Add an animation when the iOS button appears.

Add an animation when the iOS button appears.

// Animation effect when a button appears

+ (Void) buttonAnimation :( UIButton *) sender {

CAKeyframeAnimation * animation = [CAKeyframeAnimation animationWithKeyPath: @ "transform"];

CATransform3D scale1 = CATransform3DMakeScale (0.5, 0.5, 1 );

CATransform3D scale2 = CATransform3DMakeScale (1.2, 1.2, 1 );

CATransform3D scale3 = CATransform3DMakeScale (0.9, 0.9, 1 );

CATransform3D scale4 = CATransform3DMakeScale (1.0, 1.0, 1 );

NSArray * frameValues = [NSArray arrayWithObjects:

[NSValue valueWithCATransform3D: scale1],

[NSValue valueWithCATransform3D: scale2],

[NSValue valueWithCATransform3D: scale3],

[NSValue valueWithCATransform3D: scale4],

Nil];

[Animation setValues: frameValues];

NSArray * frameTimes = [NSArray arrayWithObjects:

[NSNumber numberWithFloat: 0.0],

[NSNumber numberWithFloat: 0.5],

[NSNumber numberWithFloat: 0.9],

[NSNumber numberWithFloat: 1.0],

Nil];

[Animation setKeyTimes: frameTimes];

Animation. fillMode = kCAFillModeForwards;

Animation. duration = 0.3f;

[Sender. layer addAnimation: animation forKey: @ "DSPopUpAnimation"];

}