单击按钮时UIDatePicker不显示

3 回答

• 0

  解决了 ：

  #import "ViewController.h"
  
  @interface ViewController ()
  
  @property (strong, nonatomic) IBOutlet UIDatePicker *datepicker;
  @property (strong, nonatomic) IBOutlet UIButton *btnDone;
  @property (strong, nonatomic) IBOutlet UILabel *selectedDate;
  @property (strong, nonatomic) IBOutlet UIToolbar *toolBar;
  
  @end
  
  @implementation ViewController
  @synthesize btnDone,datepicker;
  
  - (void)viewDidLoad {
  
  
      self.datepicker.hidden = YES;
      self.toolBar.hidden = YES;
      [self.datepicker addTarget:self action:@selector(datePickerChanged:) forControlEvents:UIControlEventValueChanged];
  
  }
  
  - (void)datePickerChanged:(UIDatePicker *)datePicker
  {
      NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
      [dateFormatter setDateFormat:@"dd-MM-yyyy"];
      NSString *strDate = [dateFormatter stringFromDate:datepicker.date];
      self.selectedDate.text = strDate;
  }
  
   - (void)didReceiveMemoryWarning
  {
      [super didReceiveMemoryWarning];
          // Dispose of any resources that can be recreated.
  }
  
  - (IBAction)show:(id)sender
  {
      [self.view addSubview:datepicker];
      self.toolBar.hidden = NO;
      self.datepicker.hidden = NO;
      self.btnDone.hidden=NO;
  }
  
  
  -(IBAction)HidePicker:(id)sender
  {
  
      self.datepicker.hidden = YES;
      self.toolBar.hidden = YES;
      self.btnDone.hidden=YES;
  
  }
  

  回复于 2024-04-26T07:26:49+08:00
• 1

  您必须从代码中删除此语法，然后它才会起作用：

  [self.datepicker removeFromSuperview];

  回复于 2024-04-26T07:26:49+08:00
• 0

  IBOutlet UIButton       *btnDateSelect;
  
  IBOutlet UIView         *vwMainDatePicker;
  
  IBOutlet UIView         *vwMainPicker;
  
  
  -(IBAction)dateshowPicker:(id)sender
  {
      [self textResingFirstResponder];
  
  
      [viewDatePicker setBackgroundColor:viewBackgroundColor];
  
      viewDatePicker.frame = CGRectMake(0, -viewDatePicker.frame.size.height, self.view.frame.size.width, viewDatePicker.frame.size.height);
      [[[[UIApplication sharedApplication] delegate] window] addSubview:vwMainDatePicker];
  
      vwMainDatePicker.frame = [[[UIApplication sharedApplication] delegate] window].frame;
  
  
      [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
  
          [scroll setScrollEnabled:NO];
  
  
              //  vwDate.frame = CGRectMake(self.view.frame.origin.x, 
          self.view.center.y-self.view.frame.size.height/3
  
              //       , self.view.frame.size.width, 205);
          viewDatePicker.center =  CGPointMake(vwMainDatePicker.frame.size.width  / 2,
  
                                               vwMainDatePicker.frame.size.height / 2);
  
      }completion:^(BOOL finished)
       {
  
           NSLog(@"Animation is complete");
       }];
  }
  - (IBAction)doneDatePickerBtnPressed:(id)sender
  {
  
      [UIView  animateWithDuration:0.5 animations:^{
          viewDatePicker.frame = CGRectMake(0, -viewDatePicker.frame.size.height, self.view.frame.size.width, viewDatePicker.frame.size.height);
  
      } completion:^(BOOL finished)
       {
           NSDateFormatter *df = [[NSDateFormatter alloc] init];
           [df setDateFormat:@"dd-MM-yyyy"];
           NSString  *datetSelected   = [df stringFromDate:datePicker.date];
           txtdob.text = datetSelected;
           isDateSelected = YES;
           [vwMainDatePicker removeFromSuperview];
           [scroll setScrollEnabled:YES];
  
           [scroll setUserInteractionEnabled:true];
       }];
  }
  - (IBAction)cancelDatePickerBtnPressed:(id)sender
  {
  
      [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
          viewDatePicker.frame = CGRectMake(0, -viewDatePicker.frame.size.height, self.view.frame.size.width, viewDatePicker.frame.size.height);
      }completion:^(BOOL finished)
       {
           NSLog(@"Animation is complete");
           NSDateFormatter *df = [[NSDateFormatter alloc] init];
           [df setDateFormat:@"dd-MM-yyyy"];
  
           if (isDateSelected)
           {
               // txtdob.text =@"";
           }else{
  
               txtdob.text =@"";
               isDateSelected = NO;
           }
  
           [vwMainDatePicker removeFromSuperview];
           [scroll setScrollEnabled:YES];
  
       }];
  
  }
  

  回复于 2024-04-26T07:26:49+08:00