UIView 旋转动画

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];

    }];