在自定义 UITableViewCell 中控制 UISwitch [英] Controlling UISwitch in a custom UITableViewCell

问题描述

我为单元创建了一个自定义 UITableViewCell 和一个类.然后我将 viewController 中的这个单元格加载到 tableview 中.自定义单元格有一个标签和一个 UiSwitch.我设法让开关按照我的意愿工作，并更改了需要更改的值.

I have created a custom UITableViewCell and a class for the cell. I then load this cell in my viewController into a tableview. The custom cell has a label and a UiSwitch. I have managed to get the switch to work as I want it to and change values that are needed to change.

我现在想要在 UITableView 之外有一个单独的 UISwitch - 当它打开时 - UITableView 中的所有开关都打开.

I now wanted a separate UISwitch outside of the UITableView - that when it is turned on - all the switches in the UITableView are turned on.

由于某种原因，我无法使其正常工作.

For some reason i cannot get this to work.

这是自定义单元格的代码:

This is the code for the custom cell:

- (void)selectAllSwitches:(BOOL)selected 
{
    if (selected){
        [self.selectSwitch setOn:YES animated:YES];
    }else{
        [self.selectSwitch setOn:NO animated:YES];
    }

}
-(void)setMaillist:(BBMailList *)aMaillist
{
    maillist = aMaillist;

    if (maillist){
        self.nameLabel.text = maillist.name;

        if (self.maillist.isSubscribed){
            self.selectSwitch.on = YES;
        }else{
            self.selectSwitch.on = NO;
        }
    }
}

- (IBAction)switchControl:(UISwitch *)sender
{
    self.maillist.isSubscribed = !self.maillist.isSubscribed;

    NSLog (@"IsSubScribed: %ul", self.maillist.isSubscribed);

    if (self.maillist.isSubscribed){
        self.selectSwitch.on = YES;
    }else{
        self.selectSwitch.on = NO;
    }
}

然后在 cellForRowAtIndexPath 中:

Then in cellForRowAtIndexPath:

static NSString *mailListTableViewCellIdentifier = @"BBMailListTableViewCell";

if (tableView == self.maillistTableview ){

    BBMailListTableViewCell * maillistTableviewCell = [self.maillistTableview dequeueReusableCellWithIdentifier:mailListTableViewCellIdentifier];
    if (!maillistTableviewCell){
        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:mailListTableViewCellIdentifier owner:self options:nil];
        maillistTableviewCell = nib[0];
    }


    if ([self.mailLists count ] > 0){
        NSMutableArray *newArray = [NSMutableArray arrayWithArray:self.mailLists];
        [newArray removeLastObject];
        [newArray removeLastObject];
        [self.maillistTableview setContentSize:CGSizeMake(320, 400)];

        BBMailList *maillist = newArray[indexPath.row];

        maillistTableviewCell.maillist = maillist;
    }

    return maillistTableviewCell;
}

此代码按我的需要工作.

This code works as I need it to.

然后我在我的 viewController 中为 tableView 之外的 UISwitch 创建了一个 IBAction 方法

I then created an IBAction methon in my viewController for the UISwitch that is outside of the tableView

- (IBAction)selectAllSwitch:(UISwitch *)sender
{
    BBMailListTableViewCell *switchButton = [[BBMailListTableViewCell alloc]init];
    [switchButton selectAllSwitches:YES];
}

这在我的 UITableViewCell 类中运行了正确的方法 - 但 UITableView 不反映更改.我添加了 [self.myTableView reloadData]; - 但这并没有解决问题.有人能为我阐明一些不是他的光吗?

This runs the correct method in my UITableViewCell class - but the UITableView doesn't reflect the changes. I added [self.myTableView reloadData]; - but this did not solve the issue. Can anyone shed some light not his for me?

****更新****

更新了 UITableView 之外的 UISwitch 代码

Updated Code for the UISwitch outside of the UITableView

- (IBAction)selectAllSwitch:(UISwitch *)sender
{

    BBMailList *tempMailList = [[BBMailList alloc]init];

    tempMailList.isSubscribed = YES; 

    [self.maillistTableViewCell setMaillist:tempMailList];

    [self.maillistTableViewCell selectAllSwitches:YES];


    [self.maillistTableview reloadData];


}

每个 mailistItem 都是我用来存储数据的 NSObject.上面的代码运行了正确的方法 - 但似乎我没有保持状态，当 [self.mayTableView reloadData];运行 - 它将 tableview 数据重置为原始状态?

Each mailistItem is a NSObject I use to store data with. The above code runs the correct methods - but it seems I am not keeping the state maybe and when [self.mayTableView reloadData]; runs - it resets the tableview data to original state?

推荐答案

解决问题的逻辑是:

1) 从您的代码看来，开/关功能取决于您的 maillist.isSubscribed 属性.在视图控制器的 IBAction 中，将其设置为 true.

1) From your code it looks that the on/off functionality is dependent on your maillist.isSubscribed property. In your IBAction of viewcontroller, set it to true.

2) 在此 IBAction 中调用 [self.myTableView reloadData];.因此，一旦表格加载单元格，数组元素将帮助开关设置为 ON/OFF.

2) Call [self.myTableView reloadData]; in this IBAction. So once the table loads cell the array's element will help the switch set to ON/OFF.

希望有帮助！

编辑

您好像迷失了方向.因为在 viewController 的 IBAction 中，您正在创建一个 BBMailList 类型的新数组.试试这个:

It seems like you are losing your track. Because in your IBAction of your viewController you are creating a new array of type BBMailList. Try like this:

假设您的 self.mailLists 是 BBMailList 类型的集合.

Assuming your self.mailLists is a collection of BBMailList type.

现在:

- (IBAction)selectAllSwitch:(UISwitch *)sender
{
    // loop through each array element set it to true.
    for (BBMailList *tempMailList in self.mailLists)
    {
        tempMailList.isSubscribed = Yes;
    }

    // reload table data so once table
    [self.maillistTableview reloadData];
}

并在 cellForRowAtIndexPath 中更改您的邮件列表设置，如下所示:

and in cellForRowAtIndexPath change your setting up of mail list like this:

if ([self.mailLists count ] > 0){
    NSMutableArray *newArray = [NSMutableArray arrayWithArray:self.mailLists];
    [newArray removeLastObject];
    [newArray removeLastObject];
    [self.maillistTableview setContentSize:CGSizeMake(320, 400)];

    BBMailList *maillist = newArray[indexPath.row];

    [maillistTableviewCell setMaillist: maillist]; // <--- Changed this line
}

这篇关于在自定义 UITableViewCell 中控制 UISwitch的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！