先来看看效果图
这个效果写起来挺简单，主要运用下面几个知识点
layer 的mask : 图层蒙版
layer 的shadowpath ： 绘制自定义形状阴影
uibezierpath ：绘制六边形路线
说完知识点下面上代码了
绘制六边形的路线
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-(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 addlinetopoint:cgpointmake((viewwidth / 2), 0)];
[path addlinetopoint:cgpointmake(viewwidth - ((sin(m_1_pi / 180 * 60)) * (viewwidth / 2)), (viewwidth / 4))];
[path addlinetopoint: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;
}
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绘制一个六边形的layer，并把image 赋值到contents 上
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cgrect hexagnorect = self.bounds;
//绘制一个六边形的layer，并复制一个image给他的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);
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创建一个calayer，将六边形layer 添加到calayer上,并绘制模糊阴影
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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];
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总结
好了，以上就是在ios中实现图片六边形的全部内容了，希望本文能对大家开发ios有所帮助，如果有疑问大家可以留言交流。