ios解决webview键盘遮挡问题

//注册键盘弹出通知
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];
    //注册键盘隐藏通知
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification

                                               object:nil];

//键盘弹出后将视图向上移动
-(void)keyboardWillShow:(NSNotification *)note{
    NSDictionary *info = [note userInfo];
    CGSize keyboardSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
    //目标视图view
    CGRect frame = self.wkWebView.frame;
    int y = frame.origin.y + frame.size.height - (self.view.frame.size.height - keyboardSize.height);
    NSTimeInterval animationDuration = 0.30f;
    [UIView beginAnimations:@"ResizeView" context:nil];
    [UIView setAnimationDuration:animationDuration];
    if(y > 0){
        self.view.frame = CGRectMake(0, -y, self.view.frame.size.width, self.view.frame.size.height);
    }
    [UIView commitAnimations];
}


//键盘隐藏后将视图恢复到原始状态
-(void)keyboardWillHide:(NSNotification *)note{
    NSTimeInterval animationDuration = 0.30f;
    [UIView beginAnimations:@"ResizeView" context:nil];
    [UIView setAnimationDuration:animationDuration];
    self.view.frame =CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
    [UIView commitAnimations];
}