我正在为一家游戏服务器公司开发一个应用程序，该应用程序的一部分要求用户查看他或她的游戏服务器的列表，以及它们是否在线、离线、有多少玩家、服务器名称等. 这些数据都可以在 Web 上托管的 PHP 文件中找到，该文件是从 MySQL 数据库更新的，查看时会输出 JSON。
使用下面的代码，这似乎不起作用。我加载视图并立即在NSDictionary *myServer = [servers objectAtIndex:indexPath.row];. 删除indexPath.row并用 0 或 1 替换它时，数据会显示UITableView在我的 Storyboard 中，但它会连续显示 4 次，并且仅针对 JSON 文件中的该条目（0 或 1）。我不能把它保持在一个固定的数字，因为客户端可能有 100 台服务器，或者只有 5 台服务器，这就是为什么我需要类似indexPath.row. 下面，我还附上了从服务器提供并直接从应用程序代码访问的 JSON 的样子
如果有人能告诉我问题是什么并提出一个针对我的情况的独特解决方案来摆脱这个 SIGABRT 错误，我将非常感激，一旦我们这样做了，请确保它不会在 TableView 中显示 4 次就是现在。
我的头文件：
#import <UIKit/UIKit.h>
#import "ServerDetailViewController.h"
@interface SecondViewController : UITableViewController {
IBOutlet UITableView *mainTableView;
NSDictionary *news;
NSMutableData *data;
}
@property (weak, nonatomic) IBOutlet UIBarButtonItem *refreshServersButton;
- (IBAction)refreshServers:(id)sender;
@end
我的主文件：
#import "SecondViewController.h"
@interface SecondViewController ()
@end
@implementation SecondViewController
- (void)viewDidLoad
{
[super viewDidLoad];
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
NSURL *url = [NSURL URLWithString:@"REDACTED"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
data = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)theData
{
[data appendData:theData];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
news = [NSJSONSerialization JSONObjectWithData:data options:nil error:nil];
[mainTableView reloadData];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
UIAlertView *errorView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Unable to load server list. Make sure you are connect to either 3G or Wi-Fi or try again later." delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[errorView show];
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
- (int)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [news count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UIColor *colorGreen = [UIColor colorWithRed:91.0f/255.0f green:170.0f/255.0f blue:101.0f/255.0f alpha:1.0f];
UIColor *colorRed = [UIColor redColor];
static NSString *CellIdentifier = @"MainCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
UILabel *serverName = (UILabel *)[cell viewWithTag:100];
UILabel *serverPlayers = (UILabel *)[cell viewWithTag:101];
UILabel *serverStatus = (UILabel *)[cell viewWithTag:102];
UILabel *serverOfflineName = (UILabel *)[cell viewWithTag:103];
serverPlayers.textColor = [UIColor grayColor];
NSDictionary *resultDict = [news objectForKey:@"result"];
NSArray *servers = [resultDict objectForKey:@"servers"];
NSDictionary *myServer = [servers objectAtIndex:indexPath.row];
NSString *titleOfServer = [myServer objectForKey:@"title"];
NSNumber *statusOfServer = [NSNumber numberWithInt:[[myServer objectForKey:@"status"] intValue]];
NSNumber *playersOnServer = [NSNumber numberWithInt:[[myServer objectForKey:@"players"] intValue]];
if ([[statusOfServer stringValue] isEqualToString:@"0"]) {
serverName.text = @"";
serverOfflineName.text = titleOfServer;
serverStatus.textColor = colorRed;
serverStatus.text = @"OFFLINE";
serverPlayers.text = @"";
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
} else if ([[statusOfServer stringValue] isEqualToString:@"1"]) {
serverName.text = titleOfServer;
serverOfflineName.text = @"";
serverStatus.textColor = colorGreen;
serverStatus.text = @"ONLINE";
serverPlayers.text = [playersOnServer stringValue];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
} else if ([[statusOfServer stringValue] isEqualToString:@"2"]) {
serverName.text = @"";
serverOfflineName.text = titleOfServer;
serverStatus.textColor = [UIColor blueColor];
serverStatus.text = @"BUSY";
serverPlayers.text = @"";
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
} else if ([[statusOfServer stringValue] isEqualToString:@"3"]) {
serverName.text = @"";
serverOfflineName.text = titleOfServer;
serverStatus.textColor = [UIColor grayColor];
serverStatus.text = @"SUSPENDED";
serverPlayers.text = @"";
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
} else if ([[statusOfServer stringValue] isEqualToString:@"-1"]) {
serverName.text = @"";
serverOfflineName.text = titleOfServer;
serverStatus.textColor = [UIColor orangeColor];
serverStatus.text = @"CRITICAL ERROR";
serverPlayers.text = @"";
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
ServerDetailViewController *detail = [self.storyboard instantiateViewControllerWithIdentifier:@"detail"];
[self.navigationController pushViewController:detail animated:YES];
}
- (IBAction)refreshServers:(id)sender {
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
NSURL *url = [NSURL URLWithString:@"REDACTED"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
}
@end
来自服务器的 JSON 代码：{"status":"OK","error":"","debug":"2 server(s)","result":{"servers":[{"id":1,"title":"Test","players":0,"slots":10,"status":3},{"id":2,"title":"Creative Spawn","players":0,"slots":5,"status":-1}]}}