CODEWITHSUNDEEP
iosiphoneuikeyboard
MUHAMMAD WASIM
MUHAMMAD WASIM

Reputation: 191

Get Keyboard size in textFieldShouldBeginEditing delegate

I am having trouble while i am creating a messaging app, When keyboard is opened i am not sure about total size and frame for Keyboard (dictionary area is opened or not). I want to get total size and frame in

textFieldShouldBeginEditing

delegate.

Upvotes: 1

Views: 650

Answers (3)

user3432164
user3432164

Reputation:

You should use the UIKeyboardWillChangeFrameNotification . Also make sure to convert the CGRect into the proper view, for landscape use.

Set NSNotificationCenter in your textFieldShouldBeginEditing

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChange:) name:UIKeyboardWillChangeFrameNotification object:nil];

and write this method.

- (void)keyboardWillChange:(NSNotification *)notification {
    CGRect keyboardRect = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    keyboardRect = [self.view convertRect:keyboardRect fromView:nil]; //this is it!
}

In Swift 4

 NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(_noti:) ), name: NSNotification.Name.UIKeyboardWillChangeFrame , object: nil)

KeyboardWillChange Method

@objc func keyboardWillChange(_noti:NSNotification)
{
    let keyBoard = _noti.userInfo
    let keyBoardValue = keyBoard![UIKeyboardFrameEndUserInfoKey]
    let fram = keyBoardValue as? CGRect // this is frame
}

Upvotes: 7

user5300464
user5300464

Reputation:

I have faced this problem and solved by using notification observer on keyboard.

//set observer in textFieldShouldBeginEditing like    
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(myNotificationMethod:) name:UIKeyboardWillChangeFrameNotification object:nil];
    return YES;
}

// method implementation
- (void)myNotificationMethod:(NSNotification*)notification
{
    NSDictionary* keyboardInfo = [notification userInfo];
    NSValue* keyboardFrameBegin = [keyboardInfo valueForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardFrameBeginRect = [keyboardFrameBegin CGRectValue];
    NSLog(@"%@",keyboardFrameBegin);

    NSLog(@"%f",keyboardFrameBeginRect.size.height);
}

//remove observer
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{
   [[NSNotificationCenter defaultCenter ]removeObserver:self];    
    return YES;
}

Upvotes: 4

Ishan Handa
Ishan Handa

Reputation: 2281

Register for UIKeyboardWillShowNotification.

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

and in the selector get the keyboard frame:

- (void)keyboardWillShow:(NSNotification *)iNotification {
    NSDictionary *userInfo = [iNotification userInfo];
    NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardRect = [aValue CGRectValue];
}

Upvotes: 4

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