动效：左右摇动（抖动）

动效：左右摇动（抖动）

CABasicAnimation* shake = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];shake.fromValue = [NSNumber numberWithFloat:-M_PI/32];shake.toValue = [NSNumber numberWithFloat:+M_PI/32];shake.duration = 0.1;shake.autoreverses = YES; //是否重复shake.repeatCount = 4;[self.shakeFeedbackOverlay.layer addAnimation:shake forKey:@"shakeAnimation"];self.shakeFeedbackOverlay.alpha = 1.0;[UIView animateWithDuration:2.0 delay:0.0 options:UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionAllowUserInteraction animations:^{ self.shakeFeedbackOverlay.alpha = 0.0; //透明度变0则消失 } completion:nil];

转自：.html