ios - iPhone屏幕键盘的高度是多少？

我使用以下方法来确定 iOS 7.1 中的键盘框架。

在我的视图控制器的 init 方法中，我注册了UIKeyboardDidShowNotification：

NSNotificationCenter *center = [NSNotificationCenter defaultCenter];

[center addObserver:self selector:@selector(keyboardOnScreen:) name:UIKeyboardDidShowNotification object:nil];

然后，我使用下面的代码keyboardOnScreen:来访问键盘的框架。此代码userInfo从通知中获取字典，然后访问NSValue关联的UIKeyboardFrameEndUserInfoKey. 然后，您可以访问 CGRect 并将其转换为视图控制器的视图坐标。从那里，您可以根据该框架执行所需的任何计算。

-(void)keyboardOnScreen:(NSNotification *)notification

{

NSDictionary *info = notification.userInfo;

NSValue *value = info[UIKeyboardFrameEndUserInfoKey];

CGRect rawFrame = [value CGRectValue];

CGRect keyboardFrame = [self.view convertRect:rawFrame fromView:nil];

NSLog(@"keyboardFrame: %@", NSStringFromCGRect(keyboardFrame));

}

迅速

以及 Swift 的等效实现：

NotificationCenter.default.addObserver(self, selector: #selector(keyboardDidShow), name: UIResponder.keyboardDidShowNotification, object: nil)

@objc

func keyboardDidShow(notification: Notification) {

guard let info = notification.userInfo else { return }

guard let frameInfo = info[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { return }

let keyboardFrame = frameInfo.cgRectValue

print("keyboardFrame: \(keyboardFrame)")

}