7

我搜索了这个网站,但找不到解决我现在面临的问题的方法。希望有人可以提供帮助。

我创建了一个 UIAlertView 来提示用户在 iPhone 应用程序中输入他们的名字。

    UIAlertView *enterNameAlert = [[UIAlertView alloc] initWithTitle:@"Enter your name"
                                                             message:@"\n\n\n"
                                                            delegate:self
                                                   cancelButtonTitle:NSLocalizedString(@"Cancel", nil)
                                                   otherButtonTitles:NSLocalizedString(@"OK", nil),nil];

    UITextField *enterNameField = [[UITextField alloc] initWithFrame:CGRectMake(16, 83, 252, 25)];
    enterNameField.keyboardAppearance = UIKeyboardAppearanceAlert;
    enterNameField.borderStyle = UITextBorderStyleRoundedRect;
    enterNameField.autocorrectionType = UITextAutocorrectionTypeNo;
    enterNameField.clearButtonMode = UITextFieldViewModeWhileEditing;
    enterNameField.returnKeyType = UIReturnKeyDone;
    enterNameField.delegate = self;
    [enterNameField becomeFirstResponder];
    [enterNameAlert addSubview:enterNameField];

    [enterNameAlert show];
    [enterNameAlert release];
    [enterNameField release];

我已将此 viewController 设置为符合头文件中的 UITextFieldDelegate,并实现textFieldShouldReturn:了在用户点击完成时尝试关闭键盘。

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    if ([textField isFirstResponder]) {
        [textField resignFirstResponder];
        NSLog(@"text field was first responder");
    } else {
        [textField becomeFirstResponder];
        [textField resignFirstResponder];
        NSLog(@"text field was not first responder");
    }
    NSLog(@"textfieldshouldreturn");
    return YES;
}

在调试器中,当我点击 Done 按钮时,我确认此方法已成功调用,当时 textField 是第一响应者。然而,键盘并没有消失,只是小 clearButton 消失了。很明显,textField 不再是第一响应者,因为当我再次单击“完成”按钮时,什么都没有被调用。我只想用完成按钮关闭键盘。任何人都可以提供解决方案吗?百万谢谢。

4

6 回答 6

6

首先,您需要定义您的enterNameAlertin 接口标头。然后使用下面的代码。

- (void)viewDidLoad {    
    [super viewDidLoad];
    enterNameAlert = [[UIAlertView alloc] initWithTitle:@"Enter your name"
                                                             message:@"\n\n\n"
                                                            delegate:self
                                                   cancelButtonTitle:NSLocalizedString(@"Cancel", nil)
                                                   otherButtonTitles:NSLocalizedString(@"OK", nil),nil];

    UITextField *enterNameField = [[UITextField alloc] initWithFrame:CGRectMake(16, 83, 252, 25)];
    enterNameField.keyboardAppearance = UIKeyboardAppearanceAlert;
    enterNameField.borderStyle = UITextBorderStyleRoundedRect;
    enterNameField.autocorrectionType = UITextAutocorrectionTypeNo;
    enterNameField.clearButtonMode = UITextFieldViewModeWhileEditing;
    enterNameField.returnKeyType = UIReturnKeyDone;
    enterNameField.delegate = self;    
    [enterNameAlert addSubview:enterNameField];
    [enterNameField becomeFirstResponder];
    [enterNameAlert show];    
    [enterNameField release];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    if ([textField isFirstResponder]) {
        [textField resignFirstResponder];
        [enterNameAlert dismissWithClickedButtonIndex:1 animated:YES];
        [enterNameAlert release];
        NSLog(@"text field was first responder");
    } else {
        [textField becomeFirstResponder];
        [textField resignFirstResponder];
        NSLog(@"text field was not first responder");
    }
    NSLog(@"textfieldshouldreturn");
    return YES;
}
于 2010-11-24T11:29:48.790 回答
0

尝试在 TextField 的“DidEndOnExit”事件上使用 resignFirstResponder 关闭键盘。

当您完成将数据输入到 TextField 时,尝试通过按键盘上的完成按钮来关闭键盘。

希望这可以帮助。

于 2010-10-12T04:27:47.677 回答
0

简单地做

[mytextField addTarget:self 
            action:@selector(methodToFire:)
            forControlEvents:UIControlEventEditingDidEndOnExit];
于 2012-01-26T21:52:42.703 回答
0

如果在调用 resignFirstResponder 方法后将文本字段的释放移至委托方法会发生什么?

于 2010-10-07T20:49:33.673 回答
0

如果有人在情节提要中遇到问题,我必须进入我的 uitextfields 属性并 ctrl+从它的委托拖动到它的根视图控制器,所有这些都在情节提要中,这解决了所有问题..

于 2013-04-11T08:46:34.323 回答
0

让另一个对象成为第一响应者,然后立即辞职。

于 2010-10-14T14:34:54.357 回答