UITableView实现上拉加载更多

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//创建表格底部

- (void) createTableFooter

{

myTableView.tableFooterView= nil;

UIView *tableFooterView = [[UIViewalloc]initWithFrame:CGRectMake(0.0f,0.0f,myTableView.bounds.size.width,40.0f)];

    UILabel *loadMoreText = [[UILabelalloc]initWithFrame:CGRectMake(0.0f,0.0f,116.0f,40.0f)];

    [loadMoreText setCenter:tableFooterView.center];

    [loadMoreText setFont:[UIFontfontWithName:@"Helvetica Neue"size:14]];

    [loadMoreText setText:@"上拉显示更多数据"];

    [tableFooterView addSubview:loadMoreText];

myTableView.tableFooterView= tableFooterView;

}

- (void)scrollViewDidEndDragging:(UIScrollView*)scrollView willDecelerate:(BOOL)decelerate

{

   // 下拉到最底部时显示更多数据

    if(!_loadingMore&& scrollView.contentOffset.y> ((scrollView.contentSize.height- scrollView.frame.size.height)))

    {
        NSLog(@"开始加载");

        [selfloadDataBegin];

    }

}

//开始加载数据

- (void) loadDataBegin

{

    if (_loadingMore== NO)

    {

        _loadingMore = YES;

        UIActivityIndicatorView *tableFooterActivityIndicator = [[UIActivityIndicatorViewalloc]initWithFrame:CGRectMake(75.0f,10.0f,20.0f,20.0f)];

        [tableFooterActivityIndicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleGray];

        [tableFooterActivityIndicator startAnimating];

        [searchTableView.tableFooterViewaddSubview:tableFooterActivityIndicator];

        NSLog(@"正在加载");

        [selfloadDataing];

    }

}

//加载数据中

- (void) loadDataing

{

/**

*要处理的事件

[selfloadDataEnd];

}

//加载数据完毕

- (void) loadDataEnd

{
    NSLog(@"加载完毕");

    _loadingMore = NO;

    [selfcreateTableFooter];

}

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