IOS开发之为视图绘制单(多)个圆角实例代码

ios开发之为视图绘制单(多)个圆角实例代码

前言：

为视图绘制圆角，圆角可以选左上角、左下角、右下角、右上角、全部圆角

//core raduias

uiview *actionview = [[uiview alloc]initwithframe:cgrectmake(0, 0, 200, 200)];
uibezierpath *maskpath = [uibezierpath bezierpathwithroundedrect:actionview.bounds byroundingcorners:uirectcornertopright | uirectcornerbottomright cornerradii:cgsizemake(20, 20)];
cashapelayer *masklayer = [[cashapelayer alloc] init];
masklayer.frame = actionview.bounds;
masklayer.path = maskpath.cgpath;
actionview.layer.mask = masklayer;

uirectcorner枚举值如下:

typedef ns_options(nsuinteger, uirectcorner) {

  uirectcornertopleft   = 1 << 0,
  uirectcornertopright  = 1 << 1,
  uirectcornerbottomleft = 1 << 2,
  uirectcornerbottomright = 1 << 3,
  uirectcornerallcorners = ~0ul
};

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