iOS开发为UIView设定阴影效果

来自:互联网
时间:2023-04-15
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UIView的阴影设置主要通过UIViewlayer的相关属性来设置

阴影的颜色

imgView.layer.shadowColor = [UIColor blackColor].CGColor;

阴影的透明度

imgView.layer.shadowOpacity = 0.8f;

阴影的圆角

imgView.layer.shadowRadius = 4.f;

阴影偏移量

imgView.layer.shadowOffset = CGSizeMake(4,4);
iOS开发为UIView设定阴影效果
imgView.layer.shadowOffset = CGSizeMake(0,0);
iOS开发为UIView设定阴影效果

其实从偏移量上可以看出来,即使偏移量为(0,0)时,围绕view的四周依然能看到一定阴影。

阴影的路径

除了通过上面的操作,我们还可以设定阴影的路径

//路径阴影
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(-5, -5)];
//添加直线
[path addLineToPoint:CGPointMake(pAIntingWidth /2, -15)];
[path addLineToPoint:CGPointMake(paintingWidth +5, -5)];
[path addLineToPoint:CGPointMake(paintingWidth +15, paintingHeight /2)];
[path addLineToPoint:CGPointMake(paintingWidth +5, paintingHeight +5)];
[path addLineToPoint:CGPointMake(paintingWidth /2, paintingHeight +15)];
[path addLineToPoint:CGPointMake(-5, paintingHeight +5)];
[path addLineToPoint:CGPointMake(-15, paintingHeight /2)];
[path addLineToPoint:CGPointMake(-5, -5)];
//设置阴影路径 
imgView.layer.shadowPath = path.CGPath;
iOS开发为UIView设定阴影效果
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