用户输入后重命名按钮

Question

我是Xcode和编程的菜鸟。我有一个代码，以便用户可以点击按钮＆＃34;开始日期＆＃34;然后会弹出一个弹出日期选择器。我想知道如何按下按钮＆＃34;开始日期＆＃34;将自己重命名为用户选择的日期，然后也允许重新编辑它。

这是我到目前为止的代码：

- (void)changeDate:(UIDatePicker *)sender {
NSLog(@"New Date: %@", sender.date);
}

- (void)removeViews:(id)object {
[[self.view viewWithTag:9] removeFromSuperview];
[[self.view viewWithTag:10] removeFromSuperview];
[[self.view viewWithTag:11] removeFromSuperview];
}

- (void)dismissDatePicker:(id)sender {
CGRect toolbarTargetFrame = CGRectMake(0, self.view.bounds.size.height, 320, 44);
CGRect datePickerTargetFrame = CGRectMake(0, self.view.bounds.size.height+44, 320, 216);
[UIView beginAnimations:@"MoveOut" context:nil];
[self.view viewWithTag:9].alpha = 0;
[self.view viewWithTag:10].frame = datePickerTargetFrame;
[self.view viewWithTag:11].frame = toolbarTargetFrame;
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(removeViews:)];
[UIView commitAnimations];
}

- (IBAction)StartDate:(UIButton *)sender {
if ([self.view viewWithTag:9]) {
    return;
}
CGRect toolbarTargetFrame = CGRectMake(0, self.view.bounds.size.height-216-44, 320, 44);
CGRect datePickerTargetFrame = CGRectMake(0, self.view.bounds.size.height-216, 320, 216);

UIView *darkView = [[UIView alloc] initWithFrame:self.view.bounds];
darkView.alpha = 0;
darkView.backgroundColor = [UIColor blackColor];
darkView.tag = 9;
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self               action:@selector(dismissDatePicker:)];
[darkView addGestureRecognizer:tapGesture];
[self.view addSubview:darkView];

UIDatePicker *datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0,   self.view.bounds.size.height+44, 320, 216)];
datePicker.tag = 10;
datePicker.datePickerMode = UIDatePickerModeDate;
[datePicker addTarget:self action:@selector(changeDate:)  forControlEvents:UIControlEventValueChanged];
[self.view addSubview:datePicker];

UIToolbar *toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0,  self.view.bounds.size.height, 320, 44)];
toolBar.tag = 11;
toolBar.barStyle = UIBarStyleBlackTranslucent;
UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(dismissDatePicker:)];
[toolBar setItems:[NSArray arrayWithObjects:spacer, doneButton, nil]];
[self.view addSubview:toolBar];

[UIView beginAnimations:@"MoveIn" context:nil];
toolBar.frame = toolbarTargetFrame;
datePicker.frame = datePickerTargetFrame;
darkView.alpha = 0.5;
[UIView commitAnimations];

}