我正在使用聊天应用模板，我已将其集成到我的主应用中。我希望表中的每一行都显示来自json文件的数据，以便向用户显示聊天室名称和房间的详细信息，但可以按照我的意愿进行更改，而无需每次都将应用程序重新提交给apple。
而不是把完整的代码放在这里，它真的很长，所以我把它Here编辑：它现在也在下面。
此外，不是删除原始代码（因为例如房间名称已经在应用程序中指定），我已经将其评分出来，因此您不会猜测我从原始模板中做了哪些更改。
最后，我的问题......当我运行应用程序时，数据会显示我想从tableview中的JSON文件中获取它的方式，但是当选择一行时，应用程序崩溃而不是让用户进入聊天室。
我在解决这个问题方面处于领先地位，我已经尝试在这里搜索并使用我能想到的每个术语来解决它。
我在控制台中收到的错误消息是：
2014-08-13 09：27：23.708 Huddle [6073：60b] - [__ NSCFDictionary stringByTrimmingCharactersInSet：]：无法识别的选择器发送到实例0x17e85350
我想发布截图，但这不允许我 - 所以将其上传到我的网络服务器 - Here（如果不允许，请不要再次暂停此问题，只是给我发电子邮件＆amp;我将立即删除图像的链接，我只是想提供我能提供的所有信息。
万分感谢百万提供任何帮助！
编辑：网站管理员需要此问题中的完整代码，因此请进行修改以添加：
#import "ProgressHUD.h"
#import <Firebase/Firebase.h>
#import <FirebaseSimpleLogin/FirebaseSimpleLogin.h>
#import "common.h"
#import "utilities.h"
#import "MenuViewController.h"
#import "LoginViewController.h"
#import "ChatViewController.h"
@interface MenuViewController()
{
NSDictionary *userinfo;
NSMutableArray *items;
NSURL *url;
UIBarButtonItem *buttonLogin;
UIBarButtonItem *buttonLogout;
}
@end
@implementation MenuViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"Chat";
userinfo = nil;
// Allocate Memory for the raw JSON Dictionary, and for just the tv episodes.
userinfo = [[NSDictionary alloc] init];
items = [[NSMutableArray alloc] init];
// Setup the URL with the JSON URL.
url = [NSURL URLWithString:@"http://mackuk.co.uk/chat.json"];
[self parseJSONWithURL:url];
/*ORIGINAL CHAT ROOM NAMES
items = [[NSMutableArray alloc] init];
[items addObject:@"Room 1"];
[items addObject:@"Room 2"];
*/
buttonLogin = [[UIBarButtonItem alloc] initWithTitle:@"Login" style:UIBarButtonItemStyleBordered target:self action:@selector(actionLogin)];
buttonLogout = [[UIBarButtonItem alloc] initWithTitle:@"Logout" style:UIBarButtonItemStyleBordered target:self action:@selector(actionLogout)];
[self checkAuthStatus];
}
- (void) parseJSONWithURL:(NSURL *) jsonURL
{
// Set the queue to the background queue. We will run this on the background thread to keep
// the UI Responsive.
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0);
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
// Run request on background queue (thread).
dispatch_async(queue, ^{
NSError *error = nil;
// Request the data and store in a string.
NSString *json = [NSString stringWithContentsOfURL:jsonURL
encoding:NSASCIIStringEncoding
error:&error];
if (error == nil){
// Convert the String into an NSData object.
NSData *jsonData = [json dataUsingEncoding:NSASCIIStringEncoding];
// Parse that data object using NSJSONSerialization without options.
userinfo = [NSJSONSerialization JSONObjectWithData:jsonData options:kNilOptions error:&error];
// Parsing success.
if (error == nil)
{
dispatch_async(dispatch_get_main_queue(), ^{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
items = [[userinfo valueForKey:@"Chat"] valueForKey:@"rooms"];
[self.tableView reloadData];
});
}
// Parsing failed, display error as alert.
else
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error!" message:@"Uh Oh, Parsing Failed." delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
[alertView show];
}
}
// Request Failed, display error as alert.
else
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error!" message:@"Request Error! Check that you are connected to wifi or 3G/4G with internet access." delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
[alertView show];
}
});
}
- (void)showError:(id)message
{
[ProgressHUD showError:message Interacton:NO];
}
- (void)checkAuthStatus
{
[ProgressHUD show:@"Please wait..." Interacton:NO];
Firebase *ref = [[Firebase alloc] initWithUrl:FIREBASE];
FirebaseSimpleLogin *authClient = [[FirebaseSimpleLogin alloc] initWithRef:ref];
[authClient checkAuthStatusWithBlock:^(NSError *error, FAUser *user)
{
if (error == nil)
{
[ProgressHUD dismiss];
if (user != nil)
{
userinfo = ParseUserData(user.thirdPartyUserData);
self.navigationItem.rightBarButtonItem = buttonLogout;
}
else self.navigationItem.rightBarButtonItem = buttonLogin;
}
else
{
NSString *message = [error.userInfo valueForKey:@"NSLocalizedDescription"];
[self performSelectorOnMainThread:@selector(showError:) withObject:message waitUntilDone:NO];
}
}];
}
- (void)actionLogin
{
LoginViewController *loginViewController = [[LoginViewController alloc] init];
loginViewController.delegate = self;
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:loginViewController];
navController.navigationBar.translucent = NO;
navController.navigationBar.barTintColor = COLOR_TITLE;
navController.navigationBar.tintColor = COLOR_TITLETEXT;
navController.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName:COLOR_TITLETEXT};
[self presentViewController:navController animated:YES completion:nil];
}
- (void)didFinishLogin:(NSDictionary *)Userinfo
{
userinfo = [Userinfo copy];
self.navigationItem.rightBarButtonItem = buttonLogout;
}
- (void)actionLogout
{
Firebase *ref = [[Firebase alloc] initWithUrl:FIREBASE];
FirebaseSimpleLogin *authClient = [[FirebaseSimpleLogin alloc] initWithRef:ref];
[authClient logout];
userinfo = nil;
self.navigationItem.rightBarButtonItem = buttonLogin;
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [items count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"cell"];
}
cell.textLabel.text = [[items objectAtIndex:indexPath.row] objectForKey:@"name"];
NSNumber *seasonNum = [[items objectAtIndex:indexPath.row] objectForKey:@"detail"];
NSNumber *episodeNum = [[items objectAtIndex:indexPath.row] objectForKey:@"kotime"];
NSMutableString *seasonEpisodeNum = [NSMutableString stringWithFormat:@" %@ ", seasonNum];
[seasonEpisodeNum appendString:[NSMutableString stringWithFormat:@" %@", episodeNum]];
cell.detailTextLabel.text = seasonEpisodeNum;
return cell;
/* ORIGINAL CELL INFO
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
if (cell == nil) cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"cell"];
cell.textLabel.text = [items objectAtIndex:indexPath.row];
return cell;*/
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
if (userinfo != nil)
{
NSString *chatroom = [items objectAtIndex:indexPath.row];
ChatViewController *chatViewController = [[ChatViewController alloc] initWith:chatroom Userinfo:userinfo];
self.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:chatViewController animated:YES];
self.hidesBottomBarWhenPushed=NO;
}
else [self actionLogin];
}
#pragma mark iAd Delegate Methods
-(void)bannerViewDidLoadAd:(ADBannerView *)banner {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[banner setAlpha:1];
[UIView commitAnimations];
}
-(void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[banner setAlpha:0];
[UIView commitAnimations];
}
@end