iphone - WPF/C# : 'Slide to Unlock' feature from iPhone

Question

我只是想征求您对如何使用 Windows Presentation Foundation 从 iPhone 实现“滑动解锁”功能的意见。

我已经看到这篇文章:iPhone slide to unlock progress bar (part 1) ，并想知道您是否可以给我一些其他资源，以获得良好的开端。谢谢。

Answer 1

我会重新设计 slider ，因为从功能角度来看，这是最接近的控件。

您应该捕获 Value_Changed 事件，如果 Value == Maximum，则 slider “打开”。

重新设计该控件将使它看起来像您轻松的“解锁控件”。我稍后会粘贴一个示例。

-- 编辑--工作有空闲时间，所以我就为你开始了。使用方法如下:

<Grid x:Name="LayoutRoot">
    <Slider Margin="185,193,145,199" Style="{DynamicResource SliderStyle1}"/>
</Grid>

和资源字典:

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d">

    <LinearGradientBrush x:Key="MouseOverBrush" EndPoint="0,1" StartPoint="0,0">
        <GradientStop Color="#FFF" Offset="0.0"/>
        <GradientStop Color="#AAA" Offset="1.0"/>
    </LinearGradientBrush>


    <LinearGradientBrush x:Key="LightBrush" EndPoint="0,1" StartPoint="0,0">
        <GradientStop Color="#FFF" Offset="0.0"/>
        <GradientStop Color="#EEE" Offset="1.0"/>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="NormalBorderBrush" EndPoint="0,1" StartPoint="0,0">
        <GradientStop Color="#CCC" Offset="0.0"/>
        <GradientStop Color="#444" Offset="1.0"/>
    </LinearGradientBrush>

    <Style x:Key="SimpleScrollRepeatButtonStyle" d:IsControlPart="True" TargetType="{x:Type RepeatButton}">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="IsTabStop" Value="false"/>
        <Setter Property="Focusable" Value="false"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type RepeatButton}">
                    <Grid>
                        <Rectangle Fill="{TemplateBinding Background}" Stroke="{TemplateBinding BorderBrush}" StrokeThickness="{TemplateBinding BorderThickness}"/>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>


    <Style x:Key="ThumbStyle1" d:IsControlPart="True" TargetType="{x:Type Thumb}">
        <Setter Property="SnapsToDevicePixels" Value="true"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Thumb}">
                    <Grid Width="54">
                        <Ellipse x:Name="Ellipse" />
                        <Border CornerRadius="10" >
                            <Border.Background>
                                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                                    <GradientStop Color="#FFFBFBFB" Offset="0.075"/>
                                    <GradientStop Color="Gainsboro" Offset="0.491"/>
                                    <GradientStop Color="#FFCECECE" Offset="0.509"/>
                                    <GradientStop Color="#FFA6A6A6" Offset="0.943"/>
                                </LinearGradientBrush>
                            </Border.Background>
                        </Border>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Fill" Value="{StaticResource MouseOverBrush}" TargetName="Ellipse"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Fill" Value="{StaticResource DisabledBackgroundBrush}" TargetName="Ellipse"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style x:Key="SliderStyle1" TargetType="{x:Type Slider}">
        <Setter Property="Background" Value="{StaticResource LightBrush}"/>
        <Setter Property="BorderBrush" Value="{StaticResource NormalBorderBrush}"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Slider}">
                    <Border CornerRadius="14" Padding="4">
                        <Border.Background>
                            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                                <GradientStop Color="#FF252525" Offset="0"/>
                                <GradientStop Color="#FF5C5C5C" Offset="1"/>
                            </LinearGradientBrush>
                        </Border.Background>
                        <Grid x:Name="GridRoot">
                        <TextBlock Text="Slide to unlock" HorizontalAlignment="Center" VerticalAlignment="Center" />
                        <!-- TickBar shows the ticks for Slider -->

                        <!-- The Track lays out the repeat buttons and thumb -->
                            <Track x:Name="PART_Track" Height="Auto">
                                <Track.Thumb>
                                    <Thumb Style="{StaticResource ThumbStyle1}"/>
                                </Track.Thumb>
                                <Track.IncreaseRepeatButton>
                                    <RepeatButton Style="{StaticResource SimpleScrollRepeatButtonStyle}" Command="Slider.IncreaseLarge" Background="Transparent"/>
                                </Track.IncreaseRepeatButton>
                                <Track.DecreaseRepeatButton>
                                    <RepeatButton Style="{StaticResource SimpleScrollRepeatButtonStyle}" Command="Slider.DecreaseLarge" d:IsHidden="True"/>
                                </Track.DecreaseRepeatButton>
                            </Track>
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="TickPlacement" Value="TopLeft"/>
                        <Trigger Property="TickPlacement" Value="BottomRight"/>
                        <Trigger Property="TickPlacement" Value="Both"/>
                        <Trigger Property="IsEnabled" Value="false"/>

                        <!-- Use a rotation to create a Vertical Slider form the default Horizontal -->
                        <Trigger Property="Orientation" Value="Vertical">
                            <Setter Property="LayoutTransform" TargetName="GridRoot">
                                <Setter.Value>
                                    <RotateTransform Angle="-90"/>
                                </Setter.Value>
                            </Setter>
                            <!-- Track rotates itself based on orientation so need to force it back -->
                            <Setter TargetName="PART_Track" Property="Orientation" Value="Horizontal"/>
                        </Trigger>

                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

</ResourceDictionary>

请注意，这是一个非常好的开始，但还不是全部。我还将定义一个派生自 slider 并自动使用此样式的自定义控件。另外，当用户向右滑动时，我还会公开 SlideUnlocked 事件。为了完成这一切，我还会添加一个动画，将拇指向左移动，以防用户将其向右拖动，但不是一路拖动(以准确模仿 iPhone 的 UX。)

祝你好运，如果您不知道如何实现我建议的任何阶段，请询问。