iphone - 激活 iPhone 键盘

Question

我不敢相信我还没有找到任何关于此的文档，但我想知道如何命令键盘激活并接收来自它的输入。我可以找到在编辑文本字段时操作弹出键盘的所有示例。谢谢

Answer 1

您还可以使用 UIKeyInput 协议(protocol)来请求键盘，而无需创建隐藏文本字段。

@interface My : UIViewController <UIKeyInput> ...

然后在实现中类似这样

// Methods which make the keyboard work

- (BOOL) hasText
{
    return YES;
}

- (void)deleteBackward
{
    [self handleBackspace];
}

- (void) insertText:(NSString* )text
{
    int n = [text length];
    int i;
    for (i = 0; i < n; i++)
    {
        [self handleKey:[text characterAtIndex:i]];
    }
}

- (BOOL) canBecomeFirstResponder
{
    return YES;
}

// Methods to manage the appearance of the keyboard

- (void) summonKeyboard
{
    [self becomeFirstResponder];
}

- (void) dismissKeyboard
{
    [self resignFirstResponder];
}