如何在ios上点击按钮实现日期选择器？

Question

我正在构建一个iOS应用程序.我正在使用故事板来构建屏幕,我已经制作了一个包含Name,Date,min和max等字段的表单.

我遇到的问题是无法在按钮点击时实现日期选择器,当用户选择日期,日期选择器隐藏时,想要在标签中显示所选日期.

我用Google搜索但找不到一个好的教程或库.我想在选择器中只显示日期和日期.

Answer 1

-(IBAction)datePickerBtnAction:(id)sender
{
    datePicker =[[UIDatePicker alloc]initWithFrame:CGRectMake(0, 0,10, 50)];
    datePicker.datePickerMode=UIDatePickerModeDate;
    datePicker.hidden=NO;
    datePicker.date=[NSDate date];
    [datePicker addTarget:self action:@selector(LabelTitle:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:datePicker];
    rightBtn=[[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(save:)];
    self.navigationItem.rightBarButtonItem=rightBtn;       
}

-(void)LabelTitle:(id)sender
{
    NSDateFormatter *dateFormat=[[NSDateFormatter alloc]init];
    dateFormat.dateStyle=NSDateFormatterMediumStyle;
    [dateFormat setDateFormat:@"MM/dd/yyyy"];
    NSString *str=[NSString stringWithFormat:@"%@",[dateFormat  stringFromDate:datePicker.date]];
    //assign text to label
    label.text=str; 
}

-(void)save:(id)sender
{
    self.navigationItem.rightBarButtonItem=nil;
    [datePicker removeFromSuperview];       
}

Answer 2

试试这个:

- (IBAction)date:(id)sender {
    datepicker=[[UIDatePicker alloc] initWithFrame:CGRectMake(0, 250, 325, 300)];
    datepicker.datePickerMode = UIDatePickerModeDate;
    datepicker.hidden = NO;
    datepicker.date = [NSDate date];

    [datepicker addTarget:self
                   action:@selector(LabelChange:)
         forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:datepicker]; //this can set value of selected date to your label change according to your condition


       NSDateFormatter * df = [[NSDateFormatter alloc] init];
    [df setDateFormat:@"M-d-yyyy"]; // from here u can change format.. 
    _selectedDate.text=[df stringFromDate:datepicker.date];
   }
- (void)LabelChange:(id)sender{
    NSDateFormatter *df = [[NSDateFormatter alloc] init];
    [df setDateFormat:@"M-d-yyyy"];
    _selectedDate.text = [NSString stringWithFormat:@"%@",
                          [df stringFromDate:datepicker.date]];
    [datepicker removeFromSuperview];
}