從日期選擇器中顯示文本字段中的時間

Question

我試圖在文本字段中的datePicker中顯示時間。我已經得到了這一步

UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(112, 88, 97, 30)]; 
textField.borderStyle = UITextBorderStyleRoundedRect; 
textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter; 
[self.view addSubview:textField]; 

UIDatePicker *datePicker = [[UIDatePicker alloc] init]; 
datePicker.datePickerMode = UIDatePickerModeDate; 
[datePicker addTarget:self action:@selector(datePickerValueChanged:) forControlEvents:UIControlEventValueChanged]; 
datePicker.timeZone = [NSTimeZone defaultTimeZone]; 
datePicker.minuteInterval = 5; 
datePicker.datePickerMode = UIDatePickerModeTime; 

[textField setInputView:datePicker]; 

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setDateStyle: NSDateFormatterShortStyle]; 
textField.text = [dateFormatter stringFromDate:datePicker.date]; 

但文本框不會改變

Answer 1

什麼是您-(void)datePickerValueChanged:方法是什麼樣子？

它看起來像下面這樣：

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setDateStyle: NSDateFormatterShortStyle]; 
textField.text = [dateFormatter stringFromDate:datePicker.date]; 

其中textField是正在編輯和datePicker是日期選擇器改變其值的文本字段？