当我点击日期选择器的完成按钮时，我的文本字段中没有默认日期

Question

NSDateFormatter * df = [[NSDateFormatter alloc] init];

df.dateStyle = NSDateFormatterMediumStyle;


txtSelectNiche.font = [UIFont boldSystemFontOfSize:17.0];

[txtSelectNiche setInputView:(UIView*)[df stringFromDate:datePicker.date]];

txtSelectNiche.text = [NSString stringWithFormat：@“％@”，                     [df stringFromDate：datePicker.date]];

txtSelectNiche.textAlignment = UITextAlignmentCenter;