UIActivityItemProvider UIActivityItemProvider Class

Definition

Abstract class that, when subtyped, can be a proxy for the data of a UIActivity.

[Foundation.Register("UIActivityItemProvider", true)]
[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 6, 0, ObjCRuntime.PlatformArchitecture.All, null)]
[ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.TvOS, ObjCRuntime.PlatformArchitecture.All, null)]
public class UIActivityItemProvider : Foundation.NSOperation, IDisposable, UIKit.IUIActivityItemSource
type UIActivityItemProvider = class
    inherit NSOperation
    interface IUIActivityItemSource
    interface INativeObject
    interface IDisposable
Inheritance
UIActivityItemProviderUIActivityItemProvider
Attributes
Implements

Remarks

This class can be used to provide lightweight proxy data to a UIActivityViewController. Difference services represented by UIActivity classes might require additional processing of the data being sent (for example, one service might take text wrapped in HTML tags while another might require straight text, a service might require images to be converted to a certain format or size, etc.). Rather than perform all that potentially expensive processing for every possible service, a UIActivityItemProvider can be used. Once a the particular service is chosen, the Item property is accessed and the needed processing can be performed by the application.

If processing is minimal, application developers may choose to implement UIActivityItemSource rather than subclass UIActivityItemProvider.

The members of this class can be used from a background thread.

Constructors

UIActivityItemProvider() UIActivityItemProvider()

Default constructor, initializes a new instance of this class.

UIActivityItemProvider(IntPtr) UIActivityItemProvider(IntPtr)

A constructor used when creating managed representations of unmanaged objects; Called by the runtime.

UIActivityItemProvider(NSObject) UIActivityItemProvider(NSObject)
UIActivityItemProvider(NSObjectFlag) UIActivityItemProvider(NSObjectFlag)

Constructor to call on derived classes to skip initialization and merely allocate the object.

Properties

ActivityType ActivityType

A string identifying the type of activity.

Asynchronous Asynchronous Inherited from NSOperation
Class Class Inherited from NSObject
ClassHandle ClassHandle

The handle for this class.

CompletionBlock CompletionBlock Inherited from NSOperation
DebugDescription DebugDescription

A developer-meaningful description of this object.

(Inherited from NSObject)
Dependencies Dependencies

The operations on which this NSOperation is dependent.

(Inherited from NSOperation)
Description Description

Description of the object, the Objective-C version of ToString.

(Inherited from NSObject)
Handle Handle

Handle (pointer) to the unmanaged object representation.

(Inherited from NSObject)
IsCancelled IsCancelled

Whether this NSOperation has been cancelled.

(Inherited from NSOperation)
IsConcurrent IsConcurrent

Whether this operation runs asynchronously.

(Inherited from NSOperation)
IsDirectBinding IsDirectBinding Inherited from NSObject
IsExecuting IsExecuting

Whether this operation is currently executing.

(Inherited from NSOperation)
IsFinished IsFinished

Whether this operation is done executing.

(Inherited from NSOperation)
IsProxy IsProxy Inherited from NSObject
IsReady IsReady

Whether this operation can be performed now.

(Inherited from NSOperation)
Item Item

App devs must override this method, which is called on a background thread, as a factory method for the data-bearing object.

Name Name Inherited from NSOperation
PlaceholderItem PlaceholderItem

A placeholder item specified at initialization.

QualityOfService QualityOfService Inherited from NSOperation
QueuePriority QueuePriority

The priority of this operation in its operation queue.

(Inherited from NSOperation)
RetainCount RetainCount

Returns the current Objective-C retain count for the object.

(Inherited from NSObject)
Self Self Inherited from NSObject
Superclass Superclass Inherited from NSObject
SuperHandle SuperHandle

Handle used to represent the methods in the base class for this NSObject.

(Inherited from NSObject)
ThreadPriority ThreadPriority

The thread priority used when executing this operation.

(Inherited from NSOperation)
Zone Zone Inherited from NSObject

Methods

AddDependency(NSOperation) AddDependency(NSOperation)

Makes this NSOperation dependent on the completion of the specified NSOperation.

