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add a search bar for filtering posts

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Sami Samhuri 2015-05-16 09:08:56 -07:00
parent fb8d71536b
commit e8e67650fd
2 changed files with 84 additions and 19 deletions
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6
Blog/Base.lproj/Main.storyboard
View file

@ -371,14 +371,16 @@ wanted with as little input and thought as possible.</string>
<scene sceneID="smW-Zh-WAh">
<objects>
<tableViewController storyboardIdentifier="Posts View Controller" title="Posts" useStoryboardIdentifierAsRestorationIdentifier="YES" id="7bK-jq-Zjz" customClass="PostsViewController" sceneMemberID="viewController">
<tableView key="view" clipsSubviews="YES" contentMode="scaleToFill" restorationIdentifier="Posts Table View" alwaysBounceVertical="YES" indicatorStyle="white" dataMode="prototypes" style="grouped" separatorStyle="singleLineEtched" rowHeight="44" sectionHeaderHeight="10" sectionFooterHeight="10" id="r7i-6Z-zg0">
<tableView key="view" clipsSubviews="YES" contentMode="scaleToFill" restorationIdentifier="Posts Table View" alwaysBounceVertical="YES" indicatorStyle="white" keyboardDismissMode="interactive" dataMode="prototypes" style="grouped" separatorStyle="singleLineEtched" rowHeight="44" sectionHeaderHeight="10" sectionFooterHeight="10" id="r7i-6Z-zg0">
<rect key="frame" x="0.0" y="0.0" width="600" height="536"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" red="0.66666666669999997" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<color key="tintColor" red="0.7953414352" green="0.0" blue="0.013255690590000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<searchBar key="tableHeaderView" contentMode="redraw" searchBarStyle="minimal" placeholder="Search" id="QTr-jX-TNh">
<searchBar key="tableHeaderView" contentMode="redraw" barStyle="black" searchBarStyle="minimal" placeholder="Search" showsCancelButton="YES" id="QTr-jX-TNh">
<rect key="frame" x="0.0" y="0.0" width="600" height="44"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMaxY="YES"/>
<color key="tintColor" red="0.96862745100000003" green="0.96862745100000003" blue="0.96862745100000003" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<color key="barTintColor" red="0.96862745100000003" green="0.96862745100000003" blue="0.96862745100000003" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<textInputTraits key="textInputTraits" returnKeyType="search" enablesReturnKeyAutomatically="YES"/>
<connections>
<outlet property="delegate" destination="7bK-jq-Zjz" id="1Ht-4q-Rno"/>

