//删除第一个元素

[self.data removeObjectAtIndex:0];

//刷新表视图---重新执行数据源方法和代理方法

[self.tableView reloadData];

//把第2个单元格的内容改为“呵呵”

//构建IndexPath

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:2 inSection:0];

//取到单元格

UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];

cell.textLabel.text = @"呵呵";

//输出在屏幕上显示的单元格的内容

NSArray *cells = [self.tableView visibleCells];

for (UITableViewCell *cell in cells) {

NSLog(@"%@", cell.textLabel.text);

}

//输出在屏幕上显示的单元格的下标

NSArray *indexPaths = [self.tableView indexPathsForVisibleRows];

for (NSIndexPath *indexPath in indexPaths) {

NSLog(@"%ld", indexPath.row);

}

// 滑动到指定的位置，可以配置动画

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:10 inSection:0];

[self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:true];


}


- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}


#pragma mark -UITableViewDataSource

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

{

return self.data.count;

}




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

{

UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];

NSString *fontName = self.data[indexPath.row];

cell.textLabel.text = fontName;

// cell.textLabel.font = [UIFont fontWithName:fontName size:20];

return cell;

}


//设置section头部、尾部视图的高度

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section

{

return 80;

}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section

{

return 80;

}

//自定义头标题

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{

UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0,[UIScreen mainScreen].bounds.size.width, 200)];

UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(10, 20, 100, 30)];

label.text = @"123213";

label.backgroundColor = [UIColor whiteColor];

[view addSubview:label];

NSLog(@"%@:",view);

view.backgroundColor = [UIColor blueColor];

return view;

}

//设置单元格的高度

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

{

if (indexPath.row == 0) {

return 100;

}else if (indexPath.row == 1) {

return 200;

}

return 44;

}