(Inherited from NSOperation)
AddObserver(NSObject, NSString, NSKeyValueObservingOptions, IntPtr) AddObserver(NSObject, NSString, NSKeyValueObservingOptions, IntPtr)

Registers an object for being observed externally (using NSString keyPath). Observed changes are dispatched to the observer’s object ObserveValue(NSString, NSObject, NSDictionary, IntPtr) method.

(Inherited from NSObject)
AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr) AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr)

Registers an object for being observed externally (using string keyPath). Observed changes are dispatched to the observer’s object ObserveValue(NSString, NSObject, NSDictionary, IntPtr) method.

(Inherited from NSObject)
AddObserver(NSString, NSKeyValueObservingOptions, Action<NSObservedChange>) AddObserver(NSString, NSKeyValueObservingOptions, Action<NSObservedChange>)

Registers an object for being observed externally using an arbitrary method.

(Inherited from NSObject)
AddObserver(String, NSKeyValueObservingOptions, Action<NSObservedChange>) AddObserver(String, NSKeyValueObservingOptions, Action<NSObservedChange>)

Registers an object for being observed externally using an arbitrary method.

(Inherited from NSObject)
AwakeFromNib() AwakeFromNib()

Called after the object has been loaded from the nib file. Overriders must call base.AwakeFromNib().

(Inherited from NSObject)
BeginInvokeOnMainThread(Action) BeginInvokeOnMainThread(Action) Inherited from NSObject
BeginInvokeOnMainThread(Selector, NSObject) BeginInvokeOnMainThread(Selector, NSObject)

Invokes asynchrously the specified code on the main UI thread.

(Inherited from NSObject)
Cancel() Cancel()

Requests that this NSOperation should stop executing its task.

(Inherited from NSOperation)
ConformsToProtocol(IntPtr) ConformsToProtocol(IntPtr)

Invoked to determine if this object implements the specified protocol.

(Inherited from NSObject)
Copy() Copy()

Performs a copy of the underlying Objective-C object.

(Inherited from NSObject)
DangerousAutorelease() DangerousAutorelease() Inherited from NSObject
DangerousRelease() DangerousRelease() Inherited from NSObject
DangerousRetain() DangerousRetain() Inherited from NSObject
DidChange(NSKeyValueChange, NSIndexSet, NSString) DidChange(NSKeyValueChange, NSIndexSet, NSString)

Indicates a change occurred to the indexes for a to-many relationship.

(Inherited from NSObject)
DidChange(NSString, NSKeyValueSetMutationKind, NSSet) DidChange(NSString, NSKeyValueSetMutationKind, NSSet) Inherited from NSObject
DidChangeValue(String) DidChangeValue(String)

Indicates that a change occurred on the specified key.

(Inherited from NSObject)
Dispose() Dispose()

Releases the resources used by the NSObject object.

(Inherited from NSObject)
Dispose(Boolean) Dispose(Boolean)

Releases the resources used by the NSObject object.

(Inherited from NSObject)
DoesNotRecognizeSelector(Selector) DoesNotRecognizeSelector(Selector)

Indicates that this object does not recognize the specified selector.

(Inherited from NSObject)
Equals(NSObject) Equals(NSObject) Inherited from NSObject
Equals(Object) Equals(Object) Inherited from NSObject
GetDataTypeIdentifierForActivity(UIActivityViewController, NSString) GetDataTypeIdentifierForActivity(UIActivityViewController, NSString)

If the specified provides NSData, this method returns the Uniform Type Identifier (UTI) of the item.

GetDictionaryOfValuesFromKeys(NSString[]) GetDictionaryOfValuesFromKeys(NSString[])

Retrieves the values of the specified keys.

(Inherited from NSObject)
GetHashCode() GetHashCode()

Generates a hash code for the current instance.

(Inherited from NSObject)
GetItemForActivity(UIActivityViewController, NSString) GetItemForActivity(UIActivityViewController, NSString)

Retrieves the data object on which to act.

GetMethodForSelector(Selector) GetMethodForSelector(Selector) Inherited from NSObject
GetNativeField(String) GetNativeField(String) Inherited from NSObject
GetNativeHash() GetNativeHash() Inherited from NSObject
GetPlaceholderData(UIActivityViewController) GetPlaceholderData(UIActivityViewController)

Retrieves the placeholder data.

