如何从Objective c中的UITableView获取UILabel的多个值

Posted 2023-02-27

【中文标题】如何从Objective c中的UITableView获取UILabel的多个值

【英文标题】：How to get multiple value on UILabel from UITableView in Objective c

【发布时间】：2016-11-12 06:21:07

【问题描述】：

我是 ios 新手，我面临着从 UITableView 获取 UILabel 中的多个值的问题。我的代码是这样的

#pragma  mark - Complaints Assigned Connection Method
//Connection Method and Delegate...
-(void)serverconnection


    NSString *soapMessage = [NSString stringWithFormat:@"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
                             "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
                             "<soap:Body>"
                             "<Method xmlns=\"http://tempuri.org/\">"
                             "</Method>"
                             "</soap:Body>"
                             "</soap:Envelope>"];



    NSURL *myNSUObj=[NSURL URLWithString:@"URL"];
    // NSURLRequest *myNSURequestObj=[NSURLRequest requestWithURL:myNSUObj];

    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:myNSUObj];
    NSString *msgLength = [NSString stringWithFormat:@"%lu", (unsigned long)[soapMessage length]];

    [theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [theRequest addValue: @"http://tempuri.org/Method" forHTTPHeaderField:@"SOAPAction"];
    [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];
    [theRequest setHTTPMethod:@"POST"];
    [theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];

    myNSUConnectionassignedObj=[[NSURLConnection alloc]initWithRequest:theRequest delegate:self];
    NSLog(@"Data =%@",myNSUConnectionassignedObj);
    if(myNSUConnectionassignedObj)
    

        NSLog(@"successful connection");
        myNSMDataassignedFromServer=[[NSMutableData alloc]init];
    


- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

        [myNSMDataassignedFromServer setLength:0];


- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data


        [myNSMDataassignedFromServer appendData:data];


- (void)connectionDidFinishLoading:(NSURLConnection *)connection



        NSXMLParser *myNSXMLParserassignedObj=[[NSXMLParser alloc]initWithData:myNSMDataassignedFromServer];
        myNSXMLParserassignedObj.delegate=self;
        [myNSXMLParserassignedObj parse];
        NSLog(@"%@",myNSXMLParserassignedObj.parserError);
        idassignedarray=[[NSMutableArray alloc]init];
        if(myNSUConnectionassignedObj == nil)
        
            assignedtable.hidden=YES;
        

        idassignedarray=[responseassigneddict valueForKey:@"abc"];
        NSLog(@"Result Array =%@",idassignedarray);
        // [myDataNSMArray addObject:idassignedarray];
        shortnameassignedarray=[[NSMutableArray alloc]init];
        shortnameassignedarray=[responseassigneddict valueForKey:@"abcid"];

    [assignedtable reloadData];


#pragma mark - NSXMLParsing Delegate

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict

    if([elementName isEqualToString:@"FillBlocksNew"])
    
        myDataClassObj=[[mydata alloc]init];
    


-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string


    myMutableStringassignedObj=[[NSMutableString alloc]initWithString:string];
    NSLog(@"Array String: %@",myMutableStringassignedObj);
    NSData *data = [myMutableStringassignedObj dataUsingEncoding:NSUTF8StringEncoding];
    responseassigneddict = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
    NSLog(@"JSON DATA = %@",responseassigneddict);


-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName

    NSLog(@"DataArray: %@",myDataNSMArray);




#pragma mark - TableView Delegate

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

        return [idassignedarray count];




- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath


        static NSString *STI=@"STI";
        AssignTableViewCell *cell = (AssignTableViewCell *)[tableView dequeueReusableHeaderFooterViewWithIdentifier:STI];
        if (cell == nil)
        
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"AssignTableViewCell" owner:self options:nil];
            cell = [nib objectAtIndex:0];
            cell.accessoryType=UITableViewCellAccessoryNone;
        
        cell.newlbl.text=[idassignedarray objectAtIndex:indexPath.row];

        return cell;



- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView


        return 1;


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath


    [[assignedtable cellForRowAtIndexPath:indexPath] setAccessoryType:UITableViewCellAccessoryCheckmark];

    activityid.text=[NSString stringWithFormat:@"%@",[shortnameassignedarray objectAtIndex:indexPath.row]];

