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  • 图片上加载阴影效果

            UIImageView *blowImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(label.frame)  + 8,CGRectGetWidth(self.view.bounds), 240)];

    //        //渐变图层

            UIView *view = [[UIView alloc]initWithFrame:blowImageView.bounds];

            

            CAGradientLayer *gradientLayer =  [CAGradientLayer layer];

            gradientLayer.frame = view.bounds;

            

    //        //设置颜色

            [gradientLayer setColors:[NSArray arrayWithObjects:(id)[[UIColor clearColor] CGColor],(id)[[UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:0.773922413793103] CGColor], nil]];

    //

    //        //每种颜色最亮的位置

            [gradientLayer setLocations:@[@0.5,@0.8]];

            //渐变的方向StartPoint>EndPoint

            [gradientLayer setStartPoint:CGPointMake(0.5, 0)];

            [gradientLayer setEndPoint:CGPointMake(0.5, 1)];

            blowImageView.image = [UIImage imageNamed:imageArray[index]];

            [view.layer insertSublayer:gradientLayer atIndex:0];

            [view addSubview:label];

            [blowImageView addSubview:view];

            [self.scrollView addSubview:blowImageView];

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  • 原文地址:https://www.cnblogs.com/Jenaral/p/5220476.html
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