我正在尝试从表视图中删除一行。我有一个数组，其中包含要显示的对象（文章）。我按照教程中的说法做了一切。我删除了行，然后删除了相应的对象表单数组，但总是得到执行。我尝试过针对类似案例的解决方案，但他们无法解决问题。我已经在第3天遇到了这个问题。希望你们能帮忙。谢谢。我会根据需要添加任何其他信息或代码。
编辑：我可能已找到问题的原因。我在每次登录时从外部服务器导入新文章。在每次登录时，我都会发送最后添加的文章的日期，作为回应，我会收到所有不在我的数据库中的文章。您将在代码中看到它。我想只有在删除行之后才会使用接收的数据更新self.article。我可能错了（最有可能:)）。希望这会有所帮助。
InboxViewController.m
//
// ArticleViewController.m
// ReadLater
//
// Created by Ibragim Gapuraev on 09/06/2014.
// Copyright (c) 2014 Sermilion. All rights reserved.
//
#import "InboxViewController.h"
#import "LoginViewController.h"
@interface InboxViewController ()
@end
@implementation InboxViewController
@synthesize db,articles, response, jsonData;
- (NSMutableArray* ) articles
{
if (!articles) {
articles = [[NSMutableArray alloc] initWithCapacity:20];
}
return articles;
}
- (Database* ) db
{
if (!db) {
db = [[Database alloc] init];
}
return db;
}
- (void)setInboxList:(NSMutableArray* )inboxList
{
self.articles = inboxList;
}
//---------------------------------Getting data from web-------------------------------------------//
/**
The method will connect to a given url and send date of article that has been added at last.
Then, connectionDidFinishLoading will receive json array of all articles, that have been added to server database after that time
**/
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://localhost/nextril/index.php"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:15.0];
NSURLConnection * connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[self.db openDatabase];
NSString* date_added = [self.db getLastArticleDate];
[self.db closeDatabase];
//send id of article that was added last, to server,
//which will return json arrya of all articles with id greater then the one sent
[request setHTTPMethod:@"POST"];
[request setHTTPBody:[date_added dataUsingEncoding:NSUTF8StringEncoding]];
if (connection) {
NSLog(@"viewWillAppear: Connecting to server to get data...");
}else{
NSLog(@"viewWillAppear: Error while connecting...");
}
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData*)data
{
response = [[NSData alloc] initWithData:data];
}
//Check if data been received
- (void) connectionDidFinishLoading:(NSURLConnection *)connection
{
if(sizeof(response)>0){
//NSLog(@"Got response from server %@", response);
NSError* error;
NSArray* json = [NSJSONSerialization
JSONObjectWithData:response //1
options:kNilOptions
error:&error];
self.jsonData = [[NSMutableArray alloc] initWithArray:json];
int count = 0;
[self.db openDatabase];
for (int i=0; i<self.jsonData.count; i++) {
NSDictionary *item = [self.jsonData objectAtIndex:i];
NSInteger article_id = [[item objectForKey:@"article_id"]integerValue];
NSString* content = [item objectForKey:@"content"];
NSString* author = [item objectForKey:@"author"];
NSString* date = [item objectForKey:@"date"];
NSString* url = [item objectForKey:@"url"];
NSString* tags = [item objectForKey:@"tags"];
NSInteger archived = [[item objectForKey:@"archived"]integerValue];
NSString* title = [item objectForKey:@"title"];
//NSLog(@"",);
Article* article = [[Article alloc]initWithId:article_id content:content author:author date:date url:url tags:tags arhived:archived title:title];
BOOL added = [self.db addArticleToLocalDatabase:article];
BOOL addedToUser = [self.db addArticleToInbox:article];
[self.articles addObject:article];
count++;
if (added == true && addedToUser == true) {
NSLog(@"connectionDidFinishLoading: Articles has been imported. Size: %d %@", self.articles.count, self.articles);
}else{
NSLog(@"connectionDidFinishLoading: Failed to import article.");
}
}
[self.db closeDatabase];
}else{
NSLog(@"connectionDidFinishLoading: Did not get resopnse from server: %@", response);
}
connection = nil;
}
//----------------------------------------------------------------------------------------------------
- (void)viewDidLoad
{
[super viewDidLoad];
[self.db openDatabase];
self.articles = [self.db importAllInboxArticles:16];
[self.db closeDatabase];
self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:self.navigationItem.rightBarButtonItem,self.editButtonItem, nil];
//NSLog(@"Number of articles in inboxArticles %d", articles.count);
// Do any additional setup after loading the view.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return self.articles.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//NSLog(@"Number of articles in articles %d", self.articles.count);
static NSString *CellIdentifier = @"Content";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
Article* article = [self.articles objectAtIndex:indexPath.row];
