GestureRecognizer Class

Reference

Definition

Namespace:: Xamarin.Forms

Assembly:: Xamarin.Forms.Core.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

The base class for all gesture recognizers.

public class GestureRecognizer : Xamarin.Forms.Element, System.ComponentModel.INotifyPropertyChanged, Xamarin.Forms.IGestureRecognizer

type GestureRecognizer = class
    inherit Element
    interface IGestureRecognizer
    interface INotifyPropertyChanged

Inheritance: System.Object

BindableObject

Element
GestureRecognizer

Derived: Xamarin.Forms.ClickGestureRecognizer

Xamarin.Forms.DragGestureRecognizer

Xamarin.Forms.DropGestureRecognizer

Xamarin.Forms.PanGestureRecognizer

Xamarin.Forms.PinchGestureRecognizer

More…

Implements: System.ComponentModel.INotifyPropertyChanged IGestureRecognizer

Properties

AutomationId	Gets or sets a value that allows the automation framework to find and interact with this element. (Inherited from Element)
BindingContext	Gets or sets object that contains the properties that will be targeted by the bound properties that belong to this BindableObject. (Inherited from BindableObject)
ClassId	Gets or sets a value used to identify a collection of semantically similar elements. (Inherited from Element)
Dispatcher	(Inherited from BindableObject)
EffectControlProvider	For internal use by the Xamarin.Forms platform. (Inherited from Element)
Effects	A list of the effects that are applied to this item. (Inherited from Element)
Id	Gets a value that can be used to uniquely identify an element through the run of an application. (Inherited from Element)
LogicalChildren	For internal use by the Xamarin.Forms platform. (Inherited from Element)
Parent	Gets or sets the parent element of the element. (Inherited from Element)
ParentView	Obsolete. Gets the element which is the closest ancestor of this element that is a VisualElement. (Inherited from Element)
Platform	Obsolete. (Inherited from Element)
RealParent	For internal use by the Xamarin.Forms platform. (Inherited from Element)
StyleId	Gets or sets a user defined value to uniquely identify the element. (Inherited from Element)

Methods

ApplyBindings()	Apply the bindings to BindingContext. (Inherited from BindableObject)
ClearValue(BindableProperty)	Clears any value set by SetValue for `property`. (Inherited from BindableObject)
ClearValue(BindablePropertyKey)	Clears any value set by SetValue for the property that is identified by `propertyKey`. (Inherited from BindableObject)
CoerceValue(BindableProperty)	(Inherited from BindableObject)
CoerceValue(BindablePropertyKey)	(Inherited from BindableObject)
Descendants()	For internal use by the Xamarin.Forms platform. (Inherited from Element)
EffectIsAttached(String)	For internal use by the Xamarin.Forms platform. (Inherited from Element)
FindByName(String)	Returns the element that has the specified name. (Inherited from Element)
GetValue(BindableProperty)	Returns the value that is contained in the BindableProperty. (Inherited from BindableObject)
GetValues(BindableProperty, BindableProperty, BindableProperty)	Obsolete. For internal use by the Xamarin.Forms platform. (Inherited from BindableObject)
GetValues(BindableProperty, BindableProperty)	Obsolete. For internal use by the Xamarin.Forms platform. (Inherited from BindableObject)
IsSet(BindableProperty)	Returns `true` if the target property exists and has been set. (Inherited from BindableObject)
OnBindingContextChanged()	Invoked whenever the binding context of the element changes. Implement this method to add class handling for this event. (Inherited from Element)
OnChildAdded(Element)	Invoked whenever the ChildAdded event needs to be emitted. Implement this method to add class handling for this event. (Inherited from Element)
OnChildRemoved(Element, Int32)	(Inherited from Element)
OnChildRemoved(Element)	Obsolete. Invoked whenever the ChildRemoved event needs to be emitted. Implement this method to add class handling for this event. (Inherited from Element)
OnParentSet()	Invoked whenever the Parent of an element is set. Implement this method in order to add behavior when the element is added to a parent. (Inherited from Element)
OnPropertyChanged(String)	Method that is called when a bound property is changed. (Inherited from Element)
OnPropertyChanging(String)	Call this method from a child class to notify that a change is going to happen on a property. (Inherited from BindableObject)
RemoveBinding(BindableProperty)	Removes a previously set binding. (Inherited from BindableObject)
RemoveDynamicResource(BindableProperty)	Removes a previously set dynamic resource (Inherited from Element)
SetBinding(BindableProperty, BindingBase)	Assigns a binding to a property. (Inherited from BindableObject)
SetDynamicResource(BindableProperty, String)	Sets the BindableProperty property of this element to be updated via the DynamicResource with the provided key. (Inherited from Element)
SetValue(BindableProperty, Object)	Sets the value of the specified property. (Inherited from BindableObject)
SetValue(BindablePropertyKey, Object)	Sets the value of the propertyKey. (Inherited from BindableObject)
SetValueCore(BindableProperty, Object, SetValueFlags)	For internal use by the Xamarin.Forms platform. (Inherited from BindableObject)
SetValueFromRenderer(BindableProperty, Object)	For internal use by the Xamarin.Forms platform. (Inherited from Element)
SetValueFromRenderer(BindablePropertyKey, Object)	For internal use by the Xamarin.Forms platform. (Inherited from Element)
UnapplyBindings()	Unapplies all previously set bindings. (Inherited from BindableObject)

Events

BindingContextChanged	Raised whenever the BindingContext property changes. (Inherited from BindableObject)
ChildAdded	Occurs whenever a child element is added to the element. (Inherited from Element)
ChildRemoved	Occurs whenever a child element is removed from the element. (Inherited from Element)
DescendantAdded	Occurs whenever a child element is added to the elements subtree. (Inherited from Element)
DescendantRemoved	Occurs whenever a child element is removed from the elements subtree. (Inherited from Element)
PlatformSet	Obsolete. (Inherited from Element)
PropertyChanged	Raised when a property has changed. (Inherited from BindableObject)
PropertyChanging	Raised when a property is about to change. (Inherited from BindableObject)

Explicit Interface Implementations

IDynamicResourceHandler.SetDynamicResource(BindableProperty, String)	For internal use by the Xamarin.Forms platform. (Inherited from BindableObject)
IElementController.SetValueFromRenderer(BindableProperty, Object)	For internal use by the Xamarin.Forms platform. (Inherited from Element)
INameScope.RegisterName(String, Object)	For internal use only. (Inherited from Element)

Extension Methods

GetPropertyIfSet<T>(BindableObject, BindableProperty, T)
SetAppThemeColor(BindableObject, BindableProperty, Color, Color)
SetBinding(BindableObject, BindableProperty, String, BindingMode, IValueConverter, String)	Creates and applies a binding to a property.
SetBinding<TSource>(BindableObject, BindableProperty, Expression<Func<TSource,Object>>, BindingMode, IValueConverter, String)	Obsolete. Creates and applies a binding from an expression.
SetOnAppTheme<T>(BindableObject, BindableProperty, T, T)
FindByName<T>(Element, String)	Returns the instance of type `T` that has name `name` in the scope that includes `element`.

Applies to

共用方式為