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UITableViewでSectionHeader/SectionFooterを残さない方法

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UITableVieで、デフォルトではSectionHeader/SectionFooterが
常に見えるようにスクロールしますよね?
それを残さずに一緒にスクロールさせる方法です。

#SectionHeader

SectionHeaderHeightについては、調整してください。

MyTableViewController.m
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
	// SectionHeaderの高さ
	CGFloat sectionHeaderHeight = [[self tableView] sectionHeaderHeight];
	CGFloat offsetY = [scrollView contentOffset].y;
	
	if ( offsetY <= sectionHeaderHeight && offsetY >= 0.f ) {
		[scrollView setContentInset:UIEdgeInsetsMake( -offsetY, 0.f, 0.f, 0.f )];
	}
	else if ( offsetY >= sectionHeaderHeight ) {
		[scrollView setContentInset:UIEdgeInsetsMake( -sectionHeaderHeight, 0.f, 0.f, 0.f )];
	}
}

#SectionFooter

SectionFooterHeightについては、調整してください。

MyTableViewController.m
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
	// SectionFooterの高さ
	CGFloat sectionFooterHeight = [[self tableView] sectionFooterHeight];
	CGFloat offsetY = [scrollView contentOffset].y;
	CGFloat contentHeight = [scrollView contentSize].height;
	CGFloat bottomHeight = contentHeight - CGRectGetHeight( [scrollView bounds] );
	
	if ( bottomHeight - sectionFooterHeight <= offsetY && contentHeight > 0.f ) {
		[scrollView setContentInset:UIEdgeInsetsZero];
	}
	else {
		[scrollView setContentInset:UIEdgeInsetsMake( 0.f, 0.f, -sectionFooterHeight, 0.f )];
	}
}

#初期表示時にズレが生じる場合

MyTableViewController.m
- (void)viewDidLoad {
	[super viewDidLoad];
	
	[self scrollViewDidScroll:[self tableView]];
}
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