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删除UITableView中的多个(尚未加载)行

uitableview iphone

Tejaswi Yerukalapudi · 技术社区 · 14 年前

我在尝试从UITableview中删除尚未加载(或不可见)的行时遇到了一些问题。

我的设置如下-

给你举个例子(数据与我想做的并不相关,但我相信这将是一个不需要太多解释的例子)

宝马
默克

328i号
335i号
接收
勒克斯
德克萨斯州
C550型

我的内部模型是这样的-

NSMutableArray Cars[]
NSMutableArray Models[]

cars[0] = "BMW"
cars[1] = "Acura"
cars[2] = "Merc"

模型[]中的每个元素都是一个向量,其内容如下所示

Models = [ ["328i", "335i"], ["RX", "LX", "TX"], ["C300", "C550"] ];

所以对于我尝试构建的功能。如果用户点击删除并试图删除宝马,应用程序需要删除宝马的条目从第1节和328i和335i的条目在第二节。但是,用户可以独立地删除第二节的任何一行。

2 回复 | 直到 9 年前

Reena 14 年前

nsmutablerarray*Cars=[[nsmutablerarray alloc]initWithObjects:@“BMW”、@“Acura”、@“Merc”、nil];

NSMutableArray *Arr1 = [[NSMutableArray alloc]initWithObjects:@"328i", @"335i",nil];
NSMutableArray *Arr2 = [[NSMutableArray alloc]initWithObjects:@"RX", @"LX", @"TX",nil];
NSMutableArray *Arr3 = [[NSMutableArray alloc]initWithObjects:@"C300", @"C550",nil];

NSMutableArray * Models = [[NSMutableArray alloc] initWithObjects:Arr1,Arr2,Arr3,nil];

如果删除BMW,则从Models数组中删除第一个元素,从Cars数组和reload表中删除第一个元素。即

[Cars removeObjectAtIndex:0];
[Models removeObjectAtIndex:0];
[tableview reload];     //tableview - object of UiTableView

Tejaswi Yerukalapudi 14 年前

- (void)tableView:(UITableView *)tableView 
            commitEditingStyle:(UITableViewCellEditingStyle)editingStyle 
            forRowAtIndexPath:(NSIndexPath *)indexPath {
int row = indexPath.row;


if(indexPath.section ==0) {
    // Need to remove both the Car and the Models associated with it.
    // Begin updates. Doesn't commit edits till endUpdates;
    [tableView beginUpdates];

    // Get the indexPaths to be removed.
    // Cars is straight forward.
    NSMutableArray *carsIndexPath = [[NSMutableArray alloc] init];
    NSIndexPath *carsIndexPathObj = [NSIndexPath indexPathForRow:indexPath.row inSection:0];
    [carsIndexPath addObject:carsIndexPathObj];

    // Manually make index paths for models associated with the car.
    NSMutableArray *modelIndexPaths = [self getIndexPaths:indexPath.row];

    // Now remove from model
    [models removeObjectAtIndex:indexPath.row];
    [cars removeObjectAtIndex:indexPath.row];

    // Remove from Table
    [tableView deleteRowsAtIndexPaths:carsIndexPaths withRowAnimation:UITableViewRowAnimationLeft];
    [tableView deleteRowsAtIndexPaths:modelIndexPaths withRowAnimation:UITableViewRowAnimationLeft];

    // Commit updates
    [tableView endUpdates];

    // Reload data.
    [tableView reloadData];

}
}

-(NSMutableArray *) getIndexPaths:(NSInteger) index {   
    NSMutableArray *indexPathArray = [[NSMutableArray alloc] init];
    int offset = 0;
    for (int i=0; i<index; i++) {
        NSMutableArray *tempArr = [models objectAtIndex:i];
        offset += [tempArr count];
    }
    NSMutableArray *currentModels = [models objectAtIndex:index];
    for (int i=0; i<[currentModels count]; i++) {
        NSIndexPath *indexPathTemp = [NSIndexPath indexPathForRow:offset+i inSection:1];
        [indexPathArray addObject:indexPathTemp];
    }   
    return indexPathArray;
}