float begainAngle ＝ 0.0f;

CGAffineTransform afterAngle = CGAffineTransformMakeRotation(begainAngle * (M_PI / 180.0f));

[UIView animateWithDuration:0.01 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{

iConImage.transform = afterAngle;

} completion:^(BOOL finished) {

begainAngle += 2;

[self startAnimation];

}];