检查iOS键盘中是否存在单词建议/词典

Question

如何检查iOS中的键盘是否显示字典或单词建议（我不知道正确的术语）。

我在网上搜索但我找不到答案。 在这些单词建议/字典后面是我的输入字段，但是当单词建议/字典存在时，它被隐藏在它后面。我希望我的输入在它们出现时动态地放在单词建议/字典的顶部。要做到这一点，我只需要在出现单词建议/字典时发出通知。有谁知道怎么样？

Answer 1

我也不知道建议栏的内容......

但您可以使用NSNotificationCenter观察键盘调整大小通知

试试吧。

也许帮助〜

- (void)viewDidLoad {

    [super viewDidLoad];
    //add UIKeyboardWillShowNotification to NSNotificationCenter
    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardShow:)
                                             name:UIKeyboardWillShowNotification
                                           object:nil];
}

- (void)keyboardShow:(NSNotification *)notification{

    //Should Log when keyboard show or resize         
    NSLog(@"keyboard notification");

    NSDictionary *userInfo = [notification userInfo];

    //Get the keyboard
    NSValue *keyBoardValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

    //Get the keyboard Rect
    CGRect keyboardRect = [keyBoardValue CGRectValue];

    NSLog(@"%@",[NSValue valueWithCGRect:keyboardRect]);
}

然后当您操作键盘时

你应该看起来像......

keyboard notification
NSRect: {{0, 228}, {320, 252}}
keyboard notification
NSRect: {{0, 264}, {320, 216}}
keyboard notification
NSRect: {{0, 228}, {320, 252}}
keyboard notification
NSRect: {{0, 264}, {320, 216}}
keyboard notification
NSRect: {{0, 228}, {320, 252}}

Answer 2

为UIKeyboardDidChangeFrameNotification添加观察者

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidChangeFrame:) name:UIKeyboardDidChangeFrameNotification object:nil];

在keyboardDidChangeFrame中检索UIKeyboardFrameEndUserInfoKey的值，如果显示的建议你将得到258的高度，否则225

- (void)keyboardDidChangeFrame:(NSNotification*)notification{
    NSDictionary *keyboardInfo = [notification userInfo];
    CGRect keyboardFrame = [[keyboardInfo valueForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGFloat keyboardHeight = CGRectGetHeight(keyboardFrame);
    NSLog(@"%f", keyboardHeight);
}