UIViewPropertyAnimator Constructors
Definition
Important
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Overloads
| UIViewPropertyAnimator() |
Default constructor. |
| UIViewPropertyAnimator(NSObjectFlag) |
Constructor to call on derived classes to skip initialization and merely allocate the object. |
| UIViewPropertyAnimator(IntPtr) |
A constructor used when creating managed representations of unmanaged objects; Called by the runtime. |
| UIViewPropertyAnimator(Double, IUITimingCurveProvider) |
Constructs a new UIViewPropertyAnimator with the specified |
| UIViewPropertyAnimator(Double, nfloat, Action) |
Constructs a new UIViewPropertyAnimator with spring-based timing based on the . |
| UIViewPropertyAnimator(Double, UIViewAnimationCurve, Action) |
Constructs a UIViewPropertyAnimator with the specified |
| UIViewPropertyAnimator(Double, CGPoint, CGPoint, Action) |
UIViewPropertyAnimator()
Default constructor.
[Foundation.Export("init")]
public UIViewPropertyAnimator ();- Attributes
Applies to
UIViewPropertyAnimator(NSObjectFlag)
Constructor to call on derived classes to skip initialization and merely allocate the object.
protected UIViewPropertyAnimator (Foundation.NSObjectFlag t);new UIKit.UIViewPropertyAnimator : Foundation.NSObjectFlag -> UIKit.UIViewPropertyAnimatorParameters
Unused sentinel value, pass NSObjectFlag.Empty.
Remarks
This constructor should be called by derived classes when they completely construct the object in managed code and merely want the runtime to allocate and initialize the NSObject. This is required to implement the two-step initialization process that Objective-C uses, the first step is to perform the object allocation, the second step is to initialize the object. When developers invoke the constructor that takes the NSObjectFlag.Empty they take advantage of a direct path that goes all the way up to NSObject to merely allocate the object's memory and bind the Objective-C and C# objects together. The actual initialization of the object is up to the developer.
This constructor is typically used by the binding generator to allocate the object, but prevent the actual initialization to take place. Once the allocation has taken place, the constructor has to initialize the object. With constructors generated by the binding generator this means that it manually invokes one of the "init" methods to initialize the object.
It is the developer's responsibility to completely initialize the object if they chain up using the NSObjectFlag.Empty path.
In general, if the developer's constructor invokes the NSObjectFlag.Empty base implementation, then it should be calling an Objective-C init method. If this is not the case, developers should instead chain to the proper constructor in their class.
The argument value is ignored and merely ensures that the only code that is executed is the construction phase is the basic NSObject allocation and runtime type registration. Typically the chaining would look like this:
//
// The NSObjectFlag merely allocates the object and registers the
// C# class with the Objective-C runtime if necessary, but no actual
// initXxx method is invoked, that is done later in the constructor
//
// This is taken from Xamarin.iOS's source code:
//
[Export ("initWithFrame:")]
public UIView (System.Drawing.RectangleF frame) : base (NSObjectFlag.Empty)
{
// Invoke the init method now.
var initWithFrame = new Selector ("initWithFrame:").Handle;
if (IsDirectBinding)
Handle = ObjCRuntime.Messaging.IntPtr_objc_msgSend_CGRect (this.Handle, initWithFrame, frame);
else
Handle = ObjCRuntime.Messaging.IntPtr_objc_msgSendSuper_CGRect (this.SuperHandle, initWithFrame, frame);
}
Applies to
UIViewPropertyAnimator(IntPtr)
A constructor used when creating managed representations of unmanaged objects; Called by the runtime.
protected internal UIViewPropertyAnimator (IntPtr handle);new UIKit.UIViewPropertyAnimator : nativeint -> UIKit.UIViewPropertyAnimatorParameters
- handle
-
IntPtr
nativeint
Pointer (handle) to the unmanaged object.
Remarks
This constructor is invoked by the runtime infrastructure (GetNSObject(IntPtr)) to create a new managed representation for a pointer to an unmanaged Objective-C object. Developers should not invoke this method directly, instead they should call the GetNSObject method as it will prevent two instances of a managed object to point to the same native object.
Applies to
UIViewPropertyAnimator(Double, IUITimingCurveProvider)
Constructs a new UIViewPropertyAnimator with the specified duration and timing.
[Foundation.Export("initWithDuration:timingParameters:")]
[ObjCRuntime.DesignatedInitializer]
public UIViewPropertyAnimator (double duration, UIKit.IUITimingCurveProvider parameters);new UIKit.UIViewPropertyAnimator : double * UIKit.IUITimingCurveProvider -> UIKit.UIViewPropertyAnimatorParameters
- duration
- Double
Duration, in seconds, of the animation.
- parameters
- IUITimingCurveProvider
The object that provides the timing curve.
- Attributes
Applies to
UIViewPropertyAnimator(Double, nfloat, Action)
Constructs a new UIViewPropertyAnimator with spring-based timing based on the .
[Foundation.Export("initWithDuration:dampingRatio:animations:")]
public UIViewPropertyAnimator (double duration, nfloat ratio, Action animations);new UIKit.UIViewPropertyAnimator : double * nfloat * Action -> UIKit.UIViewPropertyAnimatorParameters
- duration
- Double
- ratio
- nfloat
Values must be in the range [0,1]. Values closer to 0 have less damping.
- Attributes
Applies to
UIViewPropertyAnimator(Double, UIViewAnimationCurve, Action)
Constructs a UIViewPropertyAnimator with the specified duration , curve, and animations.
[Foundation.Export("initWithDuration:curve:animations:")]
public UIViewPropertyAnimator (double duration, UIKit.UIViewAnimationCurve curve, Action animations);new UIKit.UIViewPropertyAnimator : double * UIKit.UIViewAnimationCurve * Action -> UIKit.UIViewPropertyAnimatorParameters
- duration
- Double
The duration of the animation, in seconds.
- curve
- UIViewAnimationCurve
The animation curve.
- Attributes
Applies to
UIViewPropertyAnimator(Double, CGPoint, CGPoint, Action)
[Foundation.Export("initWithDuration:controlPoint1:controlPoint2:animations:")]
public UIViewPropertyAnimator (double duration, CoreGraphics.CGPoint point1, CoreGraphics.CGPoint point2, Action animations);new UIKit.UIViewPropertyAnimator : double * CoreGraphics.CGPoint * CoreGraphics.CGPoint * Action -> UIKit.UIViewPropertyAnimatorParameters
- duration
- Double
- point1
- CGPoint
- point2
- CGPoint
- animations
- Action
- Attributes