ios - IOS8.0 UISearchController使用方法

Question

UISearchDisplayController 在 IOS8.0 中被弃用

现在想用UISearchController实现一个位置搜索APP

我想在用户在搜索栏中输入一些词后实现搜索建议列表。

到目前为止我已经完成了服务器的建议结果，但我不知道如何显示它。

该应用程序每次在

中获得搜索建议结果

-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText

然后我将结果存储到 ResultArray。但是如何在屏幕上显示结果呢？我给searchResultsController.view属性赋值tableview后，结果列表还是显示不出来

非常感谢

Answer 1

@property (strong, nonatomic) UISearchController *searchController;

现在我们可以在 viewDidLoad 方法中创建和设置搜索 Controller 。

self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.dimsBackgroundDuringPresentation = NO;
self.searchController.searchBar.scopeButtonTitles = @[NSLocalizedString(@"ScopeButtonCountry",@"Country"),
                                                      NSLocalizedString(@"ScopeButtonCapital",@"Capital")];
self.searchController.searchBar.delegate = self;

接下来我们将搜索栏 View 添加到 TableView 标题中:

self.tableView.tableHeaderView = self.searchController.searchBar;

[self.searchController.searchBar sizeToFit];

UISearchResultsUpdating 委托(delegate)

配置搜索 Controller 后，剩下的大部分是样板代码。我们需要实现 UISearchResultsUpdating 委托(delegate)，以便在搜索文本发生变化时生成新的过滤结果:

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
{
  NSString *searchString = searchController.searchBar.text;
  [self searchForText:searchString scope:searchController.searchBar.selectedScopeButtonIndex];
  [self.tableView reloadData];
}

UISearchBarDelegate - 范围栏

- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope
{
  [self updateSearchResultsForSearchController:self.searchController];
}

还有你手杖.. Learn From here

另一种方式我已经添加了Another Solution，看看可能对你有用。

首先将 UISearchDisplayController 添加到您的 TableView ，然后设置其委托(delegate)。实现以下方法。

Demo Project

In your .h File

    @interface ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource> {

    NSMutableArray *contentList;
    NSMutableArray *filteredContentList;
    BOOL isSearching;
}
@property (strong, nonatomic) IBOutlet UITableView *tblContentList;
@property (strong, nonatomic) IBOutlet UISearchBar *searchBar;
@property (strong, nonatomic) IBOutlet UISearchDisplayController *searchBarController;
In your .m File

Filling the sample data (Optional Only For Demo Purpose)

- (void)viewDidLoad {
    [super viewDidLoad];
    contentList = [[NSMutableArray alloc] initWithObjects:@"iPhone", @"iPod", @"iPod touch", @"iMac", @"Mac Pro", @"iBook",@"MacBook", @"MacBook Pro", @"PowerBook", nil];
    filteredContentList = [[NSMutableArray alloc] init];
}
Now implement the Table View Delegate and Datasource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in the section.
    if (isSearching) {
        return [filteredContentList count];
    }
    else {
        return [contentList count];
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    // Configure the cell...
    if (isSearching) {
        cell.textLabel.text = [filteredContentList objectAtIndex:indexPath.row];
    }
    else {
        cell.textLabel.text = [contentList objectAtIndex:indexPath.row];
    }
    return cell;

}
Search Function Responsible For Searching

- (void)searchTableList {
    NSString *searchString = searchBar.text;

    for (NSString *tempStr in contentList) {
        NSComparisonResult result = [tempStr compare:searchString options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch) range:NSMakeRange(0, [searchString length])];
        if (result == NSOrderedSame) {
            [filteredContentList addObject:tempStr];
        }
    }
}
Search Bar Implementation

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
    isSearching = YES;
}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
    NSLog(@"Text change - %d",isSearching);

    //Remove all objects first.
    [filteredContentList removeAllObjects];

    if([searchText length] != 0) {
        isSearching = YES;
        [self searchTableList];
    }
    else {
        isSearching = NO;
    }
    // [self.tblContentList reloadData];
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
    NSLog(@"Cancel clicked");
}

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
    NSLog(@"Search Clicked");
    [self searchTableList];
}