移動視圖，以便鍵盤不隱藏文本字段

Question

在我的應用程序中，當我單擊文本字段時，鍵盤會隱藏它。 請幫助我 - 當我點擊文本字段時，如何移動我的視圖。 我在textFieldDidBeginEditing:使用此代碼textFieldDidBeginEditing:

self.tableView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 0, 216, 0);
self.tableView.contentInset = UIEdgeInsetsMake(0, 0, 216, 0);

但它不起作用。

Answer 1

您不應該信任textFieldDidBeginEditing:調整鍵盤，因為即使用戶使用不顯示屏幕鍵盤的物理鍵盤進行鍵入，也會調用此方法。

而是收聽UIKeyboardWillShowNotification ，它僅在實際顯示鍵盤時觸發。 您需要執行三個步驟：

1. 從通知userInfo字典中確定鍵盤的實際大小。 尺寸將不同於橫向/縱向和不同的設備。
2. 使用確定的大小更新contentInset 。 你可以動畫制作，通知甚至可以告訴你鍵盤動畫的持續時間。
3. 將文本域滾動到視圖中，很容易忘記這一點！

您可以從此處找到更多信息和示例代碼

Answer 2

您可以執行以下操作，但首先要確保已將UITextField委托設置為您自己和

#define kOFFSET_FOR_KEYBOARD 350;

在頂部。 這是您希望視圖移動的距離

//method to move the view up/down whenever the keyboard is shown/dismissed

-(void)setViewMovedUp:(BOOL)movedUp
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3]; // if you want to slide up the view
    [UIView setAnimationBeginsFromCurrentState:YES];

    CGRect rect = self.view.frame;
    if (movedUp)
    {
        // 1. move the view's origin up so that the text field that will be hidden come above the keyboard 
        // 2. increase the size of the view so that the area behind the keyboard is covered up.

        if (rect.origin.y == 0 ) {
            rect.origin.y -= kOFFSET_FOR_KEYBOARD;
            //rect.size.height += kOFFSET_FOR_KEYBOARD;
        }

    }
    else
    {
        if (stayup == NO) {
            rect.origin.y += kOFFSET_FOR_KEYBOARD;
            //rect.size.height -= kOFFSET_FOR_KEYBOARD;
        }
    }
    self.view.frame = rect; 
    [UIView commitAnimations];
}


- (void)keyboardWillHide:(NSNotification *)notif {
    [self setViewMovedUp:NO];
}


- (void)keyboardWillShow:(NSNotification *)notif{
    [self setViewMovedUp:YES];
}


- (void)textFieldDidBeginEditing:(UITextField *)textField {
    stayup = YES;
    [self setViewMovedUp:YES];
}


- (void)textFieldDidEndEditing:(UITextField *)textField {
    stayup = NO;
    [self setViewMovedUp:NO];
}

- (void)viewWillAppear:(BOOL)animated
{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) 
                                                 name:UIKeyboardWillShowNotification object:self.view.window];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) 
                                                 name:UIKeyboardWillHideNotification object:self.view.window];
}

- (void)viewWillDisappear:(BOOL)animated
{
    // unregister for keyboard notifications while not visible.
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}