iphone - 关于 UITableView

Question

我是 iPhone 编程的初学者...我有一个类似于照片库的应用程序，我在其中使用带有 JSON 的服务器为 UITableView 中的每个单元格加载图像和标题。当我滚动表格时，程序崩溃了!

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

}

-(CGFloat) tableView : (UITableView *) tableView heightForRowAtIndexPath: (NSIndexPath *) indexPath {
    return 80;
}

//
// tableView:cellForRowAtIndexPath:
//
// Returns the cell for a given indexPath.
//
- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];


    }

    NSString *tmp3=[NSString stringWithFormat:@"%@",[path_arr objectAtIndex:indexPath.row]];
    tmp3=[tmp3 stringByReplacingOccurrencesOfString:@"(" withString:@""];
    tmp3=[tmp3 stringByReplacingOccurrencesOfString:@")" withString:@""];
    tmp3=[tmp3 stringByReplacingOccurrencesOfString:@" " withString:@""];
    tmp3=[tmp3 stringByReplacingOccurrencesOfString:@"\n" withString:@""];
    NSLog(@"URL:%@",tmp3);


    NSData *imageData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:tmp3]];

    //NSLog(@"Image DATA:%@",[path_arr objectAtIndex:0]);
    UIImage* image1 = [[UIImage alloc] initWithData:imageData];
    UIImageView *imgview=[[UIImageView alloc]initWithImage:image1];
    imgview.frame=CGRectMake(5, 5, 56, 68);
    imgview.backgroundColor=[UIColor redColor];
    [cell.contentView addSubview:imgview];


    UILabel *lbl_desc=[[UILabel alloc]initWithFrame:CGRectMake(70, 1, 240, 50)];
    NSString *tmp=[NSString stringWithFormat:@"%@",[descrip_arr objectAtIndex:indexPath.row]];
    tmp=[tmp stringByReplacingOccurrencesOfString:@"(" withString:@""];
    tmp=[tmp stringByReplacingOccurrencesOfString:@")" withString:@""];
    tmp=[tmp stringByReplacingOccurrencesOfString:@"\n" withString:@""];
    //tmp=[tmp stringByReplacingOccurrencesOfString:@" " withString:@""];
    lbl_desc.text=tmp;
    lbl_desc.font=[UIFont systemFontOfSize:14];
    lbl_desc.lineBreakMode=UILineBreakModeWordWrap;
    lbl_desc.numberOfLines=0;
    lbl_desc.textAlignment=UITextAlignmentLeft;
    lbl_desc.backgroundColor=[UIColor clearColor];
    [cell.contentView addSubview:lbl_desc];


    NSLog(@"A_count:%@",[count_arr objectAtIndex:0]);
    UILabel *lbl_page=[[UILabel alloc]initWithFrame:CGRectMake(230, 50, 100, 20)];
    NSString *tmp1=[NSString stringWithFormat:@"%@",[count_arr objectAtIndex:indexPath.row]];
    NSLog(@"A_count1:%@",tmp1);
    tmp1=[tmp1 stringByReplacingOccurrencesOfString:@"(" withString:@""];
    tmp1=[tmp1 stringByReplacingOccurrencesOfString:@")" withString:@""];
    tmp1=[tmp1 stringByReplacingOccurrencesOfString:@"\n" withString:@""];
    tmp1=[tmp1 stringByAppendingString:@"  Images"];
    NSLog(@"A_count123:%@",tmp1);
    lbl_page.text=tmp1;
    lbl_page.font=[UIFont systemFontOfSize:12];
    lbl_page.lineBreakMode=UILineBreakModeWordWrap;
    lbl_page.numberOfLines=0;
    lbl_page.textAlignment=UITextAlignmentLeft;
    lbl_page.backgroundColor=[UIColor clearColor];
    [cell.contentView addSubview:lbl_page];

    cell.backgroundColor=[UIColor clearColor];

    [imageData release];
    [image1 release];
    [imgview release];
}

Answer 1

您应该在函数末尾return cell;。