与文本字段和日期选择器相关的问题

我有一个与单击文本字段时隐藏和显示日期选择器视图相关的问题...实际上我有 2 个文本字段..这是我的问题图像...

Problem

单击文本字段时日期选择器显示和隐藏...它应该在开始编辑时显示并在结束编辑时隐藏...

当我们第一次点击“textfield 1”时，它工作得很好，但是一旦它resignFirstResponder并让第二个字段响应，问题就出现了。

CODE

func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
    self.datepicker.alpha = 0.0
    self.datepicker.hidden = false
    UIView.animateWithDuration(0.3, animations: { () -> Void in
        self.datepicker.alpha = 1.0
        self.conDateHeight.constant = 100.0
        self.datepicker.addTarget(self, action: Selector("dataPickerChanged:"), forControlEvents: UIControlEvents.ValueChanged)
    })
    return true
}

func textFieldShouldEndEditing(textField: UITextField) -> Bool {
        UIView.animateWithDuration(0.3, animations: {
        self.datepicker.alpha = 0.0
        }, completion: {
            (value: Bool) in
            self.conDateHeight.constant = 0.0
            self.datepicker.hidden = true
        })
    return true
}


func textFieldShouldReturn(textField: UITextField) -> Bool {
    if textField == self.txtToDate {
        txtToDate.resignFirstResponder()
        txtFromDate.becomeFirstResponder()
    }
    else if textField == self.txtFromDate {
        txtFromDate.resignFirstResponder()
        txtToDate.becomeFirstResponder()
    }
    return true
}  

当我在第一个文本字段后隐藏键盘，然后在第二个文本字段中输入时，就可以了...否则问题就是这样

使用日期选择器作为输入视图的击球手

UIView *viewDateInput = [[UIView alloc] initWithFrame:CGRectMake(0, 0,[UIScreen mainScreen].bounds.size.width, 200)];
[viewDateInput setBackgroundColor:[UIColor whiteColor]];
self.pickerDate = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 0, viewDateInput.frame.size.width, viewDateInput.frame.size.height)];
self.pickerDate.datePickerMode = UIDatePickerModeDate;
[viewDateInput addSubview:self.pickerDate];
[self.pickerDate addTarget:self action:@selector(dateChanged:) forControlEvents:UIControlEventValueChanged];
[self.txtDate setInputView:viewDateInput];

日期更改功能

- (void)dateChanged:(id)sender
{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd"];
    NSString *currentTime = [dateFormatter stringFromDate:self.pickerDate.date];
self.txtDate.text = currentTime;
}