Lvalue required as left operand of assignment error

Hello I get the "Lvalue required as left operand of assignment" error in xcode. Why? Here is my code (window1/2 are UIViewController) : - (void)loadView { UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0,0,320,460)]; UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(0,0,640,460)]; self.window1 = [TweetViewController alloc]; self.window2 = [InfoViewController alloc]; [contentView addSubview:self.window1.view]; self.window2.view.frame.origin.x = 320; //HERE IS THE ERROR!! [contentView addSubview:self.window2.view]; [scrollView addSubview:contentView]; scrollView.contentSize = contentView.frame.size; scrollView.pagingEnabled = YES; self.view = scrollView; [contentView release]; [scrollView release]; } The part self.window2.view.frame will leave you with a getter, not actually reaching into and grabbing the internal frame CGRect. What you need to do is get the CGRect change it and then set it back into the view. CGRect f = self.window2.view.frame; // calls the getter f.origin.x = 320; self.window2.view.frame = f; // calls the setter

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