IOS8 keyboard event not executing properly - ios

Question

Hi I am developing one iphone application in which I am using few keyboard events but those are not working properly in IOS8 as working in previous IOS versions. So here is my problem. I have two text fields. I am listening for two events (void)keyboardWillBeHidden:(NSNotification *)notification and (void)keyboardWasShown:(NSNotification *)notification. Inside these methods I am scrolling my content according to keyboard height. In previous IOS version it is working properly but in IOS8 it is causing problem. Whenever I select any text field it is triggering keyboardWasShown but whenever I select another text field then again it is triggering same event even though keyboard already shown. In previous versions it is triggering only once but for IOS 8 it is triggering twice. Here is my code
- (void)registerForKeyboardNotifications {
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)deregisterFromKeyboardNotifications {
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)keyboardWasShown:(NSNotification *)notification {
[LogRecords showLog:#"keyboard shown ... "];
if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone || (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad && UIDeviceOrientationIsLandscape([[UIApplication sharedApplication] statusBarOrientation])))
{
//scroll content here according to height of keyboard ;
}
}
- (void)keyboardWillBeHidden:(NSNotification *)notification
{
[LogRecords showLog:#"keyboard hide "];
if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone || (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad && UIDeviceOrientationIsLandscape([[UIApplication sharedApplication] statusBarOrientation])))
{
//scroll content here according to height of keyboard ;
}
}
Am I doing anything wrong or it is problem with new version? Need Help. Thank you.

Answer 1

I have been experiencing the same thing, only in iOS8.
I worked around the issue by adding a semaphore for the handling of the notification:
#implementation MyViewController
//workaround to iOS 8 bug where the keyboard notification is fired up twice
static BOOL flag;
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyboardWillShow:(NSNotification *)note {
if (flag) {
return;
}
flag = YES;
//your code for handling keyboard display
}
- (void)ga_keyboardWillHide:(NSNotification *)note {
if (!flag) {
return;
}
flag = NO;
// your code for handling keyboard hiding
}
#end