iphone - 如何从通讯录中检索 10-10 个联系人

Question

我想实现一次从通讯录中获取或加载 10 个联系人。任何可能从通讯录中检索所有联系人，但一次显示 10-10 个联系人。我正在检索所有 iphone 的图像、名字、姓氏联系人。我想实现这个以电子邮件检索电子邮件联系人，也像 10-10 个电子邮件联系人。 这是我的示例代码：

SData *imageData = (NSData *)CFBridgingRelease(ABPersonCopyImageDataWithFormat(ref, kABPersonImageFormatThumbnail)) ;

            CFStringRef firstName1, lastName1;


            firstName1 = ABRecordCopyValue(ref, kABPersonFirstNameProperty);
            lastName1  = ABRecordCopyValue(ref, kABPersonLastNameProperty);
            NSString *name=[[NSString alloc]init];


            if ([[NSString stringWithFormat:@"%@",firstName1] isEqualToString:@"(null)"] && [[NSString stringWithFormat:@"%@",lastName1] isEqualToString:@"(null)"])
            {

                name = @"No Name";
            }
            else if([[NSString stringWithFormat:@"%@",firstName1] isEqualToString:@"(null)"] && ![[NSString stringWithFormat:@"%@",lastName1] isEqualToString:@"(null)"])
            {

                name = [NSString stringWithFormat:@"%@",lastName1];
            }

           else
           {
                name = [NSString stringWithFormat:@"%@",firstName1];

           }

           name= [ name  capitalizedString];

            EmailandCotactsModel *emailmodel=[[EmailandCotactsModel alloc]init];
            emailmodel.emailemailstring=(__bridge NSString *)(contno);
            emailmodel.emailusernamestring=name;


            if(!imageData)
            {
                NSString *path = [[NSBundle mainBundle] pathForResource:@"NoImage" ofType:@"png"];
                NSData *photoData = [NSData dataWithContentsOfFile:path];
                emailmodel.emailimagesData=photoData;
            }
            else
            {
                emailmodel.emailimagesData=imageData;

            }


            [emailarray addObject:emailmodel];

            callsmsDataBool=NO;

            NSLog(@"table email count %d and i %d",emailarray.count,tablecountint);
            if(emailarray.count==tablecountint)
            {

                NSLog(@"table email reload");

                tablecountint=tablecountint+10;

                dispatch_async( dispatch_get_global_queue(0,0),^{
                    [self reloadtable];
                });

                NSLog(@"perform selection in bg");

            }

        }
    }


    [self.tableview reloadData];


   if(!emailarray.count && [socialstring isEqualToString:@"Email"])
   {
       selectedlabel.text=@"Emails not found";
   }
   else if(emailarray.count && [socialstring isEqualToString:@"Email"])
   {
      // selectedlabel.text=@"Email";

       selectedlabel.text=[NSString stringWithFormat:@"%ld",nPeople];
   }
   else if(!emailarray.count && [socialstring isEqualToString:@"SMS"])
   {
       selectedlabel.text=@"Phone no's not found";
   }
   else if(emailarray.count && [socialstring isEqualToString:@"SMS"])
   {
       selectedlabel.text=@"SMS";
   }
   else
   {
        selectedlabel.text=@"";
   }

    [tableview reloadData];

任何有价值的建议将不胜感激......

提前致谢。

Answer 1

在一个数组中获取所有联系人后，将十个联系人复制到另一个数组并使用该新数组校准表重新加载方法，方法是最初调用此方法 lowerlimit = 0 和 upperlimit=10;

-(void)tabledataloadingmethod
{
    for (lowerlimit=0+lowerlimit; lowerlimit<upperlimit; lowerlimit++)
    {
        if (lowerlimit<[self.array1 count])
        {
            OBJECT *obj=[self.array1 objectAtIndex:lowerlimit];
            [self.array2 addObject:obj];

        }

    }
    [self.tbleview reloadData];

}  

在 table delagete 方法 cellforrowatindex 中使用这个

    if ([self.array2 count]==indexPath.row)
            {


                UITableViewCell *cell1=[self.tbleview dequeueReusableCellWithIdentifier:@"cells"];
                if(cell1==nil)
                {
                    cell1=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"Cells"];
                }

                cell1.textLabel.textColor = [UIColor whiteColor];
                cell1.textLabel.text=@"Loading more...";

                [self performSelector:@selector(loadmorecells) withObject:nil afterDelay:0.2];



                return cell1;
  }    
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

    if ([self.array2 count]>0 && ([self.array2 count]<[self.array1 count]))
    {
        return [self.array2 count]+1;
    }
    else
    {
        return [self.array2 count];
    }
} 

这里我们在 loadmorecells 方法中增加下限和上限

-(void)loadmorecells
    {

        lowerlimit = upperlimit;

        upperlimit = upperlimit +10;
        [self tabledataloadingmethod];
    }