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Prepare UX rework

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- Bug Fix: the sticky headers display failed on screen rotation.
This commit is contained in:
Giom Foret
2017-04-20 19:17:22 +02:00
parent fead097bc0
commit 86013eb17c
1 changed files with 49 additions and 18 deletions
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Riot/ViewController/RecentsViewController.m
+49 -18
View File
@@ -271,6 +271,8 @@
frame.size.height -= self.bottomLayoutGuide.length;
tableViewMaskLayer.frame = frame;
}
[self refreshStickyHeadersContainersHeight];
}
#pragma mark - Override MXKRecentListViewController
@@ -509,22 +511,48 @@
{
if (_enableStickyHeaders)
{
UIView *firstDisplayedSectionHeader = displayedSectionHeaders.firstObject;
// Retrieve the first and the last headers actually visible in the recents table view.
// Caution: In some cases like the screen rotation, some displayed section headers are temporarily not visible.
UIView *firstDisplayedSectionHeader, *lastDisplayedSectionHeader;
CGFloat containerHeight;
CGFloat maxVisiblePosY = self.recentsTableView.contentOffset.y + (self.recentsTableView.frame.size.height - self.recentsTableView.contentInset.bottom);
for (UIView *header in displayedSectionHeaders)
{
if (!firstDisplayedSectionHeader)
{
if (header.frame.origin.y + header.frame.size.height > self.recentsTableView.contentOffset.y)
{
firstDisplayedSectionHeader = lastDisplayedSectionHeader = header;
}
}
else
{
if (header.frame.origin.y < maxVisiblePosY)
{
lastDisplayedSectionHeader = header;
}
else
{
break;
}
}
}
if (firstDisplayedSectionHeader)
{
// Check whether the header positon is not floating
// Consider the first visible section header to update the height of the top container of the sticky headers.
// Check whether the header positon is not floating.
if (firstDisplayedSectionHeader.frame.origin.y == firstDisplayedSectionHeaderPosY)
{
// Compute the height of the hidden part
// Compute the height of the hidden part.
CGFloat delta = self.recentsTableView.contentOffset.y - firstDisplayedSectionHeader.frame.origin.y;
if (delta < 0)
{
delta = 0;
}
// Update the layout of the top container of the sticky headers.
// Compute the top container height.
containerHeight = 0;
for (UIView *header in _stickyHeadersTopContainer.subviews)
{
@@ -566,15 +594,11 @@
self.stickyHeadersTopContainerHeightConstraint.constant = containerHeight;
}
}
UIView *lastDisplayedSectionHeader = displayedSectionHeaders.lastObject;
if (lastDisplayedSectionHeader)
{
// Update the layout of the bottom container of the sticky headers.
// Consider the last visible section header to update the height of the bottom container of the sticky headers.
containerHeight = 0;
CGRect bounds = self.stickyHeadersBottomContainer.frame;
CGFloat maxVisiblePosY = self.recentsTableView.contentOffset.y + (self.recentsTableView.frame.size.height - self.recentsTableView.contentInset.bottom);
for (UIView *header in _stickyHeadersBottomContainer.subviews)
{
if (header.tag == lastDisplayedSectionHeader.tag)
@@ -609,11 +633,10 @@
self.stickyHeadersBottomContainer.bounds = bounds;
}
}
// Handle here the case where no header is currently displayed.
if (!firstDisplayedSectionHeader)
else
{
// No section header is displayed in the table, no more than one section is displayed.
// Handle here the case where no section header is currently displayed in the table.
// No more than one section is then displayed, we retrieve this section by checking the first visible cell.
NSIndexPath *firstCellIndexPath = [self.recentsTableView indexPathForRowAtPoint:CGPointMake(0, self.recentsTableView.contentOffset.y)];
if (firstCellIndexPath)
{
@@ -1103,13 +1126,21 @@
// Update first displayed section position
firstDisplayedSectionHeader = displayedSectionHeaders.firstObject;
firstDisplayedSectionHeaderPosY = firstDisplayedSectionHeader.frame.origin.y;
[self refreshStickyHeadersContainersHeight];
}
else
{
[displayedSectionHeaders removeLastObject];
// This section header is the last displayed one.
// Add a sanity check in case of the header has been already removed.
UIView *lastDisplayedSectionHeader = displayedSectionHeaders.lastObject;
if (section == lastDisplayedSectionHeader.tag)
{
[displayedSectionHeaders removeLastObject];
[self refreshStickyHeadersContainersHeight];
}
}
[self refreshStickyHeadersContainersHeight];
}
}
}