ios - UISeachBar 和委托(delegate)方法

Question

我正在尝试在填充有 NSMutableArray 的 UITableView 上完成搜索栏。问题是搜索栏委托(delegate)方法显然不起作用。当我在搜索栏中输入内容时，我没有得到任何答案，甚至 NSLog(@"test") 也没有触发，这让我抓狂。如果我能得到任何帮助，请。 (菜鸟 ObjC 水平在这里 ^^)

这是我的代码(减去所有解析 xml 的部分):(.h)

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>

@interface MetamorphViewController : UITableViewController <UISearchBarDelegate, UISearchDisplayDelegate>{

    IBOutlet UITableView * newsTable;

    UISearchBar *searchBar;

    UISearchDisplayController *searchDisplayController;

    UIActivityIndicatorView * activityIndicator;

    CGSize cellSize;

    NSXMLParser * rssParser;

    NSMutableArray * stories;

    NSArray * newStories;

    NSMutableArray *filteredStories;

    NSString *dataType;

    NSString *idName;

    BOOL *uploaded;

    BOOL isFiltered;

    NSMutableDictionary * item;

    NSString * currentElement;
    NSMutableString * currentTitle, * currentDate, * currentSummary, * currentLink, * currentModule, *currentOwner, *currentOwnername;

}
- (void)parseXMLFileAtURL:(NSString *)URL typeOfModule:(NSString *)typeOfData;
@end 

(.m)

- (void)viewDidLoad {
    self.navigationItem.rightBarButtonItem = self.editButtonItem;

    searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0,70,320,44)];
    [searchBar setShowsScopeBar:YES];
    [searchBar setScopeButtonTitles:[[NSArray alloc] initWithObjects:@"OBJ",@"C", nil]];

    searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self];
    searchDisplayController.delegate = self;
    searchDisplayController.searchResultsDataSource = self;
    [searchDisplayController setSearchResultsDelegate:self];
    self.tableView.tableHeaderView = searchBar;
    [self.tableView reloadData];
    self.tableView.scrollEnabled = YES;

}


-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{
    NSLog(@"test");
    //NSPredicate *filterPredicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@", searchBar];
     //newStories = [stories filteredArrayUsingPredicate:filterPredicate];
    //NSLog(@"newStories %@", newStories);
}

Answer 1

您还没有为 searchBar 对象设置委托(delegate)。在那行之后:

[searchBar setShowsScopeBar:YES];

添加:

searchBar.delegate = self;

不要忘记添加 <UISearchBarDelegate>协议(protocol)。