iOS 畫一個扇形不是從頂點

CAShapeLayer *layer = [[CAShapeLayeralloc]init];     UIBezierPath *originPath = [UIBezierPathbezierPath];     //起始中心點改一下     [originPath moveToPoint:CGPointMake(200,200)];     //順和逆交叉的相互抵消     [origin

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