UIScreen.CreateDisplayLink Method

Definition

Namespace:

UIKit

Assembly:

Xamarin.iOS.dll

Overloads

CreateDisplayLink(Action)	Registers a method to be invoked whenever the display screen needs to be updated.
CreateDisplayLink(NSObject, Selector)	Old-style registeration of a method to be invoked whenever the display screen needs to be updated.

CreateDisplayLink(Action)

Registers a method to be invoked whenever the display screen needs to be updated.

public CoreAnimation.CADisplayLink CreateDisplayLink (Action action);

member this.CreateDisplayLink : Action -> CoreAnimation.CADisplayLink

Parameters

action

Action

Delegate method to invoke when the screen needs to be updated.

Returns

CADisplayLink

The active display link that can be configured, read from and scheduled to deliver events.

CreateDisplayLink(NSObject, Selector)

Old-style registeration of a method to be invoked whenever the display screen needs to be updated.

[Foundation.Export("displayLinkWithTarget:selector:")]
public virtual CoreAnimation.CADisplayLink CreateDisplayLink (Foundation.NSObject target, ObjCRuntime.Selector sel);

abstract member CreateDisplayLink : Foundation.NSObject * ObjCRuntime.Selector -> CoreAnimation.CADisplayLink
override this.CreateDisplayLink : Foundation.NSObject * ObjCRuntime.Selector -> CoreAnimation.CADisplayLink

Parameters

target

NSObject

Target object

sel

Selector

Selector method to invoke on the target object.

Returns

CADisplayLink

Attributes

ExportAttribute

Remarks

You can configure the display link by setting the FrameInterval and Paused properties. Once you have done this, you need to add the display link to a run loop, which is the run loop that will be used to invoke the action method.

void Setup ()
{
    var link = UIScreen.CreateDisplayLink (this, new Selector ("callback")]

    // The default is 1, we want updates only once every 2 frames instead:
    link.FrameInterval = 2;
    link.AddToRunLoop (NSRunLoop.CurrentRunLoop, NSRunLoop.NSDefaultRunLoopMode);
}

[Export ("callback")]
void WillRefresh ()
{
    This method is invoked
}