iphone: view index

I have a view between other views, the order may vary. For example: viewA on top of viewB,开发者_如何学Python on top of viewC, or in another order.

Suppose I have

viewA, viewB, viewC, viewD and viewE

A is on the top and E on the bottom.

I need to replace viewC with viewZ, but I need to insert viewZ in the same index of viewC.

How do I know, before removing viewC, what index it has, so I can insert viewZ using

[self.view insertSubview:viewZ atIndex:?????)

and it will be at the same level?

thanks for any help.

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From How to get UIView hierarchy index ??? (i.e. the depth in between the other subviews)

int index = [[superView subviews] indexOfObject:viewC];

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Besides getting the index, you could also use -insertSubview:aboveSubview: (and …belowSubview:):

UIView* superview = self.view;
[superview insertSubview:viewZ aboveSubview:viewC];
[viewC removeFromSuperview];