最近项目里面有下拉刷新的需求,自己做了一个,效果还不错。

  <Style TargetType="local:PullToRefreshControl">
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<Grid>
<StackPanel VerticalAlignment="Center" Orientation="Horizontal" Visibility="{Binding IsReachThreshold,Converter={StaticResource InversedBooleanToVisibilityConverter}}">
<FontIcon FontSize="" FontFamily="Segoe UI Emoji" Glyph="↓" IsHitTestVisible="False" VerticalAlignment="Bottom"/>
<TextBlock Margin="5,0,5,0" Text="下拉刷新" VerticalAlignment="Bottom"/>
</StackPanel>
<StackPanel VerticalAlignment="Center" Orientation="Horizontal" Visibility="{Binding IsReachThreshold, Converter={StaticResource BooleanToVisibilityConverter}}">
<FontIcon FontSize="" FontFamily="Segoe UI Emoji" Glyph="↑" IsHitTestVisible="False" VerticalAlignment="Bottom"/>
<TextBlock Margin="5,0,5,0" Text="释放立即刷新" VerticalAlignment="Bottom"/>
</StackPanel>
</Grid>
</DataTemplate>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:PullToRefreshControl">
<Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Margin="{TemplateBinding Margin}">
<ScrollViewer x:Name="ScrollViewer"
VerticalScrollBarVisibility="Hidden">
<StackPanel>
<ContentControl x:Name="PanelHeader" ContentTemplate="{TemplateBinding HeaderTemplate}" HorizontalContentAlignment="Center" VerticalContentAlignment="Bottom" />
<ContentPresenter x:Name="PanelContent" ContentTemplate="{TemplateBinding ContentTemplate}" ContentTransitions="{TemplateBinding ContentTransitions}" Content="{TemplateBinding Content}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</StackPanel>
</ScrollViewer>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
 [TemplatePart(Name = PanelHeader, Type = typeof(ContentControl))]
[TemplatePart(Name = PanelContent, Type = typeof(ContentPresenter))]
[TemplatePart(Name = ScrollViewer, Type = typeof(ScrollViewer))]
public class PullToRefreshControl:ContentControl
{
#region Fields
private const string PanelHeader = "PanelHeader";
private const string PanelContent = "PanelContent";
private const string ScrollViewer = "ScrollViewer";
private ContentControl _panelHeader;
private ContentPresenter _panelContent;
private ScrollViewer _scrollViewer;
#endregion #region Property /// <summary>
/// The threshold for release to refresh,defautl value is 2/5 of PullToRefreshPanel's height.
/// </summary>
public double RefreshThreshold
{
get { return (double)GetValue(RefreshThresholdProperty); }
set { SetValue(RefreshThresholdProperty, value); }
} // Using a DependencyProperty as the backing store for RefreshThreshold. This enables animation, styling, binding, etc...
public static readonly DependencyProperty RefreshThresholdProperty =
DependencyProperty.Register("RefreshThreshold", typeof(double), typeof(PullToRefreshControl), new PropertyMetadata(0.0,new PropertyChangedCallback(OnRefreshThresholdChanged))); private static void OnRefreshThresholdChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var pullToRefreshControl = d as PullToRefreshControl;
pullToRefreshControl.UpdateContentGrid();
} /// <summary>
/// occur when reach threshold.
/// </summary>
public event EventHandler PullToRefresh; public DataTemplate HeaderTemplate
{
get { return (DataTemplate)GetValue(HeaderTemplateProperty); }
set { SetValue(HeaderTemplateProperty, value); }
} // Using a DependencyProperty as the backing store for HeaderTemplate. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HeaderTemplateProperty =
DependencyProperty.Register("HeaderTemplate", typeof(DataTemplate), typeof(PullToRefreshControl), new PropertyMetadata(null)); public bool IsReachThreshold
{
get { return (bool)GetValue(IsReachThresholdProperty); }
set { SetValue(IsReachThresholdProperty, value); }
} // Using a DependencyProperty as the backing store for IsReachThreshold. This enables animation, styling, binding, etc...
public static readonly DependencyProperty IsReachThresholdProperty =
DependencyProperty.Register("IsReachThreshold", typeof(bool), typeof(PullToRefreshControl), new PropertyMetadata(false)); #endregion protected override void OnApplyTemplate()
{
_panelHeader = GetTemplateChild(PanelHeader) as ContentControl;
_panelHeader.DataContext = this;
_panelContent = GetTemplateChild(PanelContent) as ContentPresenter;
_scrollViewer = GetTemplateChild(ScrollViewer) as ScrollViewer;
_scrollViewer.ViewChanged += _scrollViewer_ViewChanged;
base.OnApplyTemplate();
} private void _scrollViewer_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
//Sometime we can't make it to 0.0.
IsReachThreshold = _scrollViewer.VerticalOffset <= 5.0;
if (e.IsIntermediate)
{
return;
} if (IsReachThreshold)
{
if (PullToRefresh!=null)
{
PullToRefresh(this, null);
}
}
_panelHeader.Height = RefreshThreshold > _panelHeader.ActualHeight ? RefreshThreshold : _panelHeader.ActualHeight;
this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
_scrollViewer.ChangeView(null, _panelHeader.Height, null);
}); } public PullToRefreshControl()
{
this.DefaultStyleKey = typeof(PullToRefreshControl);
this.Loaded +=(s,e)=>
{
if (RefreshThreshold == 0.0)
{
RefreshThreshold = this.ActualHeight * / 5.0;
}
UpdateContentGrid();
};
this.SizeChanged += (s, e) =>
{
if (RefreshThreshold==0.0)
{
RefreshThreshold = this.ActualHeight * / 5.0;
}
UpdateContentGrid();
};
} #region Method
private void UpdateContentGrid()
{
if (_scrollViewer != null && _panelContent!=null && _panelHeader !=null)
{
_panelHeader.Height = RefreshThreshold > _panelHeader.ActualHeight? RefreshThreshold: _panelHeader.ActualHeight;
this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
_scrollViewer.ChangeView(null, _panelHeader.Height, null, true);
});
_panelContent.Width = this.ActualWidth;
_panelContent.Height = this.ActualHeight;
}
}
#endregion
}

