| Inherits from | |
| Conforms to | |
| Framework | /System/Library/Frameworks/QuartzCore.framework |
| Availability | Available in iOS 2.0 and later. |
| Declared in | CAMediaTimingFunction.h |
| Companion guides |
CAMediaTimingFunction represents one segment of a function that defines the pacing of an animation as a timing curve. The function maps an input time normalized to the range [0,1] to an output time also in the range [0,1].
Creates and returns a new instance of CAMediaTimingFunction timing function modeled as a cubic Bézier curve using the specified control points.
+ (id)functionWithControlPoints:(float)c1x :(float)c1y :(float)c2x :(float)c2y
A floating point number representing the x position of the c1 control point.
A floating point number representing the y position of the c1 control point.
A floating point number representing the x position of the c2 control point.
A floating point number representing the y position of the c2 control point.
A new instance of CAMediaTimingFunction with the timing function specified by the provided control points.
The end points of the Bézier curve are automatically set to (0.0,0.0) and (1.0,1.0). The control points defining the Bézier curve are: [(0.0,0.0), (c1x,c1y), (c2x,c2y), (1.0,1.0)].
CAMediaTimingFunction.hCreates and returns a new instance of CAMediaTimingFunction configured with the predefined timing function specified by name.
+ (id)functionWithName:(NSString *)name
The timing function to use as specified in “Predefined timing functions”.
A new instance of CAMediaTimingFunction with the timing function specified by name.
CAMediaTimingFunction.hReturns the control point for the specified index.
- (void)getControlPointAtIndex:(size_t)index values:(float)ptr
An integer specifying the index of the control point to return.
A pointer to an array that, upon return, will contain the x and y values of the specified point.
The value of index must between 0 and 3.
CAMediaTimingFunction.hReturns an initialized timing function modeled as a cubic Bézier curve using the specified control points.
- (id)initWithControlPoints:(float)c1x :(float)c1y :(float)c2x :(float)c2y
A floating point number representing the x position of the c1 control point.
A floating point number representing the y position of the c1 control point.
A floating point number representing the x position of the c2 control point.
A floating point number representing the y position of the c2 control point.
An instance of CAMediaTimingFunction with the timing function specified by the provided control points.
The end points of the Bézier curve are automatically set to (0.0,0.0) and (1.0,1.0). The control points defining the Bézier curve are: [(0.0,0.0), (c1x,c1y), (c2x,c2y), (1.0,1.0)].
CAMediaTimingFunction.hThese constants are used to specify one of the predefined timing functions used by functionWithName:.
NSString * const kCAMediaTimingFunctionLinear; NSString * const kCAMediaTimingFunctionEaseIn; NSString * const kCAMediaTimingFunctionEaseOut; NSString * const kCAMediaTimingFunctionEaseInEaseOut; NSString * const kCAMediaTimingFunctionDefault;
kCAMediaTimingFunctionLinearSpecifies linear pacing. Linear pacing causes an animation to occur evenly over its duration.
Available in iOS 2.0 and later.
Declared in CAMediaTimingFunction.h.
kCAMediaTimingFunctionEaseInSpecifies ease-in pacing. Ease-in pacing causes the animation to begin slowly, and then speed up as it progresses.
Available in iOS 2.0 and later.
Declared in CAMediaTimingFunction.h.
kCAMediaTimingFunctionEaseOutSpecifies ease-out pacing. An ease-out pacing causes the animation to begin quickly, and then slow as it completes.
Available in iOS 2.0 and later.
Declared in CAMediaTimingFunction.h.
kCAMediaTimingFunctionEaseInEaseOutSpecifies ease-in ease-out pacing. An ease-in ease-out animation begins slowly, accelerates through the middle of its duration, and then slows again before completing.
Available in iOS 2.0 and later.
Declared in CAMediaTimingFunction.h.
kCAMediaTimingFunctionDefaultSpecifies the timing function used as the default by most animations. It approximates a Bézier timing function using the control points [(0.0,0.0), (0.25,0.1), (0.25,0.1), (1.0,1.0)]. By using this constant you ensure that your animations will use the current default timing.
Available in iOS 3.0 and later.
Declared in CAMediaTimingFunction.h.
Last updated: 2009-11-17