UIDatePickerView在iOS中弹出

Question

尝试将UIDatePickerView显示为dialog box如Android 。 我试图在UIAlertView上添加它，但无法添加。

有人尝试过吗？

Answer 1

AddSubview在iOS7的UIAlertView中不可用

UIAlertView类旨在按原样使用，并且不支持子类化。 此类的视图层次结构是私有的，不能修改。

您应该使用UIAlertViewcontoller 。 这是代码：

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"\n\n\n\n\n\n\n\n\n\n\n" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
UIDatePicker *picker = [[UIDatePicker alloc] init];
[picker setDatePickerMode:UIDatePickerModeDate];
[alertController.view addSubview:picker];
[alertController addAction:({
UIAlertAction *action = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
NSLog(@"OK");
NSLog(@"%@",picker.date);
}];
action;
})];
UIPopoverPresentationController *popoverController = alertController.popoverPresentationController;
popoverController.sourceView = sender;
popoverController.sourceRect = [sender bounds];
[self presentViewController:alertController  animated:YES completion:nil];

希望这个能对您有所帮助....

Answer 2

在按钮操作中，我设置了datePicker

ViewController.m

#import "ViewController.h"

@interface ViewController ()
{
  UIDatePicker *datepicker;
}

@end

@implementation ViewController         



-(IBAction) showDatePicker:(id)sender
{
  UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"\n\n\n\n\n\n\n" message:nil preferredStyle:UIAlertControllerStyleAlert];
  datepicker = [[UIDatePicker alloc]init];  
  [datepicker setDatePickerMode:UIDatePickerModeDateAndTime];
  [datepicker setDatePickerMode:UIDatePickerModeDate];
  [datepicker addTarget:self action:@selector(getPickerValue:) forControlEvents:UIControlEventValueChanged];

  [alertController addAction:({
    UIAlertAction *action = [UIAlertAction actionWithTitle:@"Done" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        NSLog(@"The selected or picked datePicker value is - %@",datepicker.date);
        txtfldGetDatePickerValue.text = [self getStringDateFromDate:datepicker.date];
    }];
    action;
})];

[alertController.view addSubview:datepicker];
[self presentViewController:alertController animated:YES completion:nil];
}

-(void)getPickerValue:(UIDatePicker *)pickerDate
{
  txtfldGetDatePickerValue.text = [self getStringDateFromDate:pickerDate.date];
}

-(NSString *)getStringDateFromDate:(NSDate *)pickerDate
{
  NSDateFormatter* formatter = [[NSDateFormatter alloc] init];
  [formatter setDateFormat:@"dd/MM/yyyy"];
  return [formatter stringFromDate:pickerDate];
}

我尝试了许多解决方案，最终得到了输出。由于我没有给出正确的答案，所以我想为您的问题提供最佳答案。我搜索了很多答案。甚至我创建了示例项目来实现这一目标。我没有使用操作表和popoverpresentation视图控制器。只需将编码与UIAlertViewController一起使用。

一直以来，苹果一直不鼓励将UIDatePicker移至操作表

Answer 3

这将正常工作..签出代码。这将在ios7及更高版本中工作

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Select Date" message:@"" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
   UIDatePicker *picker = [[UIDatePicker alloc] initWithFrame:CGRectMake(10, alert.bounds.size.height, 320, 216)];
[alert addSubview:picker];
alert.bounds = CGRectMake(0, 0, 320 + 20, alert.bounds.size.height + 216 + 20);
[alert setValue:picker forKey:@"accessoryView"];
[alert show];

Answer 4

用于在电话中显示Popover只需使UIPopoverController代码成为类别：

//  UIPopoverController+iPhone.h
#import <UIKit/UIKit.h>

@interface UIPopoverController (iPhone)
+ (BOOL)_popoversDisabled;
@end
//  UIPopoverController+iPhone.m


#import "UIPopoverController+iPhone.h"

@implementation UIPopoverController (iPhone)
+ (BOOL)_popoversDisabled {
    return NO;
}
@end

这肯定会帮助您。