点击cell会置顶,其他的下移
第一,引入代理
@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>
第二,实现
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.itemList = [[NSMutableArray alloc] init];
//存放置顶数据的数组
NSMutableArray *topArray = [[NSMutableArray alloc] init];
//存放不置顶数据的数组
NSMutableArray *normalArray = [[NSMutableArray alloc] init];
[self.itemList addObject:topArray];
[self.itemList addObject:normalArray];
[normalArray addObject:@"1"];
[normalArray addObject:@"2"];
[normalArray addObject:@"3"];
[normalArray addObject:@"4"];
[normalArray addObject:@"5"];
[normalArray addObject:@"6"];
[normalArray addObject:@"7"];
[normalArray addObject:@"8"];
[normalArray addObject:@"9"];
[normalArray addObject:@"10"];
[normalArray addObject:@"11"];
[normalArray addObject:@"12"];
CGRect frame = {0,20,320,460};
UITableView *tableView = [[UITableView alloc] initWithFrame:frame style:UITableViewStylePlain];
tableView.delegate = self;
tableView.dataSource = self;
[self.view addSubview:tableView];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//设置一共有2个分区,分别做为置顶区与正常区
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 2;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
//根据分区号,获取对应的存放容器
NSArray *itemArray = [self.itemList objectAtIndex:section];
return itemArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//根据分区号,获取对应的存放容器
NSArray *itemArray = [self.itemList objectAtIndex:indexPath.section];
//指定置顶区的唯一标识符..
static NSString *topIdentifier = @"topIdentifier";
//指定正常区的唯一标识符
static NSString *normalIdentifier = @"normalIdentifier";
//声明返回的变量名
UITableViewCell *cell = nil;
switch (indexPath.section) {
case 0://置顶区域
{
cell = [tableView dequeueReusableCellWithIdentifier:topIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:topIdentifier];
}
cell.textLabel.text = itemArray[indexPath.row];
break;
}
case 1://正常区域
{
cell = [tableView dequeueReusableCellWithIdentifier:normalIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:normalIdentifier];
}
cell.backgroundColor = [UIColor whiteColor];
cell.textLabel.text = itemArray[indexPath.row];
}
}
NSLog(@"22222222");
//返回单元格
return cell;
}
//通过点击单元格完成置顶操作...
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//如果点击的是置顶分区则直接返回..
if (indexPath.section == 0) {
return;
}
//否则,则点击的是正常分区,开始整理数据...
NSMutableArray *topArray = [self.itemList objectAtIndex:0];
NSMutableArray *normalArray = [self.itemList objectAtIndex:1];
//正常区域的点击数据
NSString *item = [normalArray objectAtIndex:indexPath.row];
[tableView beginUpdates];//数据数据改变数据,tableview做相应的刷新
//当置顶区域的置顶条数大于等于3时,将置顶区域的最后一个元素移除并且添加到正常区域的第一条
if (topArray.count >= 3)
{
//置顶区域的最后一条数据
NSString *lastTopItem = [topArray lastObject];
[normalArray insertObject:lastTopItem atIndex:0];
[topArray removeObject:lastTopItem];
//第二行
NSIndexPath *lastTopIndexPath = [NSIndexPath indexPathForRow:2 inSection:0];
NSIndexPath *headNormalIndexPath = [NSIndexPath indexPathForRow:0 inSection:1];
[tableView moveRowAtIndexPath:lastTopIndexPath toIndexPath:headNormalIndexPath];
}
//当置顶区域的置顶条数小于3时,直接添加进置顶数组,并且从正常区域移除该对象...
[topArray insertObject:item atIndex:0];
[normalArray removeObject:item];
NSIndexPath *topIndexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[tableView moveRowAtIndexPath:indexPath toIndexPath:topIndexPath];
[tableView endUpdates];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSString *title = nil;
switch (section) {
case 0:
title = @"置顶的啊";
break;
case 1:
title = @"普通的啊";
default:
break;
}
return title;
}