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我正在发布我尝试过的代码。我正在获取字符串值,然后我将它添加到一个数组并获取数组值。但是当我尝试在其他方法中使用数组值时,它的值是空白的。

//ViewController.h
@interface ViewController : UIViewController{
     NSString *stringValueVideoiD;
     NSMutableArray *TableVideoIDArray;
}

//ViewController.m
@implementation ViewController

- (void)viewDidLoad
{
   TableVideoIDArray=[[NSMutableArray alloc]init];
    [self getAllRows];
}

-(void) getAllRows{

 if(sqlite3_open([databasePath UTF8String], &db) == SQLITE_OK)
    {
       NSString *sqlStatement = [NSString stringWithFormat:@"SELECT * FROM table"];

        sqlite3_stmt *compiledStatement;

        if(sqlite3_prepare_v2(db,[sqlStatement UTF8String] , -1, &compiledStatement, NULL)== SQLITE_OK)
        {
         while(sqlite3_step(compiledStatement)==SQLITE_ROW)
            {
             char *videoId = (char *) sqlite3_column_text(compiledStatement, 1);
                stringValueVideoiD = [[NSString alloc] initWithUTF8String:videoId];
                [TableVideoIDArray addObject:stringValueVideoiD];
                NSLog(@"vids array:%@",TableVideoIDArray);
           //vids aray:value is printed
}
}
}
}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [array count];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *simpleTableIdentifier = @"CustomCell";
    CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell==nil) {

        cell=[[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];

    }

   NSLog(@"here:%@",TableVideoIDArray);
//here comes the problem.My console result is
2013-09-18

11:18:24.431 TubeAlert[468:11303] here:( ) //so guys I need your help why this is happenning or I am making mistakes in my code.
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1 回答 1

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在方法中使用TableVideoIDArray而不是arraynumberOfRowsInSection

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [TableVideoIDArray count];
}

并在之后重新加载 tableview [self getAllRows];

于 2013-09-18T13:44:34.827 回答