不調用UITableView cellForRowAtIndexPath

Question

這是使用UISearchBar和UITableView的表格視圖。調用 numberOfRowsInSection。但沒有調用cellForRowAtIndexPath。 我不明白爲什麼cellForRowAtIndexPath沒有被調用。

RegistMovieViewController.h

#import <UIKit/UIKit.h> 

@interface RegistMovieViewController : UIViewController <UISearchBarDelegate, UITableViewDataSource, UITableViewDelegate> 
{ 
    UITableView *searchResultView; 
    NSMutableArray *searchResult; 
} 

@end 

RegistMovieViewController.m

// 
// RegistMovieViewController.m 
// 

#import "RegistMovieViewController.h" 
#import <TBXML.h> 
#import <TBXML+HTTP.h> 
#import <TBXML+NSDictionary.h> 

@interface RegistMovieViewController() 

@end 

@implementation RegistMovieViewController 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    [self.view setBackgroundColor:[UIColor whiteColor]]; 

    UIBarButtonItem *cancelButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancel)]; 
    self.navigationItem.leftBarButtonItem = cancelButtonItem; 

    UIBarButtonItem *saveButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Save" style:UIBarButtonItemStyleDone target:self action:@selector(save)]; 
    self.navigationItem.rightBarButtonItem = saveButtonItem; 

    CGFloat topOffset = 0; 

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 70000 
    [self.view setTintColor:[UIColor blueColor]]; 

    topOffset = [[UIApplication sharedApplication] statusBarFrame].size.height + self.navigationController.navigationBar.frame.size.height; 
#endif 

    searchResult = [[NSMutableArray alloc] init]; 

    // searchBar 
    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, topOffset, self.view.frame.size.width, 0)]; 
    [searchBar setDelegate:self]; 
    [searchBar sizeToFit]; 
    [self.view addSubview:searchBar]; 

    // tableView 
    CGFloat y = searchBar.frame.origin.y + searchBar.frame.size.height; 
    searchResultView = [[UITableView alloc] initWithFrame:CGRectMake(0, y, self.view.frame.size.width, self.view.frame.size.height - y) style:UITableViewStylePlain]; 
    [searchResultView setDataSource:self]; 
    [searchResultView setDelegate:self]; 
    [self.view addSubview:searchResultView]; 

    [searchBar becomeFirstResponder]; 
} 

- (void)save { 


} 


- (void)cancel { 

    [self dismissViewControllerAnimated:YES completion:nil]; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

#pragma mark - UISearchBar Delegate 

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar 
{ 

    NSString *urlString = [NSString stringWithFormat:@"http://openapi.naver.com/search?key=65d378a85138040e682d458320ef35d9&target=movie&query=%@", [searchBar.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 
    NSURL *url = [NSURL URLWithString:urlString]; 

    NSLog(@"searchBarSearchButtonClicked : %@", urlString); 

    TBXMLSuccessBlock successBlock = ^(TBXML *tbxmlDocument) { 
     TBXMLElement *rootElement = tbxmlDocument.rootXMLElement; 
     TBXMLElement *errorElement = [TBXML childElementNamed:@"error_code" parentElement:rootElement]; 
     if (errorElement != nil) { 
      TBXMLElement *errorMsgElement = [TBXML childElementNamed:@"message" parentElement:rootElement]; 
      NSLog(@"Error[%@]:%@", [TBXML textForElement:errorElement], [TBXML textForElement:errorMsgElement]); 
     } else { 
      TBXMLElement *channelElement = [TBXML childElementNamed:@"channel" parentElement:rootElement]; 
      TBXMLElement *totalElement = [TBXML childElementNamed:@"total" parentElement:channelElement]; 
      NSString *totalCount = [TBXML textForElement:totalElement]; 

      if ([totalCount integerValue] == 0) { 
       NSLog(@"No Data!"); 
      } else { 
       TBXMLElement *itemElement = [TBXML childElementNamed:@"item" parentElement:channelElement]; 
       [searchResult removeAllObjects]; 
       do { 
        //TBXMLElement *titleElement = [TBXML childElementNamed:@"title" parentElement:itemElement]; 
        //NSLog(@"title:%@", [TBXML textForElement:titleElement]); 
        NSDictionary *itemDic = [TBXML dictionaryWithXMLNode:itemElement]; 

        [searchResult addObject:itemDic]; 

       } while ((itemElement = [TBXML nextSiblingNamed:@"item" searchFromElement:itemElement]) != nil); 

       NSLog(@"Reload!"); 
       [searchResultView reloadData]; 
      } 
     } 
    }; 
    TBXMLFailureBlock failureBlock = ^(TBXML *tbxmlDocument, NSError *error) { 
     NSLog(@"Error! %@ %@", [error localizedDescription], [error userInfo]); 
    }; 

    [TBXML tbxmlWithURL:url success:successBlock failure:failureBlock]; 
} 

#pragma mark - UITableView Datasource 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    NSLog(@":: cellForRowAtIndexPath"); 

    static NSString *CellIdentifier = @"MovieCell"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 

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

    cell.textLabel.text = @"TEST"; 
    return cell; 
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{ 
    NSLog(@":: numberOfRowsInSection : %d", [searchResult count]); 
    return [searchResult count]; 
} 

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    NSLog(@":: didSelectRowAtIndexPath"); 
} 

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    return 50; 
} 

@end 

Answer 1

你也必須實現

-tableView:numberOfRowsInSection:

這樣的UITableView可以確定它的調用頻率-tableView:cellForRowAtIndexPath:。