Question

在我的应用程序中，我想在用户点击按钮时显示UIDatePicker。并且该日期保存到UITextFiled.I完成了这件事。我的问题是当日期选择器出现没有完成按钮时，如何添加完成按钮。到目前为止我试过了。

- (IBAction)pickerAction:(id)sender
{
datePicker.datePickerMode=UIDatePickerModeDate;
datePicker.hidden=NO;
datePicker.date=[NSDate date];
[datePicker addTarget:self action:@selector(TextTitle:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:datePicker];
NSDateFormatter * df = [[NSDateFormatter alloc] init];
[df setDateFormat:@"M-d-yyyy"];
selectedDate.text=[df stringFromDate:datePicker.date];
} 

-(void)TextTitle:(id)sender
{
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:@"M-d-yyyy"];
selectedDate.text = [NSString stringWithFormat:@"%@",
                      [df stringFromDate:datePicker.date]];
 }

如何使用此代码添加完成按钮。请帮帮我。

Answer 1

答案是

datePicker=[[UIDatePicker alloc]init];
datePicker.datePickerMode=UIDatePickerModeDate;
[TextField1 setInputView:datePicker];

UIToolbar *toolBar=[[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 44)];
[toolBar setTintColor:[UIColor grayColor]];
UIBarButtonItem *doneBtn=[[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleBordered target:self action:@selector(ShowSelectedDate)];
UIBarButtonItem *space=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[toolBar setItems:[NSArray arrayWithObjects:space,doneBtn, nil]];

[TextField1 setInputAccessoryView:toolBar];

Answer 2

我为xib中的'done'按钮添加了一个带有UIBarButtonItem的UIToolbar，框架设置为最初不可见（y值等于父视图的高度）。

每次用户访问选择器时，我都会使用动画更改UIDatePicker和UIToolbar的框架（y值），以便它与屏幕底部的选择器一起向上滑动，类似于键盘。 / p>

查看下面的代码。

- (IBAction)showPicker
{
    if(pickerVisible == NO)
    {
        // create the picker and add it to the view
        if(self.datePicker == nil) self.datePicker = [[[UIDatePicker alloc] initWithFrame:CGRectMake(0, 460, 320, 216)] autorelease];
        [self.datePicker setMaximumDate:[NSDate date]];
        [self.datePicker setDatePickerMode:UIDatePickerModeDate];
        [self.datePicker setHidden:NO];
        [self.view addSubview:datePicker];

        // the UIToolbar is referenced 'using self.datePickerToolbar'
        [UIView beginAnimations:@"showDatepicker" context:nil];
        // animate for 0.3 secs.
        [UIView setAnimationDuration:0.3];

        CGRect datepickerToolbarFrame = self.datePickerToolbar.frame;
        datepickerToolbarFrame.origin.y -= (self.datePicker.frame.size.height + self.datePickerToolbar.frame.size.height);
        self.datePickerToolbar.frame = datepickerToolbarFrame;

        CGRect datepickerFrame = self.datePicker.frame;
        datepickerFrame.origin.y -= (self.datePicker.frame.size.height + self.datePickerToolbar.frame.size.height);
        self.datePicker.frame = datepickerFrame;

        [UIView commitAnimations];
        pickerVisible = YES;
    }
}

- (IBAction)done
{
    if(pickerVisible == YES)
    {
        [UIView beginAnimations:@"hideDatepicker" context:nil];
        [UIView setAnimationDuration:0.3];

        CGRect datepickerToolbarFrame = self.datePickerToolbar.frame;
        datepickerToolbarFrame.origin.y += (self.datePicker.frame.size.height + self.datePickerToolbar.frame.size.height);
        self.datePickerToolbar.frame = datepickerToolbarFrame;

        CGRect datepickerFrame = self.datePicker.frame;
        datepickerFrame.origin.y += (self.datePicker.frame.size.height + self.datePickerToolbar.frame.size.height);
        self.datePicker.frame = datepickerFrame;
        [UIView commitAnimations];

        // remove the picker after the animation is finished
        [self.datePicker performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:0.3];
    }
}

Answer 3

检查此库。它很容易实现。

https://github.com/hackiftekhar/IQActionSheetPickerView

Answer 4

转到下面的链接。

http://www.iostute.com/2015/01/create-and-use-date-picker-uidatepicker.html

我认为它会对你有所帮助。

Answer 5

您可以使用UIView，并在此UIView添加您的Datepicker和Done按钮。完成按钮创建动作事件，您将在此处理UIView隐藏和显示。希望这有帮助

如何在DatePicker中通过StoryBoard添加“完成”按钮？

5 个答案: