iOS 開發設定空間旋轉中心點的代碼

標籤：

//讓控制項以 [self setAnchorPoint:CGPointMake(0, 0) forView:smallImg];為中心點旋轉

//CGPointMake(0, 0)   控制項的左上方為中心點

//CGPointMake(1, 1)   控制項的右下角為中心點

- (void)setAnchorPoint:(CGPoint)anchorPoint forView:(UIView *)view

{

    CGPoint oldOrigin = view.frame.origin;

    view.layer.anchorPoint = anchorPoint;

    CGPoint newOrigin = view.frame.origin;

    

    CGPoint transition;

    transition.x = newOrigin.x - oldOrigin.x;

    transition.y = newOrigin.y - oldOrigin.y;

    

    view.center = CGPointMake (view.center.x - transition.x, view.center.y - transition.y);

}

 

iOS 開發設定空間旋轉中心點的代碼