-(void)creatDatePicker
{
__weak NextViewController * weakself=self;
self.datePicker =[[[NSBundle mainBundle] loadNibNamed:@"DatePickerView" owner:self options:0] lastObject];
self.datePicker.frame =CGRectMake(0, self.view.frame.size.height-260, self.view.frame.size.width, 260);
self.datePicker.Datetitle =@"日期选择";
self.datePicker.cancelBlock = ^{
[UIView animateWithDuration:5 animations:^{
[weakself.datePicker removeFromSuperview];
}];
};
self.datePicker.sureBlock = ^(NSString *selectDateStr) {
[weakself.showDateLabel setText:selectDateStr];
[UIView animateWithDuration:5 animations:^{
[weakself.datePicker removeFromSuperview];
}];
};
[self.view addSubview:self.datePicker];

}

哪里需要直接调用此方法即可