iOS為UIView設(shè)置陰影效果

2020-07-26 03:10:26

字體：大中小

供稿：網(wǎng)友

UIView的陰影設(shè)置主要通過UIView的layer的相關(guān)屬性來設(shè)置

陰影的顏色

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

陰影的透明度

imgView.layer.shadowOpacity = 0.8f;

陰影的圓角

imgView.layer.shadowRadius = 4.f;

陰影偏移量

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

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

其實(shí)從偏移量上可以看出來，即使偏移量為(0,0)時(shí)，圍繞view的四周依然能看到一定陰影。

陰影的路徑

除了通過上面的操作，我們還可以設(shè)定陰影的路徑

//路徑陰影UIBezierPath *path = [UIBezierPath bezierPath];[path moveToPoint:CGPointMake(-5, -5)];//添加直線[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)];//設(shè)置陰影路徑 imgView.layer.shadowPath = path.CGPath;