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UIView的暗影設置重要經由過程UIView的layer的相干屬性來設置

暗影的色彩

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

暗影的通明度

imgView.layer.shadowOpacity = 0.8f;

暗影的圓角

imgView.layer.shadowRadius = 4.f;

暗影偏移量

imgView.layer.shadowOffset = CGSizeMake(4,4);

imgView.layer.shadowOffset = CGSizeMake(0,0);

其實從偏移量上可以看出來，即便偏移量為(0,0)時，環繞view的周圍仍然能看到必定暗影。

暗影的途徑

除經由過程下面的操作，我們還可以設定暗影的途徑

//途徑暗影
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(-5, -5)];
//添加直線
[path addL.netoPoint:CGPointMake(paintingWidth /2, -15)];
[path addL.netoPoint:CGPointMake(paintingWidth +5, -5)];
[path addL.netoPoint: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)];
//設置暗影途徑 
imgView.layer.shadowPath = path.CGPath;

總結

以上就是這篇文章的全體內容，願望能對列位IOS開辟者們能有所贊助，假如有疑問年夜家可以留言交換。

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