点击tableview的头视图按钮来达到收放tableview的列表

//

// ViewController.m

// XIBForiPad

//

// Created by Lu_Ca on 15/8/12.

// Copyright (c) 2015年 Lu_Ca. All rights reserved.

//

//

//点击tableview的头视图按钮来达到收放tableview的列表

//

#import "ViewController.h"

#import "XibForCell.h"

#import "XibModel.h"

@interface
ViewController ()<UITableViewDataSource,UITableViewDelegate>

@end

@implementation ViewController
{

UITableView *_tabelView;

NSMutableArray *_dataSource;

UIButton *button;

XibModel *_modle;
}
- (void)viewDidLoad {

[super
viewDidLoad];

_dataSource = [NSMutableArray
array];

_modle = [[XibModel
alloc] init];

_modle.isOn =
YES;

_tabelView = [[UITableView
alloc] initWithFrame:CGRectMake(0,
0, 1024,
768)
style:UITableViewStyleGrouped];

_tabelView.delegate =
self;

_tabelView.dataSource =
self;
[self.view
addSubview:_tabelView];



for(NSInteger i =
0 ;i<15;i++){

XibModel *model = [[XibModel
alloc] init];
model.name = [NSString
stringWithFormat:@"小明%d",i];
model.age = [NSString
stringWithFormat:@"%d",10+i];
model.sex =
@"男";
[_dataSource
addObject:model];
}



// Do any additional setup after loading the view, typically from a nib.
}

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

return 80;
}

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

button = [UIButton
buttonWithType:UIButtonTypeCustom];

button.frame =
CGRectMake(0,
0, 1024,
80);

[button
addTarget:self
action:@selector(clickHeaderButton:)
forControlEvents:UIControlEventTouchUpInside];

button.backgroundColor = [UIColor
redColor];

return button;
}

//点击头视图按钮，是列表达到收放
- (void)clickHeaderButton:(UIButton *)sender
{

//sender.selected = !sender.selected;
用这种方式来区分判断是不行的，因为每次刷新就会调用tableview的头视图，就会重新创建头视图的按钮。达不到效果，所以需要有一个页面加载后只创建一次的变量来记录

_modle.isOn = !_modle.isOn;



[_tabelView
reloadSections:[NSIndexSet
indexSetWithIndex:0]
withRowAnimation:UITableViewRowAnimationAutomatic];


NSIndexPath *indexPath = [NSIndexPath
indexPathForItem:0
inSection:0];

if(_modle.isOn){//选中

[_tabelView
scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionMiddle
animated:YES];
}


}

//不同的情况不同的行数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

if(_modle.isOn){

return _dataSource.count;
}

return 0;
}

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

return 122;
}

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

NSString *cellid =
@"xib";

XibForCell *cell = [tableView
dequeueReusableCellWithIdentifier:cellid];

if(!cell){

cell = [[[NSBundle
mainBundle] loadNibNamed:@"XibForPad"
owner:self
options:nil]
lastObject];
}

XibModel *model =
_dataSource[indexPath.row];
cell.name.text = model.name;
cell.age.text = model.age;
cell.sex.text = model.sex;

return cell;


}

- (void)didReceiveMemoryWarning {

[super
didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.
}

@end