如何將一個按鈕添加到tableview的最後一行？

Question

我無法找到解決方案如何在UITableViewCell中添加此「加載更多」按鈕。

像 「更多結果...」 選項，在這個應用程序

http://itunes.apple.com/in/app/zdnet/id425580940?mt=8

希望有人能幫助我...

Answer 1

而不是普通的內容，使得你的上單元格UIButton。當用戶單擊它時，用新信息更新數據源（不要忘記更新每個部分中的行數），並在tableview上調用reloadData。始終將按鈕保持在最底部的單元格中。

如何更新數據源完全取決於您的實施。

要將按鈕添加到一個UITableViewCell你可以的cellForRowAtIndexPath做到這一點：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ 
    if (indexPath.row == dataForCells.count + 1){ // Assume dataForCells is an NSArray holding your data. Initially it should hold 10 objects, then after clicking this button it will be 20, 30, etc. as you load data in load10MorePressed. However, this depends on your implementation. You could be storing your data in some other way. 
     static NSString *CellIdentifier = @"LoadMoreCell"; 

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
     if (cell == nil) { 
      cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; 
     } 

     UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
     button.frame = CGRectInset(cell.frame, 5, 5); 
     [button setTitle:@"Load 10 More" forState:UIControlStateNormal]; 
     [button addTarget:self action:@selector(load10MorePressed:) forControlEvents:UIControlEventTouchUpInside]; 
     [cell addSubview:button]; 
    } else { 
     static NSString *CellIdentifier = @"NormalCell"; 

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
     if (cell == nil) { 
      cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; 
     } 

     // Setup your normal data cells here 
    } 
} 

但是你要確保你有一個名爲load10MorePressed方法：

-(IBAction)load10MorePressed:(id)sender{ 
    NSMutableArray *temp = [NSMutableArray arrayWithArray:dataForCells]; 
    for (int x=0; x<10; x++){ 
     [temp addObject:[Create new objects here. Depends on your implementation, probably downloading from someplace...]]; 
    } 
    self.dataForCells = temp; 
    [self.tableView reloadData]; 
} 

最後，不要」 t忘記返回桌面視圖中的單元格數量：

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

    if (section == 0){ 
     return dataForCells.count + 1; 
    } else { 
     return 0; 
    } 
} 

Answer 2

As far a我的知識你可以這樣做。

把按鈕加載多了。當用戶點擊buttonAction中的按鈕時，取一個BOOL變量，然後使用[tableview reloadData];然後在numberofrowsintableview方法中檢查BOOL變量。如果是，則返回（Ex： ）10 + previousrows.Pass數據也

Answer 3

我明白你的問題： - 你要做的是在表視圖下面添加一個活動指標。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 

    static NSString *CellIdentifier = @"Cell"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; 
    } 
    cell.textLabel.text=[self.array objectAtIndex:indexPath.row]; 

    if (indexPath.row ==[array count] -1) { //this method will get called when you will scroll to the bottom of your table view 
     [self sendRequestMethod]; 

    } 
    else { 
     //NSLog(@"not nearest row"); 
     //[self remove]; 
    } 

    return cell; 
} 

-(void)sendRequestMethod 
{ 
    [self.newTableView setUserInteractionEnabled:NO]; 
    [indicator startAnimating];//make sure you start your indicator now perform what you want to do IN my case I am sending a request to server 

    NSString *str = [NSString stringWithFormat:@"http://www.google.com"]; 
    NSURL *url = [NSURL URLWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url]; 
    [request setRequestMethod:@"POST"]; 
    [request setDelegate:self]; 
    [request setDidFinishSelector:@selector(responseSuccedMethod:)]; 
    [request setDidFailSelector:@selector(responseFailedMethod:)]; 
    [networkQueue addOperation: request]; 
    [networkQueue go]; 


} 

-(void)responseSuccedMethod:(ASIHTTPRequest *)req 
{ 
    [self.newTableView setUserInteractionEnabled:YES]; 
    [indicator stopAnimating]; 
    [newTableView reloadData]; 

} 

Answer 4

也許做到這一點更簡單的方法是採用tableView:viewForFooterInSection:和tableView:heightForFooterInSection方法，並與「加載更多結果」按鈕返回視圖。

-(id)init 
{ 
    self = [super init]; 
    if(self) { 
     // create a footer view so that we can add it later when we need to 
     loadMoreView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)]; 
     UIButton* moreButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
     [[moreButton titleLabel] setText:@"Load More Results"]; 
     [moreButton addTarget:self action:@selector(loadMore:) forControlEvents:UIControlEventTouchUpInside]; 
     [loadMoreView addSubview:moreButton];    

     // other init code here 
    } 
    return self 
} 

-(UIView*)tableView:(UITableView*)tv viewForFooterInSection:(NSInteger)s 
{ 
    return loadMoreView; 
} 
-(CGFloat)tableView:(UITableView*)tv heightForFooterInSection:(NSInteger)s 
{ 
    return [loadMoreView frame].size.height; // or 40 since that's what we set it to 
}