GetSubjectForActivity(UIActivityViewController, NSString) GetSubjectForActivity(UIActivityViewController, NSString)

Returns the subject field for activities that have a subject.

GetThumbnailImageForActivity(UIActivityViewController, NSString, CGSize) GetThumbnailImageForActivity(UIActivityViewController, NSString, CGSize)

Returns a thumbnail for activities that support preview images.

Init() Init() Inherited from NSObject
InitializeHandle(IntPtr) InitializeHandle(IntPtr) Inherited from NSObject
InitializeHandle(IntPtr, String) InitializeHandle(IntPtr, String) Inherited from NSObject
Invoke(Action, Double) Invoke(Action, Double) Inherited from NSObject
Invoke(Action, TimeSpan) Invoke(Action, TimeSpan) Inherited from NSObject
InvokeOnMainThread(Action) InvokeOnMainThread(Action) Inherited from NSObject
InvokeOnMainThread(Selector, NSObject) InvokeOnMainThread(Selector, NSObject)

Invokes synchrously the specified code on the main UI thread.

(Inherited from NSObject)
IsEqual(NSObject) IsEqual(NSObject) Inherited from NSObject
IsKindOfClass(Class) IsKindOfClass(Class) Inherited from NSObject
IsMemberOfClass(Class) IsMemberOfClass(Class) Inherited from NSObject
Main() Main()

Executes this operation's non-concurrent task.

(Inherited from NSOperation)
MarkDirty() MarkDirty()

Promotes a regular peer object (IsDirectBinding is true) into a toggleref object.

(Inherited from NSObject)
MutableCopy() MutableCopy()

Creates a mutable copy of the specified NSObject.

(Inherited from NSObject)
ObserveValue(NSString, NSObject, NSDictionary, IntPtr) ObserveValue(NSString, NSObject, NSDictionary, IntPtr)

Indicates that the value at the specified keyPath relative to this object has changed.

(Inherited from NSObject)
PerformSelector(Selector) PerformSelector(Selector) Inherited from NSObject
PerformSelector(Selector, NSObject) PerformSelector(Selector, NSObject) Inherited from NSObject
PerformSelector(Selector, NSObject, Double) PerformSelector(Selector, NSObject, Double)

Invokes the selector on the current instance and if the obj is not null, it passes this as its single parameter.

(Inherited from NSObject)
PerformSelector(Selector, NSObject, Double, NSString[]) PerformSelector(Selector, NSObject, Double, NSString[]) Inherited from NSObject
PerformSelector(Selector, NSObject, NSObject) PerformSelector(Selector, NSObject, NSObject) Inherited from NSObject
PerformSelector(Selector, NSThread, NSObject, Boolean) PerformSelector(Selector, NSThread, NSObject, Boolean) Inherited from NSObject
PerformSelector(Selector, NSThread, NSObject, Boolean, NSString[]) PerformSelector(Selector, NSThread, NSObject, Boolean, NSString[]) Inherited from NSObject
PrepareForInterfaceBuilder() PrepareForInterfaceBuilder() Inherited from NSObject
RemoveDependency(NSOperation) RemoveDependency(NSOperation)

Makes this operation no longer dependent on the specified operation.

(Inherited from NSOperation)
RemoveObserver(NSObject, NSString) RemoveObserver(NSObject, NSString)

Stops the specified observer from receiving further notifications of changed values for the specified keyPath.

(Inherited from NSObject)
RemoveObserver(NSObject, NSString, IntPtr) RemoveObserver(NSObject, NSString, IntPtr)

Stops the specified observer from receiving further notifications of changed values for the specified keyPath and context.

(Inherited from NSObject)
RemoveObserver(NSObject, String) RemoveObserver(NSObject, String)

Stops the specified observer from receiving further notifications of changed values for the specified keyPath.

(Inherited from NSObject)
RemoveObserver(NSObject, String, IntPtr) RemoveObserver(NSObject, String, IntPtr)

Stops the specified observer from receiving further notifications of changed values for the specified keyPath and context.

