我正在使用MGTwitterEngine几乎一切都想通了，但由于某种原因，我无法弄清楚如何在我的时间轴中返回更多推文！它通过我正在使用的方法接收大约20条推文，如果我添加一个整数，例如：return count = 100;，我可以告诉我现在有100个单元格加载时和滚动指示器但是当我滚动到那个18- 19单元格我收到此错误：
SIGABRT - [NSMutableArray objectAtIndex：]：索引20超出边界[0 .. 19]' * 首次调用堆栈：
我知道这意味着什么：没有更多信息可以在第20单元收到。我很困惑，进出MGTwitterEngine寻找默认的推文计数，但我找不到它。我正在使用转储来创建我的NSString，并且转储似乎只能为每次登录提供大约20条推文。请帮忙，我的书中的任何建议都很好！谢谢！
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
int count = [tweets count];
// Return just enough cells to fill the screen during loading ....
if (count == 0)
count = MyCustomRowCount;
else {
//Here is where I think I need to add a else return integer but dont know how
}
return count;
return [tweets count];
return [authors count];
return [avatarsURL count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *identifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
[cell autorelease];
}
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"cell"]autorelease];
/*
//Here it adds a nice shadow to the table view but will crash on rotation and send a
wird dump !!!????
tableView.layer.shadowColor = [[UIColor blackColor] CGColor];
tableView.layer.shadowOffset = CGSizeMake(1.0f, 1.0f);
tableView.layer.shadowRadius = 8.0f;
tableView.layer.shadowOpacity = 1.0f;
*/
[cell.textLabel setNumberOfLines:1];
[cell.textLabel setText:[(Tweet*)[authors objectAtIndex:indexPath.row] author]];
[cell.detailTextLabel setText:[(Tweet*)[tweets objectAtIndex:indexPath.row] tweet]];
[cell.detailTextLabel setNumberOfLines:10];
[cell.textLabel setTextColor:[UIColor darkGrayColor]];
[cell.textLabel setShadowColor:[UIColor whiteColor]];
[cell.textLabel setShadowOffset:CGSizeMake(0.5, 0.5)];
[cell.detailTextLabel setTextColor:[UIColor blackColor]];
//[cell.detailTextLabel setText:[(Tweet*)[retweetCount objectAtIndex:indexPath.row]
reTweetCount]];
[cell.textLabel setUserInteractionEnabled:YES];
[cell.contentView setMultipleTouchEnabled:YES];
// cell.text = [[NSString alloc] initWithFormat:@"Cell :%i", indexPath.row];
// Here we use the new provided setImageWithURL: method to load the web image with
SDWebImageManager
[cell.imageView setImageWithURL:[NSURL URLWithString:[(Tweet*)[avatarsURL
objectAtIndex:indexPath.row]avatarURL]]
placeholderImage:[UIImage imageNamed:@"avatar.png"]];
//add gradient to cell
UIImage *gradient = [UIImage imageNamed:@"gradientcell2.png"];
UIImageView *cellimage = [[UIImageView alloc] initWithImage:gradient];
cellimage.contentMode = UIViewContentModeScaleToFill;
cell.backgroundView = cellimage;
[cellimage release];
UIImage *selectedGradient = [UIImage imageNamed:@"selectedcell.png"];
UIImageView *selectedCell = [[UIImageView alloc] initWithImage:selectedGradient];
selectedCell.contentMode = UIViewContentModeScaleToFill;
cell.selectedBackgroundView = selectedCell;
[tableView setBackgroundColor:[UIColor clearColor]];
return cell;
}
//get cell accessory
-(UITableViewCellAccessoryType)tableView:(UITableView *)tableView
accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath {
if(indexPath.row < [tweets count]){
}
return UITableViewCellAccessoryDisclosureIndicator;
}
// custom hieght
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath {
return 80;
}
//select tweet bring to detail view ..... Also bring in the Users information who made the tweet!
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath {
//Get the selected tweets
NSString *selectedTweet = [(Tweet*)[tweets objectAtIndex:indexPath.row] tweet];
NSString *selectedUser = [(Tweet*)[tweets objectAtIndex:indexPath.row] author];
NSString *selectedUserInfo = [(Tweet*)[tweets objectAtIndex:indexPath.row] user];
NSString *retweetCount = [(Tweet*)[tweets objectAtIndex:indexPath.row] reTweetCount ];
// NSString *selectedUserFriendsCount = [(Tweet*)[tweets objectAtIndex:indexPath.row] userFriendsCount];------HUH? NO soup for ME!
NSString *selectedUserFollowersCount = [(Tweet*)[tweets objectAtIndex:indexPath.row] userFollowersCount];
//Initialize the detail view controller and display it.
TwitterDetailViewController*dvController = [[TwitterDetailViewController alloc]
initWithNibName:@"TwitterDetailViewController" bundle:[NSBundle mainBundle]];
dvController.selectedTweet = selectedTweet;
dvController.selectedUser = selectedUser;
dvController.selectedUserInfo = selectedUserInfo;
// dvController.selectedUserFriendsCount = selectedUserFriendsCount;------Doesnt reconize the call for some odd reason!
dvController.selectedUserFollowersCount = selectedUserFollowersCount;
dvController.retweetCount = retweetCount;
dvController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:dvController animated:YES];
//[self.navigationController pushViewController:webController animated:YES];-------would rather use navagation controller for several obvious reasons
[dvController release];
dvController = nil;
}
答案 0 :(得分：0)
当你给它一些不一致的东西时，UITableView并不喜欢它。如果更改模型，则需要调用[tableView reloadData]或者如果要为更改设置动画，请调用[tableView beingUpdate] [tableView endUpdate]，并在中间插入/删除所有插入/移除单元格操作。
另一方面，我不确定你为什么要这样做：
NSString *identifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
[cell autorelease];
}
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:@"cell"];
[cell autorelease];
首先，如果(cell == nil)，则调用自动释放将无法执行任何操作。
重用标识符是一个flyweight模式。如果dequeueReusableCellWithIdentifier:返回nil，则表示池中没有单元对象供您使用，您应为其分配一个新对象。 dequeueReusableCellWithIdentifier也已经返回一个自动释放对象。
而是试试这个：
NSString *identifier = @"mytweetcell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier] autorelease];
}