如何在UITableView中添加分页？

Question

我从第一页的API解析数据并将其添加到中UITableView，现在页面可以是多个，比如说100，我也可以从API获取页面总数。但是我将如何在tableView中为每个页面实现它并在滚动时显示指示器。看看我的代码

NSURL *theURL = [NSURL URLWithString:@"http://qa.networc.in:1336/api/dispatcher/rideScheduled/:1"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:theURL      cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:20.0f];

//Specify method of request(Get or Post)
[theRequest setHTTPMethod:@"GET"];

//Pass some default parameter(like content-type etc.)
[theRequest setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[theRequest setValue:@"application/json; charset=UTF-8" forHTTPHeaderField:@"Content-Type"];

[theRequest addValue:token forHTTPHeaderField:@"x-access-token"];
NSURLResponse *theResponse = NULL;
NSError *theError = NULL;

NSData *responseData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&theResponse error:&theError];
if (responseData == nil)
{
    return;
}

NSDictionary *dataDictionaryResponse = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&theError];
NSLog(@"url to send request= %@",theURL);
NSLog(@"%@",dataDictionaryResponse);



NSURLSession *session = [NSURLSession sharedSession];

NSURLSessionDataTask *task = [session dataTaskWithRequest:theRequest
                                        completionHandler:
                              ^(NSData *data, NSURLResponse *response, NSError *error) {

                                  NSLog(@"Response:%@ %@\n", response, error);
                                  if(error == nil)
                                  {

                                      NSString * text = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
                                      NSLog(@"Data = %@",text);
                                  }

                                  dictionary = [[NSJSONSerialization JSONObjectWithData:data options:0 error:nil]objectForKey:@"data"];

                                  NSArray *total =  [dictionary objectForKey:@"total"];
                                  NSLog(@"latlop %@", total);




                                  NSArray *IDArray = [dictionary objectForKey:@"docs"];
                                  for (NSDictionary *Dict in IDArray)
                                  {

                                      NSMutableDictionary *temp = [NSMutableDictionary new];
                                      [temp setObject:[Dict objectForKey:@"_id"] forKey:@"_id"];

                                      NSLog(@"temp %@", temp );

                                      NSString *booknumber = [Dict objectForKey:@"bookingNumber"];
                                      if([booknumber length] != 0)
                                          [temp setObject:booknumber forKey:@"bookingNumber"];

                                      NSMutableDictionary *stp1 = [Dict objectForKey:@"stop1"];

                                      if ([[stp1 allKeys] containsObject:@"address"]) {

                                          [temp setObject:[stp1 objectForKey:@"address"] forKey:@"address"];




                                          ];

                                      }

                                      NSMutableDictionary *stp2 = [Dict objectForKey:@"stop2"];

                                      if ([[stp2 allKeys] containsObject:@"address"]) {

                                          [temp setObject:[stp2 objectForKey:@"address"] forKey:@"address1"];


                                          NSArray *latlongstp2 =  [stp2 objectForKey:@"location"];
                                          [temp setObject:[latlongstp2 objectAtIndex:0] forKey:@"latitude"];
                                          [temp setObject:[latlongstp2 objectAtIndex:1] forKey:@"longitude"];

                                      }



                                      NSMutableDictionary *currentloc = [Dict objectForKey:@"currentLocation"];

                                      if ([[currentloc allKeys] containsObject:@"address"]) {

                                          [temp setObject:[currentloc objectForKey:@"address"] forKey:@"address1"];


                                      }


                                      [getid addObject:temp];

                                  }


                                  if (getid.count>0)
                                  {
                                      [self updateTable];
                                  }



                              }];

[task resume];

}


- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;    //count of section
}


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


    return [getid count];
}

- (void)tableView:(UITableView *)tableView willDisplayCell: (UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.row == [getid count] - 1 ) {

    }
}


- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    ScheduleTableViewCell *cell   = [tableView      dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    cell.BookingId.text  = [[getid        objectAtIndex:indexPath.row]objectForKey:@"_id"];
    cell.BookingNo.text  = [[getid objectAtIndex:indexPath.row]objectForKey:@"bookingNumber"];
    cell.stop1.text  = [[getid objectAtIndex:indexPath.row]objectForKey:@"address"];
    cell.stop2.text = [[getid objectAtIndex:indexPath.row] objectForKey:@"address1"];
    cell.Currentloc.text = [[getid objectAtIndex:indexPath.row]  objectForKey:@"address"];


    return cell;
}

Answer 1

有很多方法可以实现这一点，例如以下方法：

• 首先，您需要创建一个NSMutableArray在TableViewDelegates和中加载的全局变量DataSaurce。
• 现在，在您的api调用上，您需要在全局数组中添加That记录。
• 在最后一个单元格或上，tableview您可以根据您的API使用下一页URL再次调用它，并在每次调用时重新加载表格
• 您可以使用github上提供的许多ThirdParty库进行加载：

https://github.com/OpenFibers/DragRefreshAndLoadMoreTableDemo

https://github.com/Abizern/PartialTable

https://github.com/robertmryan/UITableView-Bottom-
Refresh

根据您的代码：

在.h类中

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
   NSURL* nextURL;
    int currentPage;

}

在.M类中

- (void)viewDidLoad {

    currentPage = 1;

    [self LoadData];
    [super viewDidLoad];

}


-(void)LoadData
{

    NSURL *theURL = [NSURL URLWithString:[NSString stringWithFormat:@"http://qa.networc.in:1336/api/dispatcher/rideScheduled/:%d",currentPage]];
    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:theURL      cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:20.0f];

    //Specify method of request(Get or Post)
    [theRequest setHTTPMethod:@"GET"];

    //Pass some default parameter(like content-type etc.)
    [theRequest setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [theRequest setValue:@"application/json; charset=UTF-8" forHTTPHeaderField:@"Content-Type"];

    [theRequest addValue:token forHTTPHeaderField:@"x-access-token"];
    NSURLResponse *theResponse = NULL;
    NSError *theError = NULL;

    NSData *responseData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&theResponse error:&theError];
    if (responseData == nil)
    {
        return;
    }

    NSDictionary *dataDictionaryResponse = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&theError];
    NSLog(@"url to send request= %@",theURL);
    NSLog(@"%@",dataDictionaryResponse);



    NSURLSession *session = [NSURLSession sharedSession];

    NSURLSessionDataTask *task = [session dataTaskWithRequest:theRequest
                                            completionHandler:
                                  ^(NSData *data, NSURLResponse *response, NSError *error) {

                                      NSLog(@"Response:%@ %@\n", response, error);
                                      if(error == nil)
                                      {

                                          NSString * text = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
                                          NSLog(@"Data = %@",text);
                                      }


                                      currentPage ++;
                                      dictionary = [[NSJSONSerialization JSONObjectWithData:data options:0 error:nil]objectForKey:@"data"];

                                      NSArray *total =  [dictionary objectForKey:@"total"];
                                      NSLog(@"latlop %@", total);


                                      [getid addObjectsFromArray:total];

                                       [self updateTable];

                                  }];

    [task resume];
}