先來看看後果圖

這個後果寫起來挺簡略，重要應用上面幾個常識點

     layer 的mask : 圖層蒙版

     layer 的shadowPath ： 繪制自界說外形暗影

     UIBezierPath ：繪制六邊形道路

說完常識點上面上代碼了

繪制六邊形的道路

-(CGPathRef)getCGPath:(CGFloat)viewWidth{
 UIBezierPath * path = [UIBezierPath bezierPath];
 path.lineWidth = 2;
 [[UIColor whiteColor] setStroke];
 [path moveToPoint:CGPointMake((sin(M_1_PI / 180 * 60)) * (viewWidth / 2), (viewWidth / 4))];
 [path addL.netoPoint:CGPointMake((viewWidth / 2), 0)];
 [path addL.netoPoint:CGPointMake(viewWidth - ((sin(M_1_PI / 180 * 60)) * (viewWidth / 2)), (viewWidth / 4))];
 [path addL.netoPoint:CGPointMake(viewWidth - ((sin(M_1_PI / 180 * 60)) * (viewWidth / 2)), (viewWidth / 2) + (viewWidth / 4))];
 [path addLineToPoint:CGPointMake((viewWidth / 2), viewWidth)];
 [path addLineToPoint:CGPointMake((sin(M_1_PI / 180 * 60)) * (viewWidth / 2), (viewWidth / 2) + (viewWidth / 4))];
 [path closePath];
 return path.CGPath;
}

繪制一個六邊形的layer，並把image 賦值到contents 上

 CGRect hexagnoRect = self.bounds;
 //繪制一個六邊形的layer，並復制一個image給他的contents
 CALayer *hexagonLayer = [CALayer layer];
 hexagonLayer.frame = hexagnoRect;
 CAShapeLayer * shapLayer = [CAShapeLayer layer];
 shapLayer.lineWidth = 1;
 shapLayer.strokeColor = [UIColor whiteColor].CGColor;
 shapLayer.path = [self getCGPath:hexagnoRect.size.width-20];
 hexagonLayer.mask = shapLayer;
 hexagonLayer.contents = (__bridge id _Nullable)(self.image.CGImage);

創立一個CALayer，將六邊形layer 添加到CALayer上,並繪制隱約暗影

 CALayer *completeLayer = [CALayer layer];
 completeLayer.frame = CGRectMake(10, 10, self.bounds.size.width-10, self.bounds.size.height-10);
 [completeLayer addSublayer:hexagonLayer];
 completeLayer.shadowOpacity = 1.0f;
 completeLayer.shadowPath = [self getCGPath:hexagnoRect.size.width];
 completeLayer.shadowOffset = CGSizeMake(-10, -10);

 completeLayer.shadowColor = self.hg_shadowColor.CGColor;
 [self.layer addSublayer:completeLayer];

總結

好了，以上就是在IOS中完成圖片六邊形的全體內容了，願望本文能對年夜家開辟IOS有所贊助，假如有疑問年夜家可以留言交換。

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