2021-12-07

随机轮流翻转动画

要写一个随机的轮流翻转的动画，于是参照网上的修修改改，记录一下

//frameView父视图 images图片集合

//轮流翻转

/**

 * 翻转动画

 */

- (void)layerRotation:(UIView*)frameView list:(NSArray*)images {

    //随机数

    NSInteger  index = [ETUtilsToolgetRandomNumber:0to:images.count-1];

    WEAKSELF;

    for(inti=0; i < images.count; i++) {

        if(i == index) {

            UIImageView* imageV = [frameViewviewWithTag:100+ i];

            [self addLayerRotationWithImageV:imageV];

        }

    }

    ///第一次切换图片

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW,(int64_t)(1.0* NSEC_PER_SEC)),dispatch_get_main_queue(),^{

        for(inti =0; i < images.count; i++) {

            if(i == index) {

                UIImageView* imageV = [frameViewviewWithTag:100+ i];

                [weakSelf changeImg:imageV str:images[i]];

            }

        }

    });

    ///循环动画

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW,(int64_t)(5.0* NSEC_PER_SEC)),dispatch_get_main_queue(),^{

        [weakSelf layerRotation:frameView list:images];

    });

}

- (void)changeImg:(UIImageView*)imageV str:(NSString*)str

{

    if([imageV.image isEqual:[UIImage imageNamed:@"Classify_icon"]]) {

        [imageVsd_setImageWithURL:[NSURL URLWithString:str]];

    }else{

        imageV.image= [UIImage imageNamed:@"Classify_icon"];

    }

}

- (void)addLayerRotationWithImageV:(UIImageView *)imageV {

    CAKeyframeAnimation *keyAnimation = [CAKeyframeAnimation animation];

    // 旋转角度， 其中的value表示图像旋转的最终位置

    keyAnimation.values= [NSArrayarrayWithObjects:

                           [NSValue valueWithCATransform3D:CATransform3DMakeRotation(0, 0,1,0)],

                           [NSValue valueWithCATransform3D:CATransform3DMakeRotation((M_PI/2), 0,1,0)],

                           [NSValue valueWithCATransform3D:CATransform3DMakeRotation(0, 0,1,0)],

                           [NSValue valueWithCATransform3D:CATransform3DMakeRotation(0, 0,1,0)],

                           nil];

    keyAnimation.keyTimes = @[@(0),@(0.2),@(0.4),@(1.0)];//每一个的取值范围是0-1

    keyAnimation.duration=5.0;

    keyAnimation.repeatCount=1;

    [imageV.layeraddAnimation:keyAnimationforKey:@"transform"];

}

//参照：https://www.jianshu.com/p/12e973669a68