它的输出是这样的

在 UILabel 我只得到一个值。第一个值被覆盖。如何在 UILabel 中获取多个选定的 id。提前致谢！

我的代码

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath


        static NSString *STI=@"STI";
        AssignTableViewCell *cell = (AssignTableViewCell *)[tableView dequeueReusableHeaderFooterViewWithIdentifier:STI];
        if (cell == nil)
        
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"AssignTableViewCell" owner:self options:nil];
            cell = [nib objectAtIndex:0];
            cell.accessoryType=UITableViewCellAccessoryNone;
        

        cell.newlbl.text = [idassignedarray objectAtIndex:indexPath.row];
        if ([cellSelected containsObject:cell.newlbl.text])
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        
        else
        cell.accessoryType = UITableViewCellAccessoryNone;
        

        return cell;



- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath


    [[assignedtable cellForRowAtIndexPath:indexPath] setAccessoryType:UITableViewCellAccessoryCheckmark];

    activityid.text=[NSString stringWithFormat:@"%@",[shortnameassignedarray objectAtIndex:indexPath.row]];
    activitytxt.text=[idassignedarray objectAtIndex:indexPath.row];



    static NSString *STI=@"STI";
    AssignTableViewCell *cell = (AssignTableViewCell *)[tableView dequeueReusableHeaderFooterViewWithIdentifier:STI];
    if (cell == nil)
    
        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"AssignTableViewCell" owner:self options:nil];
        cell = [nib objectAtIndex:0];
        cell.accessoryType=UITableViewCellAccessoryNone;
    



    if ([cellSelected containsObject:cell.newlbl.text])
        [cellSelected removeObject:cell.newlbl.text];
        NSString *str = [cellSelected componentsJoinedByString: @","];
        NSLog(@"String value is =%@",str);

    
    else
        [cellSelected addObject:cell.newlbl.text];
        NSString *str = [cellSelected componentsJoinedByString: @","];
        NSLog(@"String value is =%@",str);

    

【问题讨论】：

所以您需要创建所选单元格字符串的数组？

当你想在标签上显示选定的值时？有按钮吗？以及如何在标签上显示多个值？我的意思是逗号分隔？还是别的什么？

@Lion 是的，它应该在 UILabel 上用逗号分隔。在 UITableView 的 Didselected 方法中。

您需要选定单元格的逗号分隔值吗？

@vaibhav 是的，我需要。

【参考方案1】：

你的didselectRowAtIndexPath 应该是这样的，

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath



[[assignedtable cellForRowAtIndexPath:indexPath] setAccessoryType:UITableViewCellAccessoryCheckmark];

NSArray *indexPathForSelectedRow = [assignedtable indexPathsForSelectedRows];

 NSString *str = [[NSString alloc]init];

for (int i = 0; i < indexPathForSelectedRow.count; i++) 

     NSIndexPath *iPath = [indexPathForSelectedRow objectAtIndex:i];


    [str stringByAppendingString:[NSString stringWithFormat:@"%@,",[shortnameassignedarray objectAtIndex:iPath.row]]];






if (str.length > 0) 

     str = [str substringToIndex:[str length] - 1];
    activityid.text= str;

并确保为您的tableview 启用多项选择！！

【讨论】：

我在标签上一无所获。当我滚动 UITableView 选择被删除

在 viewDidload 中设置assignedtable.allowsMultipleSelection = YES; 然后试试！

在 str 中显示“对象返回空描述”

确保shortnameassignedarray 有字符串对象并且它不为零，并确保您在indexPathForSelectedRow 数组中获取索引路径！并采取新的更新答案！！！！这是一个小错误！

"indexPathForSelectedRow 的打印说明：<__nsarrayi>( length = 2, path = 0 - 1, length = 2, path = 0 - 3 )" IndexPath 的值

【参考方案2】：

你可以通过两种方式做到这一点。

1) 将所有文本内容附加到一个 larde NSString 中。您可以将其分配给文本标签。通过将行数设置为 0，可以使用大字符串。

2) 另一种方式，可能是您想要的，是更改表格中的单元格。通过更改或创建新的单元格类型。这允许您在一个单元格中添加更多 UILabel（和其他类型）。