NSFileProviderExtension.FetchThumbnailsAsync Method

Definition

Namespace:

UIKit

Assembly:

Xamarin.iOS.dll

Overloads

FetchThumbnailsAsync(NSString[], CGSize, NSFileProviderExtensionFetchThumbnailsHandler)	When implemented by the developer, fetches thumbnails for the specified item identifiers, runs the specified perThumbnailCompletionHandler for each thumbnail, and runs completionHandler when the entire operation is complete
FetchThumbnailsAsync(NSString[], CGSize, NSFileProviderExtensionFetchThumbnailsHandler, NSProgress)	When implemented by the developer, asynchronously fetches thumbnails for the specified item identifiers, runs the specified perThumbnailCompletionHandler for each thumbnail, and updates the progress result, returning a task that represents the operation.

FetchThumbnailsAsync(NSString[], CGSize, NSFileProviderExtensionFetchThumbnailsHandler)

When implemented by the developer, fetches thumbnails for the specified item identifiers, runs the specified perThumbnailCompletionHandler for each thumbnail, and runs completionHandler when the entire operation is complete

[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 11, 0, ObjCRuntime.PlatformArchitecture.All, null)]
public virtual System.Threading.Tasks.Task FetchThumbnailsAsync (Foundation.NSString[] itemIdentifiers, CoreGraphics.CGSize size, UIKit.NSFileProviderExtensionFetchThumbnailsHandler perThumbnailCompletionHandler);

abstract member FetchThumbnailsAsync : Foundation.NSString[] * CoreGraphics.CGSize * UIKit.NSFileProviderExtensionFetchThumbnailsHandler -> System.Threading.Tasks.Task
override this.FetchThumbnailsAsync : Foundation.NSString[] * CoreGraphics.CGSize * UIKit.NSFileProviderExtensionFetchThumbnailsHandler -> System.Threading.Tasks.Task

Parameters

itemIdentifiers

NSString[]

The persistent identifiers for the items.

size

CGSize

The size, in pixels, of the thumbnails.

perThumbnailCompletionHandler

NSFileProviderExtensionFetchThumbnailsHandler

A handler to run for each thumbnail.

Returns

Task

A task that represents the asynchronous FetchThumbnails operation

Attributes

IntroducedAttribute

Remarks

(More documentation for this node is coming)

This can be used from a background thread.

The FetchThumbnailsAsync method is suitable to be used with C# async by returning control to the caller with a Task representing the operation.

(More documentation for this node is coming)

This can be used from a background thread.

FetchThumbnailsAsync(NSString[], CGSize, NSFileProviderExtensionFetchThumbnailsHandler, NSProgress)

When implemented by the developer, asynchronously fetches thumbnails for the specified item identifiers, runs the specified perThumbnailCompletionHandler for each thumbnail, and updates the progress result, returning a task that represents the operation.

[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 11, 0, ObjCRuntime.PlatformArchitecture.All, null)]
public virtual System.Threading.Tasks.Task FetchThumbnailsAsync (Foundation.NSString[] itemIdentifiers, CoreGraphics.CGSize size, UIKit.NSFileProviderExtensionFetchThumbnailsHandler perThumbnailCompletionHandler, out Foundation.NSProgress result);

abstract member FetchThumbnailsAsync : Foundation.NSString[] * CoreGraphics.CGSize * UIKit.NSFileProviderExtensionFetchThumbnailsHandler *  -> System.Threading.Tasks.Task
override this.FetchThumbnailsAsync : Foundation.NSString[] * CoreGraphics.CGSize * UIKit.NSFileProviderExtensionFetchThumbnailsHandler *  -> System.Threading.Tasks.Task

Parameters

itemIdentifiers

NSString[]

The persistent identifiers for the items.

size

CGSize

The size, in pixels, of the thumbnails.

perThumbnailCompletionHandler

NSFileProviderExtensionFetchThumbnailsHandler

A handler to run for each thumbnail.

result

NSProgress

Returns

Task

Attributes

IntroducedAttribute

Remarks

(More documentation for this node is coming)

This can be used from a background thread.