我正在尝试构建一个聊天应用程序用户界面,布局的想法非常简单:
当输入栏处于焦点状态时,键盘将显示并“按下”聊天栏,因为它是网格,因此ListView的大小将调整为适合屏幕大小:
我将输入栏的边距更新为“推”它:
NSValue result = (NSValue)args.Notification.UserInfo.ObjectForKey(new NSString(UIKeyboard.FrameEndUserInfoKey));
CGSize keyboardSize = result.RectangleFValue.Size;
if (Element != null){
Element.Margin = new Thickness(0, 0, 0,keyboardSize.Height); //push the entry up to keyboard height when keyboard is activated
}
这是结果: https://drive.google.com/file/d/1S9yQ6ks15BRH3hH0j_M8awpDJFRFitUi/view?usp=sharing
视图确实向上推,并且ListView也按预期调整了大小,但是有两个我不知道如何解决的问题:
我已经在网上搜索了,尝试了IQKeyboardManager和KeyboardOverLap,上推动画既流畅又流畅,但是发生了奇怪的事情:
https://drive.google.com/file/d/1Zm0lMKB3wq07ve67wlcvLuNM_6Waad7R/view?usp=sharing
任何帮助将不胜感激,谢谢!
解决方案:
void OnKeyboardShow(object sender, UIKeyboardEventArgs args)
{
NSValue result = (NSValue)args.Notification.UserInfo.ObjectForKey(new NSString(UIKeyboard.FrameEndUserInfoKey));
CGSize keyboardSize = result.RectangleFValue.Size;
if (Control != null)
{
int bottomMargin = 0;
var sa = UIApplication.SharedApplication.KeyWindow.SafeAreaInsets;
bottomMargin = (int)sa.Bottom;
CGPoint offset = Control.ContentOffset;
var difference = keyboardSize.Height - bottomMargin;
if (Control.ContentSize.Height > Control.Frame.Height)
{
offset.Y += difference;
Control.SetContentOffset(offset, true);
}
else if (Control.ContentSize.Height + keyboardSize.Height > Control.Frame.Height)
{
offset.Y += Control.ContentSize.Height + keyboardSize.Height - Control.Frame.Height - bottomMargin;
Control.SetContentOffset(offset, true);
}
Control.ContentInset = new UIEdgeInsets(0, 0, difference, 0);
Control.ScrollIndicatorInsets = Control.ContentInset;
}
}
void OnKeyboardHide(object sender, UIKeyboardEventArgs args)
{
if (Control != null)
{
Control.ContentInset = new UIEdgeInsets(0, 0, 0, 0);
Control.ScrollIndicatorInsets = new UIEdgeInsets(0, 0, 0, 0);
}
}
答案 0 :(得分:1)
解决方案:
请参考以下代码
在iOS自定义渲染器中
protected override void OnElementChanged(ElementChangedEventArgs<ListView> e)
{
base.OnElementChanged(e);
if(Control!=null)
{
Control.KeyboardDismissMode = UIScrollViewKeyboardDismissMode.OnDrag;
NSNotificationCenter.DefaultCenter.AddObserver(this, new Selector("KeyBoardWillShow:"), new NSString("UIKeyboardWillShowNotification"), null);
NSNotificationCenter.DefaultCenter.AddObserver(this, new Selector("KeyBoardWillHide:"), new NSString("UIKeyboardWillHideNotification"), null);
}
}
[Export("KeyBoardWillShow:")]
void KeyBoardWillShow(NSNotification note)
{
NSValue keyboardRect = (NSValue)note.UserInfo.ObjectForKey(new NSString(UIKeyboard.FrameEndUserInfoKey));
Control.ContentInset = new UIEdgeInsets(0,0, keyboardRect.RectangleFValue.Size.Height,0);
}
[Export("KeyBoardWillHide:")]
void KeyBoardWillHide(NSNotification note)
{
Control.ContentInset = UIEdgeInsets.Zero;
}