NSString *listingKey = article.title;
NSString *listingValues = article.url;
cell.textLabel.text = listingKey;
cell.detailTextLabel.text = listingValues ;
return cell;
}
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSLog(@"Size of artilces: %d", self.articles.count);
[tableView beginUpdates];
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
[self.articles removeObjectAtIndex:indexPath.row];
[tableView endUpdates];
[tableView reloadRowsAtIndexPaths:(NSArray *)indexPath withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
堆栈追踪：
2014-06-17 11：07：49.131 ReadLater [76572：60b] connectionDidFinishLoading：已导入文章。尺寸：4（ ＆＃34;＆＃34 ;, ＆＃34;＆＃34 ;, ＆＃34;＆＃34 ;, ＆＃34;＆＃34; ）2014-06-17 11：07：51.078 ReadLater [76572：60b]艺术品大小：4 2014-06-17 11：07：51.078 ReadLater [76572：60b] *断言失败 - [UITableView _endCellAnimationsWithContext：]，/ SourceCache / UIKit_Sim / UIKit-2935.137 /UITableView.m：1368 2014-06-17 11：07：51.081 ReadLater [76572：60b] * 由于未被捕获而终止应用 异常＆＃39; NSInternalInconsistencyException＆＃39;，原因：＆＃39;无效更新： 第0节中的行数无效。包含的行数 更新后的现有部分（3）必须等于数字 在更新（3）之前，该部分中包含的行加或减 从该部分插入或删除的行数（插入0， 删除1）加上或减去移入或移出的行数 该部分（0移入，0移出）。＆＃39; * 第一次抛出调用堆栈：（0 CoreFoundation 0x018e61e4 exceptionPreprocess + 180 1 libobjc.A.dylib
0x016658e5 objc_exception_throw + 44 2 CoreFoundation
0x018e6048 + [NSException raise：format：arguments：] + 136 3
基金会0x012454de - [NSAssertionHandler handleFailureInMethod：object：file：lineNumber：description：] + 116 4
UIKit 0x00313f63 - [UITableView _endCellAnimationsWithContext：] + 13402 5 UIKit 0x00323cea - [UITableView endUpdatesWithContext：] + 51 6 UIKit
0x00323d18 - [UITableView endUpdates] + 41 7 ReadLater
0x00005044 - [InboxViewController tableView：commitEditingStyle：forRowAtIndexPath：] + 484 8 UIKit
0x003356a3 - [UITableView animateDeletionOfRowWithCell：] + 107 9
UIKit 0x004be595 - [UITableViewCell _swipeDeleteButtonPushed] + 70 10 libobjc.A.dylib 0x01677880 - [NSObject performSelector：withObject：withObject：] + 77 11 UIKit 0x0023d3b9 - [UIApplication sendAction：to：from：forEvent：] + 108 12 UIKit
0x0023d345 - [UIApplication sendAction：toTarget：fromSender：forEvent：] + 61 13 UIKit 0x0033ebd1 - [UIControl sendAction：to：forEvent：] + 66 14 UIKit
0x0033efc6 - [UIControl _sendActionsForEvents：withEvent：] + 577 15 UIKit 0x0033e243 - [UIControl touchesEnded：withEvent：] + 641 16 UIKit
0x005d32e3 _UIGestureRecognizerUpdate + 7166 17 UIKit
0x0027ca5a - [UIWindow _sendGesturesForEvent：] + 1291 18 UIKit
0x0027d971 - [UIWindow sendEvent：] + 1021 19 UIKit
0x0024f5f2 - [UIApplication sendEvent：] + 242 20 UIKit
0x00239353 _UIApplicationHandleEventQueue + 11455 21 CoreFoundation 0x0186f77f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 15 22 CoreFoundation 0x0186f10b __CFRunLoopDoSources0 + 235 23 CoreFoundation 0x0188c1ae __CFRunLoopRun + 910 24 CoreFoundation
0x0188b9d3 CFRunLoopRunSpecific + 467 25 CoreFoundation
0x0188b7eb CFRunLoopRunInMode + 123 26图形服务
0x038da5ee GSEventRunModal + 192 27 GraphicsServices
0x038da42b GSEventRun + 104 28 UIKit
0x0023bf9b UIApplicationMain + 1225 29 ReadLater
0x0000858d main + 141 30 libdyld.dylib
0x01f2d701 start + 1）libc ++ abi.dylib：以uncaught结束 NSException类型的异常（lldb）
答案 0 :(得分：1)
我做到了！）我设置了断点并检查了发生了什么。我接受了@Paulw11的建议并使我的自我文章成为不可变的，并创造了它的可变副本。然后，我决定删除重新加载视图（行）的行，一切都开始工作了。
工作代码：
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return safeArticles.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//NSLog(@"Number of articles in articles %d", self.articles.count);
static NSString *CellIdentifier = @"Content";
//UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
SHCTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
cell.textLabel.backgroundColor = [UIColor clearColor];
// Configure the cell...
Article* article = [safeArticles objectAtIndex:indexPath.row];
NSString *listingKey = article.title;
NSString *listingValues = article.url;
cell.textLabel.text = listingKey;
cell.detailTextLabel.text = listingValues ;
cell.delegate = self;
cell.todoItem = article;
return cell;
}
//// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSLog(@"Size of artilces: %d", safeArticles.count);
[tableView beginUpdates];
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
[safeArticles removeObjectAtIndex:indexPath.row];
[tableView endUpdates];
///[tableView reloadRowsAtIndexPaths:(NSArray *)indexPath withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
答案 1 :(得分：-1)
使用以下方法重新加载这些行而不是整个表：
- (void)reloadRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation: (UITableViewRowAnimation)animation