ios - 用NSObject替换NSMutableArray并在UITableView中读取它

我试图做到这一点，以便当我在picherWheel上选择船的所有人时，可以在tableView中找到他们的船。目前，我是通过在选择器上输入带有if-else系列的NSMutableArray来实现的，就像这样

-(void)updatePicker
{
NSString *boatsFromOwner = [boatOwners objectAtIndex:[shipOwners selectedRowInComponent:0]];

boatsForOwner = [[NSMutableArray alloc] init];
if ([boatsFromOwner isEqualToString:@"Owner1"]) {
    [self.boatsForOwner addObject:@"Titanic1"];
    [self.boatsForOwner addObject:@"Titanic2"];
    [self.boatsForOwner addObject:@"Titanic3"];
    [self.boatsForOwner addObject:@"Titanic4"];
    [self.boatsForOwner addObject:@"Titanic5"];
    [self.boatsForOwner addObject:@"Titanic6"];
    [self.boatsForOwner addObject:@"Titanic7"];
    }
if ([boatsFromOwner isEqualToString:@"Owner2"]) {
    [self.boatsForOwner addObject:@"Titanic1"];
    [self.boatsForOwner addObject:@"Titanic2"];
    [self.boatsForOwner addObject:@"Titanic3"];


    }

然后将其读取到tableView中，如下所示:

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"SimpleTableCell";

SimpleTableCell *cell = (SimpleTableCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];


cell.nameLabel.text = [boatsForOwner objectAtIndex:indexPath.row];
cell.moreInfoLabel.text = [boatsForOwner objectAtIndex:indexPath.row];

return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;
{
UITableViewCell *cell = [self.boatsTableView cellForRowAtIndexPath:indexPath];

[self performSegueWithIdentifier:@"boatInfoSegue" sender:cell];


[tableView deselectRowAtIndexPath:indexPath animated:YES];

现在，这个工作正常。但是我认为使用NSObjects来存储有关飞船的信息会很明智，因为我需要在多个地方使用它。所以我做了一些船上物体，像这样:

cargoShips* Titanic = [[cargoShips alloc]init];
Titanic.name = @"Titanic1";
Titanic.size = @"1000";
Titanic.owner = @"Owner1";
cargoShips* Titanic2 = [[cargoShips alloc]init];
Titanic2.name = @"Titanic2";
Titanic2.size = @"2000";
Titanic2.owner = @"Owner2";

这样可以正确记录日志，并且效果很好。这是第一个问题:

1)如何将pickerWheel上的对象链接到* .owner，因此，当我在方向盘上选择“Owner1”时，会得到所有标记有*.owner = @"Owner1"的船只？

2)如何用这些船的* .name填充UITableView？

3)并且在表中加载了这些对象后，如何向发送该对象的对象的目标视图发送消息？

提前致谢

最佳答案

它非常简单直接。只需使用您创建的CargoShips类的对象即可。

-(void)updatePicker
{
NSString *boatsFromOwner = [boatOwners objectAtIndex:[shipOwners selectedRowInComponent:0]];

boatsForOwner = [[NSMutableArray alloc] init];
if ([boatsFromOwner isEqualToString:@"Owner1"]) {
  cargoShips* Titanic = [[cargoShips alloc]init];
  Titanic.name = @"Titanic1";
  Titanic.size = @"1000";
  Titanic.owner = @"Owner1";

  [self.boatsForOwner addObject:Titanic];

  Titanic = [[cargoShips alloc]init];
  Titanic.name = @"Titanic2";
  Titanic.size = @"2000";
  Titanic.owner = @"Owner2";

  [self.boatsForOwner addObject:Titanic];

  Titanic = [[cargoShips alloc]init];
  Titanic.name = @"Titanic3";
  Titanic.size = @"3000";
  Titanic.owner = @"Owner3";

  [self.boatsForOwner addObject:Titanic];

}else if ([boatsFromOwner isEqualToString:@"Owner2"]) {
  cargoShips* Titanic = [[cargoShips alloc]init];
  Titanic.name = @"Titanic1";
  Titanic.size = @"1000";
  Titanic.owner = @"Owner1";

  [self.boatsForOwner addObject:Titanic];

  Titanic = [[cargoShips alloc]init];
  Titanic.name = @"Titanic2";
  Titanic.size = @"2000";
  Titanic.owner = @"Owner2";

  [self.boatsForOwner addObject:Titanic];

}

}

在TableView委托函数中，您可以使用以下代码

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"SimpleTableCell";

SimpleTableCell *cell = (SimpleTableCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

cargoShips* Titanic=[boatsForOwner objectAtIndex:indexPath.row];//You can get the object reference like this
cell.nameLabel.text = Titanic.name;
cell.moreInfoLabel.text = Titanic.owner;

return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;
{

cargoShips* Titanic=[boatsForOwner objectAtIndex:indexPath.row]; //Use the Titanic object for further processing..
UITableViewCell *cell = [self.boatsTableView cellForRowAtIndexPath:indexPath];

[self performSegueWithIdentifier:@"boatInfoSegue" sender:cell];


[tableView deselectRowAtIndexPath:indexPath animated:YES];
}

关于ios - 用NSObject替换NSMutableArray并在UITableView中读取它，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/14314919/