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How to Get Keyboard Height in Objective-C

Oct 19, 2024

Are you an iOS app developer working with Objective-C and having trouble obtaining the keyboard height? Here's a simple way to achieve this. Follow these steps to get the keyboard height in Objective-C for your iOS app development:

Step 1: Register for Keyboard Notifications

Before you can obtain the keyboard height, you need to register for keyboard notifications. You can do this by adding observers for the UIKeyboardWillShowNotification and UIKeyboardWillHideNotification in your view controller.

Step 2: Handle the Keyboard Notifications

Once you've registered for keyboard notifications, you'll need to handle them in your view controller. When the UIKeyboardWillShowNotification is triggered, you can obtain the keyboard height from the notification's userInfo dictionary.

Step 3: Calculate the Keyboard Height

After obtaining the keyboard height from the notification, you may need to adjust it based on your app's layout and any additional factors such as the device orientation.

Step 4: Use the Keyboard Height

Now that you have the keyboard height, you can use it to adjust your app's user interface as needed. This may involve moving or resizing certain elements to ensure they remain visible when the keyboard is displayed.

Here's an example of how you can achieve this in Objective-C:

- (void)viewDidLoad {

[super viewDidLoad];

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(keyboardWillShow:)

name:UIKeyboardWillShowNotification

object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(keyboardWillHide:)

name:UIKeyboardWillHideNotification

object:nil];

}

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

NSDictionary *userInfo = [notification userInfo];

CGRect keyboardFrame = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];

CGFloat keyboardHeight = keyboardFrame.size.height;

// Use keyboardHeight as needed

}

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

// Reset any UI adjustments made for the keyboard

}

By following these steps and implementing the necessary code, you can successfully obtain the keyboard height in Objective-C for your iOS app. This will allow you to create a better user experience by seamlessly handling the keyboard's presence in your app's interface. Happy coding!

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