iOS iPhone - 在键盘上显示UIKeyboard高度

时间:2015-01-25 16:41:38

标签: ios iphone keyboard height uikeyboard

我知道我可以通过keyboardWillShow上的UIKeyboardFrameEndUserInfoKey获取UIKeyboard高度,并在它成为第一响应者时触发keyboardDidShow通知。

但是,我想知道这些事件之前键盘的预期高度,以便我可以在视图控制器的viewDidLoad中设置某些设计元素。

由于设备正在改变并且新的拼写校正条改变了键盘高度,我不想硬编码高度。

有没有人知道如何从键盘获得预期的高度,考虑到它是否有自动纠正等?

1 个答案:

答案 0 :(得分:0)

您可以通过以下方式进行:

- (void)viewDidLoad {
[super viewDidLoad];
[self initializeTextView];

}      - (无效)initializeTextView {

// Listen for keyboard appearances and disappearances
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardDidShow:)
                                             name:UIKeyboardDidShowNotification
                                           object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardDidHide:)
                                             name:UIKeyboardDidHideNotification
                                           object:nil];

myColoredTextview  = [[UITextView alloc]initWithFrame:CGRectMake(0, 20, 300, 100)];
myColoredTextview.delegate = self;
[self.view addSubview:myColoredTextview];
myColoredTextview.backgroundColor = [UIColor lightGrayColor];
}

- (void)keyboardDidShow: (NSNotification *) notif{
// Do something here
 NSLog(@"show:%@",notif);
 NSDictionary *userInfo = [notif valueForKey:@"userInfo"];
 CGRect kbFrame = [[userInfo objectForKey:@"UIKeyboardFrameBeginUserInfoKey"] CGRectValue];
 NSLog(@"keboardHeight:%f",kbFrame.size.height);

}

- (void)keyboardDidHide: (NSNotification *) notif{
// Do something here
NSLog(@"hide:%@",notif);

}