(Inherited from NSObject)
RespondsToSelector(Selector) RespondsToSelector(Selector)

Whether this object recognizes the specified selector.

(Inherited from NSObject)
SetNativeField(String, NSObject) SetNativeField(String, NSObject) Inherited from NSObject
SetNilValueForKey(NSString) SetNilValueForKey(NSString)

Sets the value of the specified key to null.

(Inherited from NSObject)
SetValueForKey(NSObject, NSString) SetValueForKey(NSObject, NSString)

Sets the value of the property specified by the key to the specified value.

(Inherited from NSObject)
SetValueForKeyPath(IntPtr, NSString) SetValueForKeyPath(IntPtr, NSString)

A constructor used when creating managed representations of unmanaged objects; Called by the runtime.

(Inherited from NSObject)
SetValueForKeyPath(NSObject, NSString) SetValueForKeyPath(NSObject, NSString)

Sets the value of a property that can be reached using a keypath.

(Inherited from NSObject)
SetValueForUndefinedKey(NSObject, NSString) SetValueForUndefinedKey(NSObject, NSString)

Indicates an attempt to write a value to an undefined key. If not overridden, raises an NSUndefinedKeyException.

(Inherited from NSObject)
SetValuesForKeysWithDictionary(NSDictionary) SetValuesForKeysWithDictionary(NSDictionary)

Sets the values of this NSObject to those in the specified dictionary.

(Inherited from NSObject)
Start() Start()

Begins the execution of the operation.

(Inherited from NSOperation)
ToString() ToString()

Returns a string representation of the value of the current instance.

(Inherited from NSObject)
ValueForKey(NSString) ValueForKey(NSString)

Returns the value of the property associated with the specified key.

(Inherited from NSObject)
ValueForKeyPath(NSString) ValueForKeyPath(NSString)

Returns the value of a property that can be reached using a keypath.

(Inherited from NSObject)
ValueForUndefinedKey(NSString) ValueForUndefinedKey(NSString)

Indicates an attempt to read a value of an undefined key. If not overridden, raises an NSUndefinedKeyException.

(Inherited from NSObject)
WaitUntilFinished() WaitUntilFinished() Inherited from NSOperation
WaitUntilFinishedNS() WaitUntilFinishedNS()

Blocks the current thread until this operation finishes.

(Inherited from NSOperation)
WillChange(NSKeyValueChange, NSIndexSet, NSString) WillChange(NSKeyValueChange, NSIndexSet, NSString)

Indicates that the values of the specified indices in the specified key are about to change.

(Inherited from NSObject)
WillChange(NSString, NSKeyValueSetMutationKind, NSSet) WillChange(NSString, NSKeyValueSetMutationKind, NSSet) Inherited from NSObject
WillChangeValue(String) WillChangeValue(String)

Indicates that the value of the specified key is about to change.

(Inherited from NSObject)

Extension Methods

GetDebugDescription(INSObjectProtocol) GetDebugDescription(INSObjectProtocol)
GetAccessibilityCustomRotors(NSObject) GetAccessibilityCustomRotors(NSObject)

Gets the array of UIAccessibilityCustomRotor objects appropriate for this object.

SetAccessibilityCustomRotors(NSObject, UIAccessibilityCustomRotor[]) SetAccessibilityCustomRotors(NSObject, UIAccessibilityCustomRotor[])

Sets the array of UIAccessibilityCustomRotor objects appropriate for this object.

GetDataTypeIdentifierForActivity(IUIActivityItemSource, UIActivityViewController, NSString) GetDataTypeIdentifierForActivity(IUIActivityItemSource, UIActivityViewController, NSString)

If the specified provides NSData, this method returns the Uniform Type Identifier (UTI) of the item.

GetSubjectForActivity(IUIActivityItemSource, UIActivityViewController, NSString) GetSubjectForActivity(IUIActivityItemSource, UIActivityViewController, NSString)

Returns the subject for the specified .

GetThumbnailImageForActivity(IUIActivityItemSource, UIActivityViewController, NSString, CGSize) GetThumbnailImageForActivity(IUIActivityItemSource, UIActivityViewController, NSString, CGSize)

Returns the preview image for the specified .

Applies to

See also