[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasChange:) name:UIKeyboardDidChangeFrameNotification object:nil];
- (void)keyboardWasChange:(NSNotification *)aNotification {
NSDictionary *info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
if (kbSize.height == 216) {
//英文键盘的高度
_columnBack.frame = CGRectMake(0, 198 + heightAdded, 320, 44);
}
else if(kbSize.height == 252){
//中文键盘的高度
_columnBack.frame = CGRectMake(0, 165 + heightAdded, 320, 44);
}
}