UWP 下拉刷新控件(PullToRefreshControl)的更多相关文章

  1. android官方下拉刷新控件SwipeRefreshLayout的使用

    可能开发安卓的人大多数都用过很多下拉刷新的开源组件,但是今天用了官方v4支持包的SwipeRefreshLayout觉得效果也蛮不错的,特拿出来分享. 简介:SwipeRefreshLayout组件只 ...

  2. [Android]下拉刷新控件RefreshableView的实现

    以下内容为原创,欢迎转载,转载请注明 来自天天博客:http://www.cnblogs.com/tiantianbyconan/p/4172483.html 需求:自定义一个ViewGroup,实现 ...

  3. android SwipeRefreshLayout google官方下拉刷新控件

    下拉刷新功能之前一直使用的是XlistView很方便我前面的博客有介绍 SwipeRefreshLayout是google官方推出的下拉刷新控件使用方法也比较简单 今天就来使用下SwipeRefres ...

  4. Android PullToRefresh下拉刷新控件的简单使用

    PullToRefresh这个开源库早就听说了,不过一直没用过.作为一个经典的的开源库,我觉得还是有必要认识一下. 打开github上的网址:https://github.com/chrisbanes ...

  5. Android SwipeRefreshLayout 官方下拉刷新控件介绍

    转载请标明出处:http://blog.csdn.net/lmj623565791/article/details/24521483 下面App基本都有下拉刷新的功能,以前基本都使用XListView ...

  6. Google SwipeRefreshLayout(Goolge官方下拉刷新控件)尝鲜

    前天Google官方终于出了Android刷新控件——SwipeRefreshLayout. 使用前先需要将android.support.v4.jar升级到19.1.升级后,可能会出现SDK版本与A ...

  7. 上拉加载下拉刷新控件WaterRefreshLoadMoreView

    上拉加载下拉刷新控件WaterRefreshLoadMoreView 效果: 源码: // // SRSlimeView // @author SR // Modified by JunHan on ...

  8. 官方下拉刷新控件SwipeRefreshLayout的使用

    今天看博客,发现有了这个下拉刷新的控件,效果看上去还蛮好的,于是我也想研究的是使用一下,写个demo.其实使用很简单的,但就是为了能使用这个新组建我下了好久的更新,后来还是直接去官网下载最新的ADT得 ...

  9. Android仿苹果版QQ下拉刷新实现(一) ——打造简单平滑的通用下拉刷新控件

    前言: 忙完了结婚乐APP的开发,终于可以花一定的时间放在博客上了.好了,废话不多说,今天我们要带来的效果是苹果版本的QQ下拉刷新.首先看一下目标效果以及demo效果:      因为此效果实现的步骤 ...

随机推荐

  1. cocos2d-x打飞机实例总结

    写了一个cocos2d-x的打飞机游戏,为了深入了解,准备进入引擎内部,深入分析一下打飞机,顺便梳理一下相关的知识 打算分为几个部分: 1.程序入口和场景切换模块分析:简单了解HelloWorld怎样 ...

  2. hdu5000 背包dp

    题意可抽象为:N个包中每个包容量是T[i],每个包都拿一些,设拿出的总数为sum时的方案数为q,求max(q) 设dp[i][j]为拿了前i个包,共拿出了j物品时的方案数.那么 for i=1 to ...

  3. python标准模块(三)

    本文会涉及到的模块: subprocess logging 1. subprocess 可以执行shell命令的相关模块和函数有: os.system os.spawn os.popen --废弃 p ...

  4. ubuntu14.04 安装pip

    参考链接: 1.http://www.liquidweb.com/kb/how-to-install-pip-on-ubuntu-14-04-lts/ 2.http://idroot.net/tuto ...

  5. Oracle 数据导入导出

    一.导出模式(三种模式)及命令格式 1. 全库模式 exp 用户名/密码@网络服务名 full=y file=路径\文件名.dmp log=路径\文件名.log 2. 用户模式(一般情况下采用此模式) ...

  6. 不把C作为第一门语言是个好主意么

    ----------------------------------------------------------------------------------   不把C作为第一门语言是个好主意 ...

  7. thinkphp3.2与phpexcel带图片生成 完美案例

    thinkphp3.2与phpexcel完美案例 // 导出exl public function look_down(){ $id = I('get.id'); $m = M ('offer_goo ...

  8. webstorm常用快捷键

    常用快捷键—Webstorm入门 提高代码编写效率,离不开快捷键的使用,Webstorm拥有丰富的代码快速编辑功能,你可以自由配置功能快捷键. 快捷键配置 点击“File”-> “setting ...

  9. PHP中判断变量为空的几种方法

    判断变量为空,在许多场合都会用到,同时自己和许多新手一样也经常会犯一些错误, 所以自己整理了一下PHP中一些常用的.判断变量为空的方法. 1. isset功能:判断变量是否被初始化本函数用来测试变量是 ...

  10. js自动闭合html标签,自动补全html标记

    假如我有一个DIV,如果没有闭合后面的样式都会乱了,这样的代码可能会影响后面的样式,我希望用js去自动闭合这种没有闭合的标签: 代码如下: 1 2 3 4 5 6 7 8 9 10 11 12 13 ...