cashapelayer *shapelayer = [cashapelayer layer];
[shapelayer setbounds:self.view.bounds];
[shapelayer setposition:self.view.center];
[shapelayer setfillcolor:[[uicolor clearcolor] cgcolor]];
// 設定虛線顏色為blackcolor
[shapelayer setstrokecolor:[[uicolor blackcolor] cgcolor]];
[shapelayer setstrokecolor:[[uicolor colorwithred:223/255.0 green:223/255.0 blue:223/255.0 alpha:1.0f] cgcolor]];
// 3.0f設定虛線的寬度
[shapelayer setlinewidth:1.0f];
[shapelayer setlinejoin:kcalinejoinround];
// 3=線的寬度 1=每條線的間距
[shapelayer setlinedashpattern:
[nsarray arraywithobjects:[nsnumber numberwithint:3],
[nsnumber numberwithint:1],nil]];
// setup the path
cgmutablepathref path = cgpathcreatemutable();
cgpathmovetopoint(path, null, 0, 89);
cgpathaddlinetopoint(path, null, 320,89);
// setup the path
cgmutablepathref path1 = cgpathcreatemutable();
// 0,10代表初始座標的x，y
// 320,10代表初始座標的x，y
cgpathmovetopoint(path1, null, 0, 100);
cgpathaddlinetopoint(path1, null, 320,100);
[shapelayer setpath:path];
cgpathrelease(path1);
// 可以把self改成任何你想要的uiview, 下圖演示就是放到uitableviewcell中的
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