97
Blog/PostsViewController.m
View file

@ -26,6 +26,7 @@
@interface PostsViewController () <UISearchBarDelegate>
@property (nonatomic, strong) NSArray *filteredPostCollections;
@property (nonatomic, strong) NSArray *postCollections;
@property (nonatomic, readonly, strong) NSMutableArray *drafts;
@property (nonatomic, readonly, strong) NSMutableArray *publishedPosts;
@ -40,6 +41,7 @@
@property (nonatomic, weak) NSLayoutConstraint *titleViewWidthConstraint;
@property (nonatomic, weak) NSLayoutConstraint *titleViewHeightConstraint;
@property (nonatomic, weak) NSLayoutConstraint *titleLabelTopConstraint;
@property(nonatomic, assign) BOOL hasAppeared;
@end
@ -202,11 +204,21 @@ static const NSUInteger SectionPublished = 1;
if (self.tableView.indexPathForSelectedRow) {
[self.tableView deselectRowAtIndexPath:self.tableView.indexPathForSelectedRow animated:YES];
}
[self setupKeyboardNotifications];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
if (!self.hasAppeared) {
self.hasAppeared = YES;
[self hideSearchBarAnimated:YES];
}
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self teardownBlogStatusTimer];
[self teardownKeyboardNotifications];
}
- (void)viewDidLayoutSubviews {
@ -257,7 +269,7 @@ static const NSUInteger SectionPublished = 1;
}
- (PostCollection *)postCollectionForSection:(NSInteger)section {
return self.postCollections[section];
return [self collectionsForTableView][section];
}
- (Post *)postForIndexPath:(NSIndexPath *)indexPath {
@ -265,11 +277,13 @@ static const NSUInteger SectionPublished = 1;
}
- (NSMutableArray *)drafts {
return [self postCollectionForSection:SectionDrafts].posts;
PostCollection *collection = self.postCollections[SectionDrafts];
return collection.posts;
}
- (NSMutableArray *)publishedPosts {
return [self postCollectionForSection:SectionPublished].posts;
PostCollection *collection = self.postCollections[SectionPublished];
return collection.posts;
}
- (IBAction)insertNewObject:(id)sender {
@ -334,6 +348,34 @@ static const NSUInteger SectionPublished = 1;
[self presentViewController:alertController animated:YES completion:nil];
}
#pragma mark - Keyboard notifications
- (void)setupKeyboardNotifications {
NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
[notificationCenter addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[notificationCenter addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)teardownKeyboardNotifications {
NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
[notificationCenter removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[notificationCenter removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyboardWillShow:(NSNotification *)note {
NSValue *keyboardFrame = note.userInfo[UIKeyboardFrameEndUserInfoKey];
CGFloat keyboardHeight = keyboardFrame.CGRectValue.size.height;
UIEdgeInsets inset = self.tableView.contentInset;
inset.bottom = keyboardHeight;
self.tableView.contentInset = inset;
}
- (void)keyboardWillHide:(NSNotification *)note {
UIEdgeInsets inset = self.tableView.contentInset;
inset.bottom = 0;
self.tableView.contentInset = inset;
}
#pragma mark - Blog notificitons
- (void)setupBlogNotifications {
@ -355,7 +397,7 @@ static const NSUInteger SectionPublished = 1;
}
- (void)addPost:(Post *)post toSection:(NSUInteger)section {
PostCollection *collection = [self postCollectionForSection:section];
PostCollection *collection = self.postCollections[section];
NSInteger row = 0;
[collection.posts insertObject:post atIndex:row];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:section];
@ -468,8 +510,12 @@ static NSString *const StateRestorationBlogStatusTextKey = @"blogStatusText";
#pragma mark - Table View
- (NSArray *)collectionsForTableView {
return self.filteredPostCollections ?: self.postCollections;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return self.postCollections.count;
return [self collectionsForTableView].count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
@ -525,28 +571,45 @@ static NSString *const StateRestorationBlogStatusTextKey = @"blogStatusText";
#pragma mark - UISearchBarDelegate methods
- (void)hideSearchBarAnimated:(BOOL)animated {
[self.tableView setContentOffset:CGPointMake(0, CGRectGetHeight(self.searchBar.bounds)) animated:animated];
}
- (void)filterPosts:(NSString *)text {
NSMutableArray *collections = nil;
if (text.length) {
}
else {
collections = [NSMutableArray new];
for (PostCollection *collection in self.postCollections) {
PostCollection *filteredCollection = [[PostCollection alloc] initWithTitle:collection.title posts:@[]];
for (Post *post in collection.posts) {
BOOL titleMatches = [post.title rangeOfString:text options:NSCaseInsensitiveSearch].location != NSNotFound;
BOOL bodyMatches = [post.body rangeOfString:text options:NSCaseInsensitiveSearch].location != NSNotFound;
if (titleMatches || bodyMatches) {
[filteredCollection.posts addObject:post];
}
}
if (filteredCollection.posts.count) {
[collections addObject:filteredCollection];
}
}
}
self.filteredPostCollections = collections;
[self.tableView reloadData];
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
// [self filterPosts:searchText];
[self filterPosts:searchText];
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
[self filterPosts:self.searchBar.text];
[self.searchBar resignFirstResponder];
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
// [self filterPosts:nil];
[self filterPosts:nil];
[self hideSearchBarAnimated:YES];
[self.searchBar resignFirstResponder];
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
// [self filterPosts:self.searchBar.text];
}
@end