口，则您正在使用正确的方法进行操作，
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField。问题是这是一个委托方法textField 因此您应该在 .h 文件的界面中包含UITextFieldDelegate并设置文本字段的委托，如下所示
这应该可以解决您的问题。
If you want the popover to show when you click on the textfield you are doing in the right method,
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField.The problem is this is a Delegate Method for the textField so you should include theUITextFieldDelegatein you interface in the .h fileand set the delegate of you text field like this
That should solve your problem.