How to dynamically set the height of the UITableView tableheader in AutoLayout mode

A recent problem is the use of a separate xib file AutoLayout to create a UITableView tableheader. This xib is a dynamic-height view.

So there is a problem, the view created with Xib is fixed height, if used directly:

M_contenttableview.tableheaderview= Headerview;

Such a statement to set Headerview, then the Headerview will always be a fixed height, if the content is too large to display incomplete, if the content is too small, then left a blank.

Tried the Headview internally with a variable m_bneedheight to record the height of the headerview inside the actual need, and then at each time this

M_bneedheight, modify the Headerview Frame outside, the code is as follows:

-(void) onneedsheightchanged: (cgfloat) nneedsheight

{

Circledetailsheaderview * Headerview = [self getheaderview];

if (Headerview)

{

CGRect frame = headerview.frame;

Frame.size.height = Nneedsheight;

Headerview.frame = frame;

}

}

This is good, haha, run, found the egg, which is not a bird.

What's the problem?

Finding the following is the ultimate problem-solving code:

-(void) onneedsheightchanged: (cgfloat) nneedsheight

{

Circledetailsheaderview * Headerview = [self getheaderview];

if (Headerview)

{

CGRect frame = headerview.frame;

Frame.size.height = Nneedsheight;

Headerview.frame = frame;

M_contenttableview.tableheaderview = Headerview;

}

That is, not only to reset the frame, but also to re-assign the value to TableView, so that TableView will go to the layout of the outside to assign the value of the past Headerview position and size.