ios - 在 iOS 中被键盘隐藏的 TextField

Question

我有一个调出键盘的文本框。键盘隐藏了文本字段的底部。我已将 textField 放在 ScrollView 中，并在 View 中编写了以下代码。

- (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)keyboardWasShown:(NSNotification *)aNotification {
    // Called when the keyboard is shown
    NSDictionary *info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
    _driverSignupScrollView.contentInset = contentInsets;
    _driverSignupScrollView.scrollIndicatorInsets = contentInsets;

    // If active field is hidden by keyboard, scroll it so it's visible
    CGRect aRect = self.view.frame;
    aRect.size.height -= kbSize.height;

    CGPoint activeFieldPoint = CGPointMake(_activeField.frame.origin.x, _activeField.frame.origin.y + _activeField.frame.size.height);
    if (!CGRectContainsPoint(aRect, activeFieldPoint)) {
        [_scrollView scrollRectToVisible:_activeField.frame animated:YES];
    }
}

- (void)keyboardWillBeHidden:(NSNotification *)aNotification {
    // Called when the keyboard is hidden
    UIEdgeInsets contentInsets = UIEdgeInsetsZero;
    _scrollView.contentInset = contentInsets;
    _scrollView.scrollIndicatorInsets = contentInsets;
}

但是控件永远不会进入我的 if (!CGRectContainsPoint(aRect, activeFieldPoint)) 因此它不会向上滚动。

正在另一种方法中正确设置 _activeField。

我在这里遗漏了什么吗？

Answer 1

看看 TPKeyboardAvoiding:https://github.com/michaeltyson/TPKeyboardAvoiding

它使键盘管理变得异常简单。这就是 Apple 应该从一开始就设计它的方式。