uiview *view = [[uiview alloc] initwithframe:(cgrectmake(0, 0, 100, 100))];
view.center = self.view.center;
[self.view addsubview:view];
view.backgroundcolor = [uicolor graycolor];
一、實線邊框
實線邊框.png
view.layer.bordercolor = [uicolor redcolor].cgcolor;
view.layer.borderwidth = 1;
二、虛線邊框
1.虛線邊框主要實現是通過增加乙個layer繪製乙個虛線的矩形，linedashpattern 第乙個引數代表線段長度，第二個引數代表線段間距。
cashapelayer *dottedlineborder = [[cashapelayer alloc] init];
dottedlineborder.frame = cgrectmake(0, 0, view.frame.size.width, view.frame.size.height);
[dottedlineborder setlinewidth:2];
[dottedlineborder setstrokecolor:[uicolor redcolor].cgcolor];
[dottedlineborder setfillcolor:[uicolor clearcolor].cgcolor];
dottedlineborder.linedashpattern = @[@10,@20];//10 - 線段長度 ，20 － 線段與線段間距
uibezierpath *path = [uibezierpath bezierpathwithrect:dottedlineborder.frame];
dottedlineborder.path = path.cgpath;
[view.layer addsublayer:dottedlineborder];
虛線.png
2.流動的虛線
有一些裁剪時會顯示乙個矩形虛線，而虛線還在流動。
這裡通過改變線的長度來實現虛線的流動，如果要求不嚴謹，只要粗略的實現這樣實現：
__block nsnumber * i = @10;
[nstimer scheduledtimerwithtimeinterval:0.5 repeats:yes block:^(nstimer * _nonnull timer) {
i = [nsnumber numberwithint:([i intvalue]+1)];
dottedlineborder.linedashpattern = @[i,@10];
if ([i intvalue]>=20) {
i = [nsnumber numberwithint:10];
三內邊距邊框
內邊距邊框.png
cgrect viewrect = view.frame;
cgfloat bordermargin = 20;//內邊距
cgsize borderoffset = cgsizemake(0, 0);//邊框x,y偏移量
uiview *lineview = [[uiview alloc]initwithframe:cgrectmake(viewrect.origin.x+borderoffset.width, viewrect.origin.y+borderoffset.height, viewrect.size.width, viewrect.size.height)];
[self.view addsubview:lineview];
cashapelayer *dottedlineborder = [[cashapelayer alloc] init];
dottedlineborder.frame = cgrectmake(-bordermargin/2, -bordermargin/2, view.frame.size.width+bordermargin*2, view.frame.size.height+bordermargin*2);
[dottedlineborder setlinewidth:2];
[dottedlineborder setstrokecolor:[uicolor redcolor].cgcolor];
[dottedlineborder setfillcolor:[uicolor clearcolor].cgcolor];
// dottedlineborder.linedashpattern = @[@10,@20];//10 - 線段長度 ，20 － 線段與線段間距
//矩形
uibezierpath *path = [uibezierpath bezierpathwithrect:dottedlineborder.frame];
dottedlineborder.path = path.cgpath;
[lineview.layer addsublayer:dottedlineborder];
[self.view sendsubviewtoback:lineview];
四、偏移的邊框
偏移邊框.png
設定borderoffset即可指定邊框的xy偏移量
五、指定某角為圓角的邊框
指定某角為圓角的邊框.png
uibezierpath *path = [uibezierpath bezierpathwithroundedrect:dottedlineborder.frame byroundingcorners:uirectcornertopleft|uirectcornertopright cornerradii:(cgsizemake(10, 10))];
六、圓形內鏤空的邊框
圓形鏤空邊框.png
/*圓形鏤空邊框*/
uibezierpath *path = [uibezierpath bezierpathwithovalinrect:dottedlineborder.frame];
uibezierpath *circlepath = [uibezierpath bezierpathwithrect:cgrectmake(bordermargin/2, bordermargin/2, lineview.frame.size.width, lineview.frame.size.height)];
[path setusesevenoddfillrule:yes];
dottedlineborder.fillrule = kcafillruleevenodd;
dottedlineborder.fillcolor = [uicolor redcolor].cgcolor;
七、詭異的邊框
詭異的邊框.png
uibezierpath *path = [uibezierpath bezierpathwithovalinrect:dottedlineborder.frame];
uibezierpath *circlepath = [uibezierpath bezierpathwithrect:(cgrectmake(0, 0, view.frame.size.width+bordermargin, view.frame.size.height+bordermargin))];
[path setusesevenoddfillrule:yes];
dottedlineborder.fillrule = kcafillruleevenodd;
dottedlineborder.fillcolor = [uicolor redcolor].cgcolor;
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