The coordinate transformation in the iOS development note--uiview

[OBJC]View plain Copy//convert pixel point from view to Target view, return the pixel value in the view of the target views-(Cgpoint) Convertpoint: (cgpoint) point Toview: (UIV   Iew *) view;      Converts the pixel point from view to the current view, returning the pixel value in the current View-(Cgpoint) Convertpoint: (cgpoint) point fromview: (UIView *) view;   Converts the rect from the Rect view to the target view, returning rect-(CGRect) Convertrect: (cgrect) rect toview: (UIView *) view in the target view; Converts rect from view to the current view, returning Rect-(CGRect) Convertrect in the current View: (CGRect) rect fromview: (UIView *) view;

The example converts the frame of Subview (BTN) in UITableViewCell to Controllera

[OBJC]   View plain  copy  // controllera  has a uitableview,  There are multiple lines in the UITableView Uitableviecell,cell with a button  //  Controllera:    = [cell convertRect:cell.btn.frame toView:self.view];   or    CGRect  rc = [self.view convertRect:cell.btn.frame fromView:cell];  //  This RC is btn in Controllera rect      or when known btn:   cgrect rc = [ btn.superview convertrect:btn.frame toview:self.view];   or    CGRect rc =  [self.view convertrect:btn.frame fromview:btn.superview];