ios - subViews only displayed when bezierPath is created using origin =0,0 and size = size of subView -

i trying improve uikit skills working on simple block breaking game. i.e view have 9 sub-views on top (each corresponding block) , have paddle , ball ball breaking blocks.

i have blockview class sub-class of uiview following init , drawrect: methods. noticing first block sub-view displayed when drawrect contains first statement (i.e bezierpath created framerect property) blockviews displayed when drawrect called when bezierpath created cgrect origin = 0,0 , appropriate size.

i have confirmed self.framerect has origin = columnblocksize, rowblockheight , appropriate size.

could please explain why bezierpath should created wth origin = 0,0 , not @ right offset 0,0?

is because of how drawrect called? i.e co-ordinate system has been translated when drawrect called on sub-view corresponding blockview

-(instancetype) initwithframe:(cgrect)frame andcolor:(int) color {     self = [super initwithframe:frame];      if (self)     {         self.color = color;         self.framerect = frame;     }      return self; }  - (void)drawrect:(cgrect)rect {     //using statement create bezierpaths shows first block         //uibezierpath *block = [uibezierpath bezierpathwithrect:self.framerect];      //using sequence, results in displaying blocks     cgrect blockrect = cgrectmake(0, 0,  self.bounds.size.width, self.bounds.size.height);     uibezierpath *block = [uibezierpath bezierpathwithrect:blockrect];          switch (self.color)         {             case red:                 [[uicolor redcolor] setfill];                 break;             case blue:                 [[uicolor bluecolor] setfill];                 break;             case green:                 [[uicolor greencolor] setfill];                 break;             default:                 break;         }         [block fill]; }