uiimageview *imageview1 = [[uiimageview alloc]initwithframe:cgrectmake(0, 200, 320, 20)]; [self.view addsubview:imageview1]; uigraphicsbeginimagecontext(imageview1.frame.size); //开始画线 [imageview1.image drawinrect:cgrectmake(0, 0, imageview1.frame.size.width, imageview1.frame.size.height)]; cgcontextsetlinecap(uigraphicsgetcurrentcontext(), kcglinecapround); //设置线条终点形状 const cgfloat lengths[] = {5,3}; cgcontextref line = uigraphicsgetcurrentcontext(); cgcontextsetstrokecolorwithcolor(line, [uicolor redcolor].cgcolor); cgcontextsetlinedash(line, 0, lengths, 2); //画虚线 cgcontextmovetopoint(line, 0.0, 20.0); //开始画线 cgcontextaddlinetopoint(line, 310.0, 20.0); cgcontextstrokepath(line); imageview1.image = uigraphicsgetimagefromcurrentimagecontext();
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